Fare Guide

Estimated lowest fares found within 7 days

Cheapest Airline American Airlines

The cheapest airline(s) flying from Boston to Seattle is American Airlines.

  • American Airlines American Airlines
  • Alaska Airlines Alaska Airlines
  • JetBlue Airways JetBlue Airways
  • Southwest Airlines Southwest Airlines
  • United Airlines United Airlines
  • Spirit Airlines Spirit Airlines
Cheapest Month January

Travel Period: December 2024 - November 2025

The cheapest month(s) to fly from Boston to Seattle is January.

  • Dec 2024
  • Jan 2025
  • Feb 2025
  • Mar 2025
  • Apr 2025
  • May 2025
  • Jun 2025
  • Jul 2025
  • Aug 2025
  • Sep 2025
  • Oct 2025
  • Nov 2025
Cheapest Day of the Week Saturday

The cheapest day(s) of the week to fly from Boston to Seattle is Saturday.

  • Sun Sunday
  • Mon Monday
  • Tue Tuesday
  • Wed Wednesday
  • Thu Thursday
  • Fri Friday
  • Sat Saturday

Flight Schedules

Last Updated: Sat, 2 Nov, 2024

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      • Availability
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      • 07:00 BOS
        10:25 SEA
        6Hrs, 25m Direct
      • BOSBoston Logan International Airport 07:00 - SEA 10:25 6h 25m Direct
      • BOSBoston Logan International Airport 07:00
      • SEASeattle/Tacoma International Airport 10:25
      • 6h 25m
      • Direct
      • JetBlue Airways (B6 497)Airbus Industrie A321
      • JetBlue Airways (B6 497)
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      • Airbus Industrie A321
      • 07:07 BOS
        10:34 SEA
        6Hrs, 27m Direct
      • BOSBoston Logan International Airport 07:07 - SEA 10:34 6h 27m Direct
      • BOSBoston Logan International Airport 07:07
      • SEASeattle/Tacoma International Airport 10:34
      • 6h 27m
      • Direct
      • Alaska Airlines (AS 537)Boeing 737 Max 9 Passenger
      • Alaska Airlines (AS 537)
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      • Boeing 737 Max 9 Passenger
      • 07:07 BOS
        10:39 SEA
        6Hrs, 32m Direct
      • BOSBoston Logan International Airport 07:07 - SEA 10:39 6h 32m Direct
      • BOSBoston Logan International Airport 07:07
      • SEASeattle/Tacoma International Airport 10:39
      • 6h 32m
      • Direct
      • Alaska Airlines (AS 537)Boeing 737 800
      • Alaska Airlines (AS 537)
        • -
        • -
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        • -
        • -
      • Boeing 737 800
      • 07:07 BOS
        10:34 SEA
        6Hrs, 27m Direct
      • BOSBoston Logan International Airport 07:07 - SEA 10:34 6h 27m Direct
      • BOSBoston Logan International Airport 07:07
      • SEASeattle/Tacoma International Airport 10:34
      • 6h 27m
      • Direct
      • Alaska Airlines (AS 537)Boeing 737
      • Alaska Airlines (AS 537)
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      • Boeing 737
      • 07:07 BOS
        10:34 SEA
        6Hrs, 27m Direct
      • BOSBoston Logan International Airport 07:07 - SEA 10:34 6h 27m Direct
      • BOSBoston Logan International Airport 07:07
      • SEASeattle/Tacoma International Airport 10:34
      • 6h 27m
      • Direct
      • Alaska Airlines (AS 537)Boeing 737 800
      • Alaska Airlines (AS 537)
        • -
        • -
        • -
        • -
        • -
        • -
        • S
      • Boeing 737 800
      • 08:27 BOS
        11:50 SEA
        6Hrs, 23m Direct
      • BOSBoston Logan International Airport 08:27 - SEA 11:50 6h 23m Direct
      • BOSBoston Logan International Airport 08:27
      • SEASeattle/Tacoma International Airport 11:50
      • 6h 23m
      • Direct
      • Alaska Airlines (AS 364)Boeing 737
      • Alaska Airlines (AS 364)
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      • Boeing 737
      • 08:27 BOS
        11:50 SEA
        6Hrs, 23m Direct
      • BOSBoston Logan International Airport 08:27 - SEA 11:50 6h 23m Direct
      • BOSBoston Logan International Airport 08:27
      • SEASeattle/Tacoma International Airport 11:50
      • 6h 23m
      • Direct
      • Alaska Airlines (AS 364)Boeing 737 Max 9 Passenger
      • Alaska Airlines (AS 364)
        • -
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      • Boeing 737 Max 9 Passenger
      • 12:15 BOS
        23:00 SEA
        13Hrs, 45m Direct
      • BOSBoston Logan International Airport 12:15 - SEA 23:00 13h 45m Direct
      • BOSBoston Logan International Airport 12:15
      • SEASeattle/Tacoma International Airport 23:00
      • 13h 45m
      • Direct
      • Southwest Airlines (WN 4233)Boeing 737 Max 8 Passenger
      • Southwest Airlines (WN 4233)
        • -
        • -
        • -
        • -
        • -
        • -
        • S
      • Boeing 737 Max 8 Passenger
      • 16:47 BOS
        20:15 SEA
        6Hrs, 28m Direct
      • BOSBoston Logan International Airport 16:47 - SEA 20:15 6h 28m Direct
