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Route overview: Boston to Seattle (SEA) flight deals

Boston → Seattle

Dec 8, 2026 · choose your return date

BOS → SEA1 adulteconomyOne way and round trips

30 flight options · 3 airlines

Choose your return date

One-way flights and round trips by duration. Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

December 2026

Dec 8, 2026 · One waySouthwest AirlinesUp to 1 stop each way$190.00 Dec 8, 2026 · One wayAlaska AirlinesNonstop$215.00 Dec 8, 2026 – Dec 9, 2026 · 1 nightSouthwest Airlines / Alaska AirlinesUp to 1 stop each way$385.00 Dec 8, 2026 – Dec 9, 2026 · 1 nightAlaska AirlinesNonstop$410.00 Dec 8, 2026 – Dec 10, 2026 · 2 nightsSouthwest Airlines / Alaska AirlinesUp to 1 stop each way$385.00 Dec 8, 2026 – Dec 10, 2026 · 2 nightsAlaska AirlinesNonstop$410.00 Dec 8, 2026 – Dec 11, 2026 · 3 nightsSouthwest Airlines / Delta Air LinesUp to 1 stop each way$392.50 Dec 8, 2026 – Dec 11, 2026 · 3 nightsAlaska AirlinesNonstop$410.00 Dec 8, 2026 – Dec 12, 2026 · 4 nightsSouthwest Airlines / Delta Air LinesUp to 1 stop each way$392.50 Dec 8, 2026 – Dec 12, 2026 · 4 nightsAlaska AirlinesNonstop$410.00 Dec 8, 2026 – Dec 13, 2026 · 5 nightsSouthwest Airlines / Delta Air LinesUp to 1 stop each way$392.50 Dec 8, 2026 – Dec 13, 2026 · 5 nightsAlaska AirlinesNonstop$410.00 Dec 8, 2026 – Dec 14, 2026 · 6 nightsSouthwest Airlines / Delta Air LinesUp to 1 stop each way$392.50 Dec 8, 2026 – Dec 14, 2026 · 6 nightsAlaska AirlinesNonstop$410.00 Dec 8, 2026 – Dec 15, 2026 · 7 nightsSouthwest Airlines / Delta Air LinesUp to 1 stop each way$392.50 Dec 8, 2026 – Dec 15, 2026 · 7 nightsAlaska AirlinesNonstop$410.00 Dec 8, 2026 – Dec 16, 2026 · 8 nightsSouthwest Airlines / Alaska AirlinesUp to 1 stop each way$385.00 Dec 8, 2026 – Dec 16, 2026 · 8 nightsAlaska AirlinesNonstop$410.00 Dec 8, 2026 – Dec 17, 2026 · 9 nightsSouthwest Airlines / Alaska AirlinesUp to 1 stop each way$385.00 Dec 8, 2026 – Dec 17, 2026 · 9 nightsAlaska AirlinesNonstop$410.00 Dec 8, 2026 – Dec 18, 2026 · 10 nightsSouthwest Airlines / Delta Air LinesUp to 1 stop each way$392.50 Dec 8, 2026 – Dec 18, 2026 · 10 nightsAlaska AirlinesNonstop$410.00 Dec 8, 2026 – Dec 19, 2026 · 11 nightsSouthwest Airlines / Delta Air LinesUp to 1 stop each way$477.50 Dec 8, 2026 – Dec 19, 2026 · 11 nightsAlaska AirlinesNonstop$492.00 Dec 8, 2026 – Dec 20, 2026 · 12 nightsSouthwest Airlines / Delta Air LinesUp to 1 stop each way$477.50 Dec 8, 2026 – Dec 20, 2026 · 12 nightsAlaska AirlinesNonstop$492.00 Dec 8, 2026 – Dec 21, 2026 · 13 nightsSouthwest Airlines / Delta Air LinesUp to 1 stop each way$477.50 Dec 8, 2026 – Dec 21, 2026 · 13 nightsAlaska AirlinesNonstop$492.00 Dec 8, 2026 – Dec 22, 2026 · 14 nightsSouthwest Airlines / Delta Air LinesUp to 1 stop each way$477.50 Dec 8, 2026 – Dec 22, 2026 · 14 nightsAlaska AirlinesNonstop$492.00