      • BOSBoston Logan International Airport 16:47
      • SEASeattle/Tacoma International Airport 20:15
      • 6h 28m
      • Direct
      • Alaska Airlines (AS 459)Boeing 737 800
      • Alaska Airlines (AS 459)
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      • Boeing 737 800
      • 16:47 BOS
        20:15 SEA
        6Hrs, 28m Direct
      • BOSBoston Logan International Airport 16:47 - SEA 20:15 6h 28m Direct
      • BOSBoston Logan International Airport 16:47
      • SEASeattle/Tacoma International Airport 20:15
      • 6h 28m
      • Direct
      • Alaska Airlines (AS 459)Boeing 737
      • Alaska Airlines (AS 459)
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      • Boeing 737
      • 16:47 BOS
        20:15 SEA
        6Hrs, 28m Direct
      • BOSBoston Logan International Airport 16:47 - SEA 20:15 6h 28m Direct
      • BOSBoston Logan International Airport 16:47
      • SEASeattle/Tacoma International Airport 20:15
      • 6h 28m
      • Direct
      • Alaska Airlines (AS 459)Boeing 737 Max 9 Passenger
      • Alaska Airlines (AS 459)
        • -
        • -
        • -
        • -
        • -
        • -
        • S
      • Boeing 737 Max 9 Passenger
      • 19:10 BOS
        00:50 SEA
        8Hrs, 40m 1 Stop (DEN)
      • BOSBoston Logan International Airport 19:10 - SEA 00:50 8h 40m 1 Stop (DEN) Denver
      • BOSBoston Logan International Airport 19:10
        DENDenver Intl Airport 22:50
      • DENDenver Intl Airport 21:55
        SEASeattle/Tacoma International Airport 00:50
      • 8h 40m (55m)
      • 1 Stop DEN · Denver 55m
      • Southwest Airlines (WN 1766)Boeing 737 800
        Southwest Airlines (WN 1061)Boeing 737 Max 8 Passenger
      • Southwest Airlines (WN 1766)
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      • 19:15 BOS
        00:50 SEA
        8Hrs, 35m 1 Stop (DEN)
      • BOSBoston Logan International Airport 19:15 - SEA 00:50 8h 35m 1 Stop (DEN) Denver
      • BOSBoston Logan International Airport 19:15
        DENDenver Intl Airport 22:50
      • DENDenver Intl Airport 22:00
        SEASeattle/Tacoma International Airport 00:50
      • 8h 35m (50m)
      • 1 Stop DEN · Denver 50m
      • Southwest Airlines (WN 3903)Boeing 737 Max 8 Passenger
        Southwest Airlines (WN 540)Boeing 737 700
      • Southwest Airlines (WN 3903)
        • -
        • -
        • -
        • -
        • -
        • S
        • -
      • 23:59 ORD
        21:30 IAD
        10Hrs, 02m 1 Stop (SEA)
      • ORDChicago O'Hare International Airport 23:59 - IAD 21:30 10h 02m 1 Stop (SEA) Seattle
      • ORDChicago O'Hare International Airport 23:59
        BOSBoston Logan International Airport 19:43
      • SEASeattle/Tacoma International Airport 02:45
        IADWashington Dulles International Airport 21:30
      • 10h 02m (1h 25m)
      • 1 Stop SEA · Seattle 1h 25m
      • United Airlines (UA 1381)Airbus
        United Airlines (UA 2136)Airbus
      • United Airlines (UA 1381)
        • -
        • -
        • -
        • -
        • -
        • S
        • -
      • 23:59 ORD
        21:36 IAD
        9Hrs, 54m 1 Stop (SEA)
      • ORDChicago O'Hare International Airport 23:59 - IAD 21:36 9h 54m 1 Stop (SEA) Seattle
      • ORDChicago O'Hare International Airport 23:59
        BOSBoston Logan International Airport 19:49
      • SEASeattle/Tacoma International Airport 02:43
        IADWashington Dulles International Airport 21:36
      • 9h 54m (1h 19m)
      • 1 Stop SEA · Seattle 1h 19m
      • United Airlines (UA 1381)Airbus
        United Airlines (UA 2136)Boeing 737 800
      • United Airlines (UA 1381)
        • -
        • -
        • -
        • -
        • -
        • -
        • S
      • 20:27 BOS
        02:05 SEA
        8Hrs, 38m 1 Stop (DEN)
      • BOSBoston Logan International Airport 20:27 - SEA 02:05 8h 38m 1 Stop (DEN) Denver
      • BOSBoston Logan International Airport 20:27
        DENDenver Intl Airport 23:59
      • DENDenver Intl Airport 23:15
        SEASeattle/Tacoma International Airport 02:05
      • 8h 38m (44m)
      • 1 Stop DEN · Denver 44m
      • United Airlines (UA 2413)Boeing 737 900
        United Airlines (UA 2656)Boeing 737 800
      • United Airlines (UA 2413)
        • -
        • -
        • -
        • -
        • -
        • -
        • S
      • 20:27 BOS
        02:05 SEA
        8Hrs, 38m 1 Stop (DEN)
      • BOSBoston Logan International Airport 20:27 - SEA 02:05 8h 38m 1 Stop (DEN) Denver
      • BOSBoston Logan International Airport 20:27
        DENDenver Intl Airport 23:59
      • DENDenver Intl Airport 23:13
        SEASeattle/Tacoma International Airport 02:05
      • 8h 38m (46m)
      • 1 Stop DEN · Denver 46m
      • United Airlines (UA 2413)Boeing 737 900
        United Airlines (UA 2656)Boeing 737 900
      • United Airlines (UA 2413)
        • -
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        • -
        • -
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        • S
        • -
      • 20:32 BOS
        02:43 SEA
        9Hrs, 11m 1 Stop (ORD)
      • BOSBoston Logan International Airport 20:32 - SEA 02:43 9h 11m 1 Stop (ORD) Chicago
      • BOSBoston Logan International Airport 20:32
        ORDChicago O'Hare International Airport 23:59
      • ORDChicago O'Hare International Airport 22:28
        SEASeattle/Tacoma International Airport 02:43
      • 9h 11m (1h 31m)
      • 1 Stop ORD · Chicago 1h 31m
      • United Airlines (UA 1783)Boeing 757 200 Series
        United Airlines (UA 1381)Airbus
      • United Airlines (UA 1783)
        • -
        • -
        • -
        • -
        • -
        • -
        • S
      • 20:32 BOS
        02:45 SEA
        9Hrs, 13m 1 Stop (ORD)
      • BOSBoston Logan International Airport 20:32 - SEA 02:45 9h 13m 1 Stop (ORD) Chicago
      • BOSBoston Logan International Airport 20:32
        ORDChicago O'Hare International Airport 23:59
      • ORDChicago O'Hare International Airport 22:28
        SEASeattle/Tacoma International Airport 02:45
      • 9h 13m (1h 31m)
      • 1 Stop ORD · Chicago 1h 31m
      • United Airlines (UA 1783)Boeing 757 200 Series
        United Airlines (UA 1381)Airbus
      • United Airlines (UA 1783)
        • -
        • -
        • -
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      • 05:15 BOS
        12:40 SEA
        10Hrs, 25m 1 Stop (ORD)
      • BOSBoston Logan International Airport 05:15 - SEA 12:40 10h 25m 1 Stop (ORD) Chicago
      • BOSBoston Logan International Airport 05:15
        ORDChicago O'Hare International Airport 09:55
      • ORDChicago O'Hare International Airport 07:17
        SEASeattle/Tacoma International Airport 12:40
      • 10h 25m (2h 38m)
      • 1 Stop ORD · Chicago 2h 38m
      • American Airlines (AA 3452)Embraer Emb 175
        American Airlines (AA 2398)Boeing 737 800
      • American Airlines (AA 3452)
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      • 05:20 BOS
        12:59 SEA
        10Hrs, 39m 1 Stop (CLT)
      • BOSBoston Logan International Airport 05:20 - SEA 12:59 10h 39m 1 Stop (CLT) Charlotte
      • BOSBoston Logan International Airport 05:20
        CLTCharlotte Airport 10:10
      • CLTCharlotte Airport 07:57
        SEASeattle/Tacoma International Airport 12:59
      • 10h 39m (2h 13m)
      • 1 Stop CLT · Charlotte 2h 13m
      • American Airlines (AA 624)Boeing 737 800
        American Airlines (AA 2407)Airbus
      • American Airlines (AA 624)
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      • 05:31 BOS
        13:10 SEA
        10Hrs, 39m 1 Stop (DFW)
      • BOSBoston Logan International Airport 05:31 - SEA 13:10 10h 39m 1 Stop (DFW) Dallas
      • BOSBoston Logan International Airport 05:31
        DFWDallas/Fort Worth Intl Airport 10:27
      • DFWDallas/Fort Worth Intl Airport 09:13
        SEASeattle/Tacoma International Airport 13:10
      • 10h 39m (1h 14m)
      • 1 Stop DFW · Dallas 1h 14m
      • American Airlines (AA 2527)Boeing 737 800
        American Airlines (AA 1992)Airbus
      • American Airlines (AA 2527)
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      • 05:40 BOS
        11:35 SEA
        8Hrs, 55m 1 Stop (IAD)
      • BOSBoston Logan International Airport 05:40 - SEA 11:35 8h 55m 1 Stop (IAD) Washington
      • BOSBoston Logan International Airport 05:40
        IADWashington Dulles International Airport 08:35
      • IADWashington Dulles International Airport 07:24
        SEASeattle/Tacoma International Airport 11:35
      • 8h 55m (1h 11m)
      • 1 Stop IAD · Washington 1h 11m
      • United Airlines (UA 1734)Airbus
        United Airlines (UA 1964)Boeing 737 700
      • United Airlines (UA 1734)
        • -
        • -
        • -
        • -
        • F
        • -
        • -
      • 05:45 BOS
        11:35 SEA
        8Hrs, 50m 1 Stop (IAD)
      • BOSBoston Logan International Airport 05:45 - SEA 11:35 8h 50m 1 Stop (IAD) Washington
      • BOSBoston Logan International Airport 05:45
        IADWashington Dulles International Airport 08:35
      • IADWashington Dulles International Airport 07:29
        SEASeattle/Tacoma International Airport 11:35
      • 8h 50m (1h 06m)
      • 1 Stop IAD · Washington 1h 06m
      • United Airlines (UA 1734)Airbus
        United Airlines (UA 1964)Boeing 737 800
      • United Airlines (UA 1734)
        • -
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        • -
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        • -
        • -
        • -
      • 05:45 BOS
        11:35 SEA
        8Hrs, 50m 1 Stop (IAD)
      • BOSBoston Logan International Airport 05:45 - SEA 11:35 8h 50m 1 Stop (IAD) Washington
      • BOSBoston Logan International Airport 05:45
        IADWashington Dulles International Airport 08:35
      • IADWashington Dulles International Airport 07:29