Flights for your trip

  1. Tue, Dec 8 · One way

    Southwest Airlines
    5:55 pmBOS
    8h 40m
    MDW · 1h 5m
    11:35 pmSEA

    One-way total · 1 adult · Taxes included

  2. Tue, Dec 8 · One way

    Alaska Airlines
    9:03 amBOS
    6h 24m
    Nonstop
    12:27 pmSEA

    One-way total · 1 adult · Taxes included

  3. Tue, Dec 8 – Wed, Dec 9

    Southwest Airlines
    5:55 pmBOS
    8h 40m
    MDW · 1h 5m
    11:35 pmSEA
    Alaska Airlines
    3:40 pmSEA
    5h 19m
    Nonstop
    11:59 pmBOS

    Round-trip total · 1 adult · Taxes included

  4. Tue, Dec 8 – Wed, Dec 9

    Alaska Airlines
    9:03 amBOS
    6h 24m
    Nonstop
    12:27 pmSEA
    Alaska Airlines
    3:40 pmSEA
    5h 19m
    Nonstop
    11:59 pmBOS

    Round-trip total · 1 adult · Taxes included

  5. Tue, Dec 8 – Thu, Dec 10

    Southwest Airlines
    5:55 pmBOS
    8h 40m
    MDW · 1h 5m
    11:35 pmSEA
    Alaska Airlines
    3:40 pmSEA
    5h 19m
    Nonstop
    11:59 pmBOS

    Round-trip total · 1 adult · Taxes included

  6. Tue, Dec 8 – Thu, Dec 10

    Alaska Airlines
    9:03 amBOS
    6h 24m
    Nonstop
    12:27 pmSEA
    Alaska Airlines
    3:40 pmSEA
    5h 19m
    Nonstop
    11:59 pmBOS

    Round-trip total · 1 adult · Taxes included

  7. Tue, Dec 8 – Fri, Dec 11

    Southwest Airlines
    5:55 pmBOS
    8h 40m
    MDW · 1h 5m
    11:35 pmSEA
    Delta Air Lines
    10:33 pmSEA
    5h 18m
    Nonstop
    6:51 am+1BOS

    Round-trip total · 1 adult · Taxes included

  8. Tue, Dec 8 – Fri, Dec 11

    Alaska Airlines
    9:03 amBOS
    6h 24m
    Nonstop
    12:27 pmSEA
    Alaska Airlines
    3:40 pmSEA
    5h 19m
    Nonstop
    11:59 pmBOS

    Round-trip total · 1 adult · Taxes included

  9. Tue, Dec 8 – Sat, Dec 12

    Southwest Airlines
    5:55 pmBOS
    8h 40m
    MDW · 1h 5m
    11:35 pmSEA
    Delta Air Lines
    11:07 pmSEA
    5h 13m
    Nonstop
    7:20 am+1BOS

    Round-trip total · 1 adult · Taxes included

  10. Tue, Dec 8 – Sat, Dec 12

    Alaska Airlines
    9:03 amBOS
    6h 24m
    Nonstop
    12:27 pmSEA
    Alaska Airlines
    11:22 pmSEA
    5h 18m
    Nonstop
    7:40 am+1BOS

    Round-trip total · 1 adult · Taxes included

  11. Tue, Dec 8 – Mon, Dec 14

    Southwest Airlines
    5:55 pmBOS
    8h 40m
    MDW · 1h 5m
    11:35 pmSEA
    Delta Air Lines
    11:45 amSEA
    5h 16m
    Nonstop
    8:01 pmBOS