        SEASeattle/Tacoma International Airport 11:35
      • 8h 50m (1h 06m)
      • 1 Stop IAD · Washington 1h 06m
      • United Airlines (UA 1734)Airbus
        United Airlines (UA 1964)Boeing 737 700
      • United Airlines (UA 1734)
        • M
        • -
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        • -
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        • S
        • S
      • 05:45 BOS
        11:35 SEA
        8Hrs, 50m 1 Stop (IAD)
      • BOSBoston Logan International Airport 05:45 - SEA 11:35 8h 50m 1 Stop (IAD) Washington
      • BOSBoston Logan International Airport 05:45
        IADWashington Dulles International Airport 08:35
      • IADWashington Dulles International Airport 07:29
        SEASeattle/Tacoma International Airport 11:35
      • 8h 50m (1h 06m)
      • 1 Stop IAD · Washington 1h 06m
      • United Airlines (UA 1734)Airbus
        United Airlines (UA 1964)Boeing 737 900
      • United Airlines (UA 1734)
        • -
        • -
        • -
        • T
        • -
        • -
        • -
      • 05:45 BOS
        11:35 SEA
        8Hrs, 50m 1 Stop (DEN)
      • BOSBoston Logan International Airport 05:45 - SEA 11:35 8h 50m 1 Stop (DEN) Denver
      • BOSBoston Logan International Airport 05:45
        DENDenver Intl Airport 09:35
      • DENDenver Intl Airport 08:35
        SEASeattle/Tacoma International Airport 11:35
      • 8h 50m (1h)
      • 1 Stop DEN · Denver 1h
      • Southwest Airlines (WN 851)Boeing 737 Max 8 Passenger
        Southwest Airlines (WN 964)Boeing 737 Max 8 Passenger
      • Southwest Airlines (WN 851)
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      • 05:50 BOS
        13:00 SEA
        10Hrs, 10m 1 Stop (DEN)
      • BOSBoston Logan International Airport 05:50 - SEA 13:00 10h 10m 1 Stop (DEN) Denver
      • BOSBoston Logan International Airport 05:50
        DENDenver Intl Airport 11:00
      • DENDenver Intl Airport 08:45
        SEASeattle/Tacoma International Airport 13:00
      • 10h 10m (2h 15m)
      • 1 Stop DEN · Denver 2h 15m
      • Southwest Airlines (WN 1304)Boeing 737 Max 8 Passenger
        Southwest Airlines (WN 1061)Boeing 737 Max 8 Passenger
      • Southwest Airlines (WN 1304)
        • -
        • -
        • -
        • -
        • -
        • S
        • -
      • 06:00 BOS
        11:33 SEA
        8Hrs, 33m 1 Stop (ORD)
      • BOSBoston Logan International Airport 06:00 - SEA 11:33 8h 33m 1 Stop (ORD) Chicago
      • BOSBoston Logan International Airport 06:00
        ORDChicago O'Hare International Airport 08:45
      • ORDChicago O'Hare International Airport 07:56
        SEASeattle/Tacoma International Airport 11:33
      • 8h 33m (49m)
      • 1 Stop ORD · Chicago 49m
      • United Airlines (UA 1414)Airbus A321 Neo
        United Airlines (UA 2005)Airbus
      • United Airlines (UA 1414)
        • -
        • -
        • -
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        • -
        • -
        • -
      • 06:00 BOS
        12:08 SEA
        9Hrs, 08m 1 Stop (ORD)
      • BOSBoston Logan International Airport 06:00 - SEA 12:08 9h 08m 1 Stop (ORD) Chicago
      • BOSBoston Logan International Airport 06:00
        ORDChicago O'Hare International Airport 09:20
      • ORDChicago O'Hare International Airport 07:56
        SEASeattle/Tacoma International Airport 12:08
      • 9h 08m (1h 24m)
      • 1 Stop ORD · Chicago 1h 24m
      • United Airlines (UA 1414)Airbus A321 Neo
        United Airlines (UA 2005)Airbus
      • United Airlines (UA 1414)
        • -
        • -
        • -
        • -
        • -
        • S
        • -
      • 06:00 BOS
        12:08 SEA
        9Hrs, 08m 1 Stop (ORD)
      • BOSBoston Logan International Airport 06:00 - SEA 12:08 9h 08m 1 Stop (ORD) Chicago
      • BOSBoston Logan International Airport 06:00
        ORDChicago O'Hare International Airport 09:20
      • ORDChicago O'Hare International Airport 07:56
        SEASeattle/Tacoma International Airport 12:08
      • 9h 08m (1h 24m)
      • 1 Stop ORD · Chicago 1h 24m
      • United Airlines (UA 1414)Boeing 737 900
        United Airlines (UA 2005)Boeing 737 800
      • United Airlines (UA 1414)
        • -
        • -
        • -
        • -
        • -
        • -
        • S
      • 06:00 BOS
        12:08 SEA
        9Hrs, 08m 1 Stop (ORD)
      • BOSBoston Logan International Airport 06:00 - SEA 12:08 9h 08m 1 Stop (ORD) Chicago
      • BOSBoston Logan International Airport 06:00
        ORDChicago O'Hare International Airport 09:20
      • ORDChicago O'Hare International Airport 07:56
        SEASeattle/Tacoma International Airport 12:08
      • 9h 08m (1h 24m)
      • 1 Stop ORD · Chicago 1h 24m
      • United Airlines (UA 1414)Boeing 737 900
        United Airlines (UA 2005)Boeing 737 900
      • United Airlines (UA 1414)
        • -
        • -
        • W
        • -
        • -
        • -
        • -