    Round-trip total · 1 adult · Taxes included

  12. Tue, Dec 8 – Mon, Dec 14

    Alaska Airlines
    9:03 amBOS
    6h 24m
    Nonstop
    12:27 pmSEA
    Alaska Airlines
    9:21 pmSEA
    5h 19m
    Nonstop
    5:40 am+1BOS

    Round-trip total · 1 adult · Taxes included

  13. Tue, Dec 8 – Tue, Dec 15

    Southwest Airlines
    5:55 pmBOS
    8h 40m
    MDW · 1h 5m
    11:35 pmSEA
    Delta Air Lines
    3:45 pmSEA
    5h 9m
    Nonstop
    11:54 pmBOS

    Round-trip total · 1 adult · Taxes included

  14. Tue, Dec 8 – Tue, Dec 15

    Alaska Airlines
    9:03 amBOS
    6h 24m
    Nonstop
    12:27 pmSEA
    Alaska Airlines
    9:21 pmSEA
    5h 19m
    Nonstop
    5:40 am+1BOS

    Round-trip total · 1 adult · Taxes included

  15. Tue, Dec 8 – Wed, Dec 16

    Southwest Airlines
    5:55 pmBOS
    8h 40m
    MDW · 1h 5m
    11:35 pmSEA
    Alaska Airlines
    3:40 pmSEA
    5h 19m
    Nonstop
    11:59 pmBOS

    Round-trip total · 1 adult · Taxes included

  16. Tue, Dec 8 – Wed, Dec 16

    Alaska Airlines
    9:03 amBOS
    6h 24m
    Nonstop
    12:27 pmSEA
    Alaska Airlines
    3:40 pmSEA
    5h 19m
    Nonstop
    11:59 pmBOS

    Round-trip total · 1 adult · Taxes included

  17. Tue, Dec 8 – Fri, Dec 18

    Southwest Airlines
    5:55 pmBOS
    8h 40m
    MDW · 1h 5m
    11:35 pmSEA
    Delta Air Lines
    10:33 pmSEA
    5h 18m
    Nonstop
    6:51 am+1BOS

    Round-trip total · 1 adult · Taxes included

  18. Tue, Dec 8 – Fri, Dec 18

    Alaska Airlines
    9:03 amBOS
    6h 24m
    Nonstop
    12:27 pmSEA
    Alaska Airlines
    3:40 pmSEA
    5h 19m
    Nonstop
    11:59 pmBOS

    Round-trip total · 1 adult · Taxes included

  19. Tue, Dec 8 – Sat, Dec 19

    Southwest Airlines
    5:55 pmBOS
    8h 40m
    MDW · 1h 5m
    11:35 pmSEA
    Delta Air Lines
    11:07 pmSEA
    5h 13m
    Nonstop
    7:20 am+1BOS

    Round-trip total · 1 adult · Taxes included

  20. Tue, Dec 8 – Sat, Dec 19

    Alaska Airlines
    9:03 amBOS
    6h 24m
    Nonstop
    12:27 pmSEA
    Alaska Airlines
    11:22 pmSEA
    5h 18m
    Nonstop
    7:40 am+1BOS

    Round-trip total · 1 adult · Taxes included

  21. Tue, Dec 8 – Sun, Dec 20

    Southwest Airlines
    5:55 pmBOS
    8h 40m
    MDW · 1h 5m
    11:35 pmSEA
    Delta Air Lines
    11:45 amSEA
    5h 14m
    Nonstop
    7:59 pmBOS

    Round-trip total · 1 adult · Taxes included

  22. Tue, Dec 8 – Sun, Dec 20

    Alaska Airlines
    9:03 amBOS
    6h 24m
    Nonstop
    12:27 pmSEA
    Alaska Airlines
    9:21 pmSEA
    5h 19m
    Nonstop
    5:40 am+1BOS