      • 06:00 BOS
        12:08 SEA
        9Hrs, 08m 1 Stop (ORD)
      • BOSBoston Logan International Airport 06:00 - SEA 12:08 9h 08m 1 Stop (ORD) Chicago
      • BOSBoston Logan International Airport 06:00
        ORDChicago O'Hare International Airport 09:20
      • ORDChicago O'Hare International Airport 07:56
        SEASeattle/Tacoma International Airport 12:08
      • 9h 08m (1h 24m)
      • 1 Stop ORD · Chicago 1h 24m
      • United Airlines (UA 1414)Airbus A321 Neo
        United Airlines (UA 2005)Airbus
      • United Airlines (UA 1414)
        • M
        • -
        • -
        • -
        • -
        • -
        • -
      • 06:00 BOS
        12:08 SEA
        9Hrs, 08m 1 Stop (ORD)
      • BOSBoston Logan International Airport 06:00 - SEA 12:08 9h 08m 1 Stop (ORD) Chicago
      • BOSBoston Logan International Airport 06:00
        ORDChicago O'Hare International Airport 09:20
      • ORDChicago O'Hare International Airport 07:56
        SEASeattle/Tacoma International Airport 12:08
      • 9h 08m (1h 24m)
      • 1 Stop ORD · Chicago 1h 24m
      • United Airlines (UA 1414)Airbus A321 Neo
        United Airlines (UA 2005)Boeing 737 800
      • United Airlines (UA 1414)
        • -
        • T
        • -
        • -
        • -
        • -
        • -
      • 06:00 BOS
        12:49 SEA
        9Hrs, 49m 1 Stop (SFO)
      • BOSBoston Logan International Airport 06:00 - SEA 12:49 9h 49m 1 Stop (SFO) San Francisco
      • BOSBoston Logan International Airport 06:00
        SFOSan Francisco International Airport 10:35
      • SFOSan Francisco International Airport 09:45
        SEASeattle/Tacoma International Airport 12:49
      • 9h 49m (50m)
      • 1 Stop SFO · San Francisco 50m
      • United Airlines (UA 2441)Boeing 757 200 Series
        United Airlines (UA 2315)Boeing 737 900
      • United Airlines (UA 2441)
        • -
        • -
        • W
        • -
        • -
        • -
        • -
      • 06:00 BOS
        12:53 SEA
        9Hrs, 53m 1 Stop (SFO)
      • BOSBoston Logan International Airport 06:00 - SEA 12:53 9h 53m 1 Stop (SFO) San Francisco
      • BOSBoston Logan International Airport 06:00
        SFOSan Francisco International Airport 10:35
      • SFOSan Francisco International Airport 09:45
        SEASeattle/Tacoma International Airport 12:53
      • 9h 53m (50m)
      • 1 Stop SFO · San Francisco 50m
      • United Airlines (UA 2441)Boeing 757 200 Series
        United Airlines (UA 2315)Boeing 737 800
      • United Airlines (UA 2441)
        • M
        • T
        • -
        • T
        • F
        • S
        • -
      • 06:00 BOS
        12:53 SEA
        9Hrs, 53m 1 Stop (SFO)
      • BOSBoston Logan International Airport 06:00 - SEA 12:53 9h 53m 1 Stop (SFO) San Francisco
      • BOSBoston Logan International Airport 06:00
        SFOSan Francisco International Airport 10:35
      • SFOSan Francisco International Airport 09:45
        SEASeattle/Tacoma International Airport 12:53
      • 9h 53m (50m)
      • 1 Stop SFO · San Francisco 50m
      • United Airlines (UA 2441)Boeing 757 200 Series
        United Airlines (UA 2315)Boeing 737 Max 8 Passenger
      • United Airlines (UA 2441)
        • -
        • -
        • -
        • -
        • -
        • -
        • S
      • 06:00 BOS
        13:43 SEA
        10Hrs, 43m 1 Stop (LAX)
      • BOSBoston Logan International Airport 06:00 - SEA 13:43 10h 43m 1 Stop (LAX) Los Angeles
      • BOSBoston Logan International Airport 06:00
        LAXLos Angeles International Airport 10:45
      • LAXLos Angeles International Airport 09:36
        SEASeattle/Tacoma International Airport 13:43
      • 10h 43m (1h 09m)
      • 1 Stop LAX · Los Angeles 1h 09m
      • United Airlines (UA 217)Boeing 737 Max 9 Passenger
        United Airlines (UA 262)Boeing 737 Max 9 Passenger
      • United Airlines (UA 217)
        • M
        • T
        • W
        • T
        • F
        • -
        • -
      • 06:30 BOS
        15:31 SEA
        12Hrs, 01m 1 Stop (PHX)
      • BOSBoston Logan International Airport 06:30 - SEA 15:31 12h 01m 1 Stop (PHX) Phoenix
      • BOSBoston Logan International Airport 06:30
        PHXPhoenix Sky Harbor Intl Airport 13:20
      • PHXPhoenix Sky Harbor Intl Airport 10:32
        SEASeattle/Tacoma International Airport 15:31
      • 12h 01m (2h 48m)
      • 1 Stop PHX · Phoenix 2h 48m
      • American Airlines (AA 2315)Airbus A321 Neo
        Alaska Airlines (AS 651)Boeing 737 800
      • American Airlines (AA 2315)
        • -
        • -
        • -
        • T
        • -
        • -
        • -
      • 06:30 BOS
        14:11 SEA
        10Hrs, 41m 1 Stop (PHX)
      • BOSBoston Logan International Airport 06:30 - SEA 14:11 10h 41m 1 Stop (PHX) Phoenix
      • BOSBoston Logan International Airport 06:30
        PHXPhoenix Sky Harbor Intl Airport 11:34
      • PHXPhoenix Sky Harbor Intl Airport 10:32