    Round-trip total · 1 adult · Taxes included

  23. Tue, Dec 8 – Tue, Dec 22

    Southwest Airlines
    5:55 pmBOS
    8h 40m
    MDW · 1h 5m
    11:35 pmSEA
    Delta Air Lines
    3:45 pmSEA
    5h 9m
    Nonstop
    11:54 pmBOS

    Round-trip total · 1 adult · Taxes included

  24. Tue, Dec 8 – Tue, Dec 22

    Alaska Airlines
    9:03 amBOS
    6h 24m
    Nonstop
    12:27 pmSEA
    Alaska Airlines
    9:21 pmSEA
    5h 19m
    Nonstop
    5:40 am+1BOS

    Round-trip total · 1 adult · Taxes included

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BOS ⇄ SEA

Economy

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Explore this route

All dates for this routeDec 7, 2026 · Return optionsDec 9, 2026 · Return optionsHotels in Seattle with Axel
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Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

Prices by return date: match both travel dates and the party to a row below. Each total is for that exact trip, issued at the time shown. To book or select flights, follow that row's price link; it keeps the exact dates and travelers.

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-12-08 · one wayAlaska AirlinesAS215Axel-exclusive $215.002026-10-29T00:52:47Z
2026-12-08 · one waySouthwest AirlinesWN816 + WN3032Axel-exclusive $190.002026-10-29T00:52:47Z
2026-12-08 → 2026-12-09Alaska AirlinesAS215 / AS460Axel-exclusive $410.002026-10-29T00:52:47Z
2026-12-08 → 2026-12-09Southwest Airlines / Alaska AirlinesWN816 + WN3032 / AS460Axel-exclusive $385.002026-10-29T00:52:47Z
2026-12-08 → 2026-12-10Alaska AirlinesAS215 / AS460Axel-exclusive $410.002026-10-29T00:52:47Z
2026-12-08 → 2026-12-10Southwest Airlines / Alaska AirlinesWN816 + WN3032 / AS460Axel-exclusive $385.002026-10-29T00:52:47Z
2026-12-08 → 2026-12-11Alaska AirlinesAS215 / AS460Axel-exclusive $410.002026-10-29T00:52:47Z
2026-12-08 → 2026-12-11Southwest Airlines / Delta Air LinesWN816 + WN3032 / DL473Axel-exclusive $392.502026-10-29T00:52:47Z
2026-12-08 → 2026-12-12Alaska AirlinesAS215 / AS214Axel-exclusive $410.002026-10-29T00:52:47Z
2026-12-08 → 2026-12-12Southwest Airlines / Delta Air LinesWN816 + WN3032 / DL473Axel-exclusive $392.502026-10-29T00:52:47Z
2026-12-08 → 2026-12-13Alaska AirlinesAS215 / AS214Axel-exclusive $410.002026-10-29T00:52:47Z
2026-12-08 → 2026-12-13Southwest Airlines / Delta Air LinesWN816 + WN3032 / DL438Axel-exclusive $392.502026-10-29T00:52:47Z
2026-12-08 → 2026-12-14Alaska AirlinesAS215 / AS214Axel-exclusive $410.002026-10-29T00:52:47Z
2026-12-08 → 2026-12-14Southwest Airlines / Delta Air LinesWN816 + WN3032 / DL438Axel-exclusive $392.502026-10-29T00:52:47Z
2026-12-08 → 2026-12-15Alaska AirlinesAS215 / AS214Axel-exclusive $410.002026-10-29T00:52:47Z
2026-12-08 → 2026-12-15Southwest Airlines / Delta Air LinesWN816 + WN3032 / DL474Axel-exclusive $392.502026-10-29T00:52:47Z
2026-12-08 → 2026-12-16Alaska AirlinesAS215 / AS460Axel-exclusive $410.002026-10-29T00:52:47Z
2026-12-08 → 2026-12-16Southwest Airlines / Alaska AirlinesWN816 + WN3032 / AS460Axel-exclusive $385.002026-10-29T00:52:47Z
2026-12-08 → 2026-12-17Alaska AirlinesAS215 / AS460Axel-exclusive $410.002026-10-29T00:52:47Z
2026-12-08 → 2026-12-17Southwest Airlines / Alaska AirlinesWN816 + WN3032 / AS460Axel-exclusive $385.002026-10-29T00:52:47Z
2026-12-08 → 2026-12-18Alaska AirlinesAS215 / AS460Axel-exclusive $410.002026-10-29T00:52:47Z
2026-12-08 → 2026-12-18Southwest Airlines / Delta Air LinesWN816 + WN3032 / DL473Axel-exclusive $392.502026-10-29T00:52:47Z
2026-12-08 → 2026-12-19Alaska AirlinesAS215 / AS214Axel-exclusive $492.002026-10-29T00:52:47Z
2026-12-08 → 2026-12-19Southwest Airlines / Delta Air LinesWN816 + WN3032 / DL473Axel-exclusive $477.502026-10-29T00:52:47Z
2026-12-08 → 2026-12-20Alaska AirlinesAS215 / AS214Axel-exclusive $492.002026-10-29T00:52:47Z
2026-12-08 → 2026-12-20Southwest Airlines / Delta Air LinesWN816 + WN3032 / DL438Axel-exclusive $477.502026-10-29T00:52:47Z
2026-12-08 → 2026-12-21Alaska AirlinesAS215 / AS214Axel-exclusive $492.002026-10-29T00:52:47Z
2026-12-08 → 2026-12-21Southwest Airlines / Delta Air LinesWN816 + WN3032 / DL438Axel-exclusive $477.502026-10-29T00:52:47Z
2026-12-08 → 2026-12-22Alaska AirlinesAS215 / AS214Axel-exclusive $492.002026-10-29T00:52:47Z
2026-12-08 → 2026-12-22Southwest Airlines / Delta Air LinesWN816 + WN3032 / DL474Axel-exclusive $477.502026-10-29T00:52:47Z