        SEASeattle/Tacoma International Airport 14:11
      • 10h 41m (1h 02m)
      • 1 Stop PHX · Phoenix 1h 02m
      • American Airlines (AA 2315)Airbus A321 Neo
        American Airlines (AA 6253)Crj 700 Canadair Regional
      • American Airlines (AA 2315)
        • M
        • T
        • W
        • -
        • F
        • S
        • S
      • 06:30 BOS
        14:21 SEA
        10Hrs, 51m 1 Stop (PHX)
      • BOSBoston Logan International Airport 06:30 - SEA 14:21 10h 51m 1 Stop (PHX) Phoenix
      • BOSBoston Logan International Airport 06:30
        PHXPhoenix Sky Harbor Intl Airport 11:50
      • PHXPhoenix Sky Harbor Intl Airport 10:32
        SEASeattle/Tacoma International Airport 14:21
      • 10h 51m (1h 18m)
      • 1 Stop PHX · Phoenix 1h 18m
      • American Airlines (AA 2315)Airbus A321 Neo
        American Airlines (AA 6253)Crj 700 Canadair Regional
      • American Airlines (AA 2315)
        • -
        • -
        • -
        • T
        • -
        • -
        • -
      • 06:40 BOS
        12:25 SEA
        8Hrs, 45m 1 Stop (MDW)
      • BOSBoston Logan International Airport 06:40 - SEA 12:25 8h 45m 1 Stop (MDW) Chicago
      • BOSBoston Logan International Airport 06:40
        MDWChicago Midway Airport 09:45
      • MDWChicago Midway Airport 08:25
        SEASeattle/Tacoma International Airport 12:25
      • 8h 45m (1h 20m)
      • 1 Stop MDW · Chicago 1h 20m
      • Southwest Airlines (WN 787)Boeing 737 Max 8 Passenger
        Southwest Airlines (WN 1048)Boeing 737 700
      • Southwest Airlines (WN 787)
        • M
        • -
        • -
        • -
        • -
        • -
        • -
      • 06:41 BOS
        12:59 SEA
        9Hrs, 18m 1 Stop (CLT)
      • BOSBoston Logan International Airport 06:41 - SEA 12:59 9h 18m 1 Stop (CLT) Charlotte
      • BOSBoston Logan International Airport 06:41
        CLTCharlotte Airport 10:10
      • CLTCharlotte Airport 09:15
        SEASeattle/Tacoma International Airport 12:59
      • 9h 18m (55m)
      • 1 Stop CLT · Charlotte 55m
      • American Airlines (AA 1793)Airbus
        American Airlines (AA 2407)Airbus
      • American Airlines (AA 1793)
        • M
        • T
        • W
        • T
        • F
        • S
        • S
      • 07:00 BOS
        12:25 SEA
        8Hrs, 25m 1 Stop (MDW)
      • BOSBoston Logan International Airport 07:00 - SEA 12:25 8h 25m 1 Stop (MDW) Chicago
      • BOSBoston Logan International Airport 07:00
        MDWChicago Midway Airport 09:45
      • MDWChicago Midway Airport 08:45
        SEASeattle/Tacoma International Airport 12:25
      • 8h 25m (1h)
      • 1 Stop MDW · Chicago 1h
      • Southwest Airlines (WN 787)Boeing 737 Max 8 Passenger
        Southwest Airlines (WN 4350)Boeing 737 Max 8 Passenger
      • Southwest Airlines (WN 787)
        • -
        • -
        • -
        • -
        • F
        • -
        • -
      • 07:00 BOS
        14:55 SEA
        10Hrs, 55m 1 Stop (DFW)
      • BOSBoston Logan International Airport 07:00 - SEA 14:55 10h 55m 1 Stop (DFW) Dallas
      • BOSBoston Logan International Airport 07:00
        DFWDallas/Fort Worth Intl Airport 12:26
      • DFWDallas/Fort Worth Intl Airport 10:59
        SEASeattle/Tacoma International Airport 14:55
      • 10h 55m (1h 27m)
      • 1 Stop DFW · Dallas 1h 27m
      • American Airlines (AA 858)Boeing 737 800
        American Airlines (AA 2405)Airbus
      • American Airlines (AA 858)
        • -
        • -
        • -
        • T
        • -
        • -
        • -
      • 07:07 BOS
        12:58 SEA
        8Hrs, 51m 1 Stop (PDX)
      • BOSBoston Logan International Airport 07:07 - SEA 12:58 8h 51m 1 Stop (PDX) Portland
      • BOSBoston Logan International Airport 07:07
        PDXPortland Airport 11:50
      • PDXPortland Airport 10:20
        SEASeattle/Tacoma International Airport 12:58
      • 8h 51m (1h 30m)
      • 1 Stop PDX · Portland 1h 30m
      • Alaska Airlines (AS 317)Boeing 737 800
        Alaska Airlines (AS 970)Boeing 737
      • Alaska Airlines (AS 317)
        • M
        • -
        • -
        • -
        • -
        • -
        • -
      • 07:07 BOS
        12:58 SEA
        8Hrs, 51m 1 Stop (PDX)
      • BOSBoston Logan International Airport 07:07 - SEA 12:58 8h 51m 1 Stop (PDX) Portland
      • BOSBoston Logan International Airport 07:07
        PDXPortland Airport 11:50
      • PDXPortland Airport 10:20
        SEASeattle/Tacoma International Airport 12:58
      • 8h 51m (1h 30m)
      • 1 Stop PDX · Portland 1h 30m
      • Alaska Airlines (AS 317)Boeing 737
        Alaska Airlines (AS 970)Boeing 737 800
      • Alaska Airlines (AS 317)
        • -
        • -
        • -
        • -
        • F
        • S
        • -
      • 07:07 BOS
        12:58 SEA
        8Hrs, 51m 1 Stop (PDX)
      • BOSBoston Logan International Airport 07:07 - SEA 12:58 8h 51m 1 Stop (PDX) Portland
      • BOSBoston Logan International Airport 07:07
        PDXPortland Airport 11:50
      • PDXPortland Airport 10:20
        SEASeattle/Tacoma International Airport 12:58
      • 8h 51m (1h 30m)
      • 1 Stop PDX · Portland 1h 30m
      • Alaska Airlines (AS 317)Boeing 737 800
        Alaska Airlines (AS 970)Boeing 737 800
      • Alaska Airlines (AS 317)
        • -
        • -
        • -
        • T
        • -
        • -
        • -
      • 07:07 BOS
        12:58 SEA
        8Hrs, 51m 1 Stop (PDX)
      • BOSBoston Logan International Airport 07:07 - SEA 12:58 8h 51m 1 Stop (PDX) Portland
      • BOSBoston Logan International Airport 07:07
        PDXPortland Airport 11:50
      • PDXPortland Airport 10:20
        SEASeattle/Tacoma International Airport 12:58
      • 8h 51m (1h 30m)
      • 1 Stop PDX · Portland 1h 30m
      • Alaska Airlines (AS 317)Boeing 737 Max 9 Passenger
        Alaska Airlines (AS 970)Boeing 737
      • Alaska Airlines (AS 317)
        • -
        • -
        • W
        • -
        • -
        • -
        • -
      • 07:07 BOS
        12:58 SEA
        8Hrs, 51m 1 Stop (PDX)
      • BOSBoston Logan International Airport 07:07 - SEA 12:58 8h 51m 1 Stop (PDX) Portland
      • BOSBoston Logan International Airport 07:07
        PDXPortland Airport 11:50
      • PDXPortland Airport 10:20
        SEASeattle/Tacoma International Airport 12:58
      • 8h 51m (1h 30m)
      • 1 Stop PDX · Portland 1h 30m
      • Alaska Airlines (AS 317)Boeing 737 800
        Alaska Airlines (AS 970)Boeing 737 Max 9 Passenger
      • Alaska Airlines (AS 317)
        • -
        • T
        • -
        • -
        • -
        • -
        • -
      • 07:07 BOS
        14:34 SEA
        10Hrs, 27m 1 Stop (PDX)
      • BOSBoston Logan International Airport 07:07 - SEA 14:34 10h 27m 1 Stop (PDX) Portland
      • BOSBoston Logan International Airport 07:07
        PDXPortland Airport 13:34
      • PDXPortland Airport 10:20
        SEASeattle/Tacoma International Airport 14:34
      • 10h 27m (3h 14m)
      • 1 Stop PDX · Portland 3h 14m
      • Alaska Airlines (AS 317)Boeing 737 800
        Alaska Airlines (AS 2119)Embraer Emb 175
      • Alaska Airlines (AS 317)
        • -
        • -
        • -
        • T
        • -
        • -
        • -
      • 07:07 BOS
        14:42 SEA
        10Hrs, 35m 1 Stop (PDX)
      • BOSBoston Logan International Airport 07:07 - SEA 14:42 10h 35m 1 Stop (PDX) Portland
      • BOSBoston Logan International Airport 07:07
        PDXPortland Airport 13:34
      • PDXPortland Airport 10:20
        SEASeattle/Tacoma International Airport 14:42
      • 10h 35m (3h 14m)
      • 1 Stop PDX · Portland 3h 14m
      • Alaska Airlines (AS 317)Boeing 737
        Alaska Airlines (AS 1008)Boeing 737 800
      • Alaska Airlines (AS 317)
        • -
        • -
        • -
        • -
        • F
        • -
        • -
      • 07:07 BOS
        14:42 SEA
        10Hrs, 35m 1 Stop (PDX)
      • BOSBoston Logan International Airport 07:07 - SEA 14:42 10h 35m 1 Stop (PDX) Portland
      • BOSBoston Logan International Airport 07:07
        PDXPortland Airport 13:34
      • PDXPortland Airport 10:20
        SEASeattle/Tacoma International Airport 14:42
      • 10h 35m (3h 14m)
      • 1 Stop PDX · Portland 3h 14m
      • Alaska Airlines (AS 317)Boeing 737 Max 9 Passenger
        Alaska Airlines (AS 1008)Boeing 737 800
      • Alaska Airlines (AS 317)
        • -
        • -
        • W
        • -
        • -
        • -
        • -
      • 07:07 BOS
        14:42 SEA
        10Hrs, 35m 1 Stop (PDX)
      • BOSBoston Logan International Airport 07:07 - SEA 14:42 10h 35m 1 Stop (PDX) Portland
      • BOSBoston Logan International Airport 07:07
        PDXPortland Airport 13:34
      • PDXPortland Airport 10:20
        SEASeattle/Tacoma International Airport 14:42
      • 10h 35m (3h 14m)
      • 1 Stop PDX · Portland 3h 14m
      • Alaska Airlines (AS 317)Boeing 737 800
        Alaska Airlines (AS 1008)Boeing 737 800
      • Alaska Airlines (AS 317)
        • M
        • T
        • -
        • -
        • -
        • -
        • -
      • 07:24 BOS
        13:57 SEA
        9Hrs, 33m 1 Stop (DEN)
      • BOSBoston Logan International Airport 07:24 - SEA 13:57 9h 33m 1 Stop (DEN) Denver
      • BOSBoston Logan International Airport 07:24
        DENDenver Intl Airport 11:50
      • DENDenver Intl Airport 10:15
        SEASeattle/Tacoma International Airport 13:57
      • 9h 33m (1h 35m)
      • 1 Stop DEN · Denver 1h 35m
      • United Airlines (UA 647)Boeing 737 Max 9 Passenger
        United Airlines (UA 423)Airbus
      • United Airlines (UA 647)
        • -
        • -
        • W
        • T
        • -
        • -
        • -
      • 07:24 BOS
        13:57 SEA
        9Hrs, 33m 1 Stop (DEN)
      • BOSBoston Logan International Airport 07:24 - SEA 13:57 9h 33m 1 Stop (DEN) Denver
      • BOSBoston Logan International Airport 07:24
        DENDenver Intl Airport 11:50
      • DENDenver Intl Airport 10:15
        SEASeattle/Tacoma International Airport 13:57
      • 9h 33m (1h 35m)
      • 1 Stop DEN · Denver 1h 35m
      • United Airlines (UA 647)Boeing 737 900
        United Airlines (UA 423)Boeing 737 Max 8 Passenger
      • United Airlines (UA 647)
        • -
        • -
        • -
        • -
        • F
        • -
        • -
      • 07:24 BOS
        13:57 SEA
        9Hrs, 33m 1 Stop (DEN)
      • BOSBoston Logan International Airport 07:24 - SEA 13:57 9h 33m 1 Stop (DEN) Denver
      • BOSBoston Logan International Airport 07:24
        DENDenver Intl Airport 11:50
      • DENDenver Intl Airport 10:15
        SEASeattle/Tacoma International Airport 13:57
      • 9h 33m (1h 35m)
      • 1 Stop DEN · Denver 1h 35m
      • United Airlines (UA 647)Boeing 737 Max 9 Passenger
        United Airlines (UA 423)Boeing 737 Max 8 Passenger
      • United Airlines (UA 647)
        • M
        • T
        • -
        • -
        • -
        • -
        • S
      • 07:25 BOS
        14:55 SEA
        10Hrs, 30m 1 Stop (DFW)
      • BOSBoston Logan International Airport 07:25 - SEA 14:55 10h 30m 1 Stop (DFW) Dallas
      • BOSBoston Logan International Airport 07:25
        DFWDallas/Fort Worth Intl Airport 12:26
      • DFWDallas/Fort Worth Intl Airport 11:13
        SEASeattle/Tacoma International Airport 14:55
      • 10h 30m (1h 13m)
      • 1 Stop DFW · Dallas 1h 13m
      • American Airlines (AA 858)Boeing 737 800
        American Airlines (AA 2405)Airbus
      • American Airlines (AA 858)
        • M
        • T
        • W
        • -
        • -
        • S
        • S
      • 07:40 BOS
        15:35 SEA
        10Hrs, 55m 1 Stop (DEN)
      • BOSBoston Logan International Airport 07:40 - SEA 15:35 10h 55m 1 Stop (DEN) Denver
      • BOSBoston Logan International Airport 07:40
        DENDenver Intl Airport 13:35
      • DENDenver Intl Airport 10:30
        SEASeattle/Tacoma International Airport 15:35
      • 10h 55m (3h 05m)
      • 1 Stop DEN · Denver 3h 05m
      • Southwest Airlines (WN 1304)Boeing 737 800
        Southwest Airlines (WN 3022)Boeing 737 800
      • Southwest Airlines (WN 1304)
        • -
        • -
        • -
        • T
        • -
        • -
        • -
      • 07:50 BOS
        14:55 SEA
        10Hrs, 05m 1 Stop (DFW)
      • BOSBoston Logan International Airport 07:50 - SEA 14:55 10h 05m 1 Stop (DFW) Dallas
      • BOSBoston Logan International Airport 07:50
        DFWDallas/Fort Worth Intl Airport 12:26
      • DFWDallas/Fort Worth Intl Airport 11:37
        SEASeattle/Tacoma International Airport 14:55
      • 10h 05m (49m)
      • 1 Stop DFW · Dallas 49m
      • American Airlines (AA 2997)Airbus
        American Airlines (AA 2405)Airbus
      • American Airlines (AA 2997)
        • -
        • -
        • -
        • T
        • -
        • -
        • -
      • 08:00 BOS
        15:29 SEA
        10Hrs, 29m 1 Stop (SFO)
      • BOSBoston Logan International Airport 08:00 - SEA 15:29 10h 29m 1 Stop (SFO) San Francisco
      • BOSBoston Logan International Airport 08:00
        SFOSan Francisco International Airport 13:15
      • SFOSan Francisco International Airport 11:50
        SEASeattle/Tacoma International Airport 15:29
      • 10h 29m (1h 25m)
      • 1 Stop SFO · San Francisco 1h 25m
      • United Airlines (UA 1008)Boeing 757 200 Series
        United Airlines (UA 2650)Boeing 737 900
      • United Airlines (UA 1008)
        • -
        • -
        • W
        • -
        • -
        • -
        • -
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      What’s the fastest flight time from Boston to Seattle?

      The fastest flight time for direct flights from Boston to Seattle is 6 hours 23 minutes. Check latest flight schedules & prices on Wego.

      What’s the most popular airline flying from Boston to Seattle?

      The most popular airline flying from Boston to Seattle is Alaska Airlines. Find the latest flight deals on Wego.

      How far is Seattle from Boston?

      The flight distance between Boston and Seattle is 4000km. Check all available flights on Wego.

      When is the earliest and latest flight of the day?

      The earliest flight of the day departs at 05:15. The last flight of the day departs at 19:10. See the full list of flight times on Wego.

      How many airlines offer direct flights from Boston to Seattle?

      There are 3 airlines that offer direct flights from Boston to Seattle. Find out the list of airlines on Wego.

      All Airports in Boston

      Boston Logan International Airport BOS

      Popular Airlines flying from Boston to Seattle

      Alaska Airlines ‏()
      JetBlue Airways ‏()

      Popular Destinations from Seattle

      Popular Destinations from Boston

      Popular Hotels in Seattle

      Hotels In Popular Destinations