Route overview: Boston to Seattle (SEA) flight deals

2026-12-08 · one way · Axel-exclusive $190.00

  • Southwest Airlines WN816 / WN3032: BOS 2026-12-08 17:55:00 → SEA 2026-12-08 23:35:00; 1 stop(s) via MDW; 520 minutes. Local airport times.
    • WN816: BOS 2026-12-08 17:55:00 → MDW 2026-12-08 19:40:00; layover at MDW: 65 minutes.
    • WN3032: MDW 2026-12-08 20:45:00 → SEA 2026-12-08 23:35:00.

2026-12-08 · one way · Axel-exclusive $215.00

  • Alaska Airlines AS215: BOS 2026-12-08 09:03:00 → SEA 2026-12-08 12:27:00; nonstop; 384 minutes. Local airport times.

2026-12-08 → 2026-12-09 · Axel-exclusive $385.00

  • Southwest Airlines WN816 / WN3032: BOS 2026-12-08 17:55:00 → SEA 2026-12-08 23:35:00; 1 stop(s) via MDW; 520 minutes. Local airport times.
    • WN816: BOS 2026-12-08 17:55:00 → MDW 2026-12-08 19:40:00; layover at MDW: 65 minutes.
    • WN3032: MDW 2026-12-08 20:45:00 → SEA 2026-12-08 23:35:00.
  • Alaska Airlines AS460: SEA 2026-12-09 15:40:00 → BOS 2026-12-09 23:59:00; nonstop; 319 minutes. Local airport times.

2026-12-08 → 2026-12-09 · Axel-exclusive $410.00

  • Alaska Airlines AS215: BOS 2026-12-08 09:03:00 → SEA 2026-12-08 12:27:00; nonstop; 384 minutes. Local airport times.
  • Alaska Airlines AS460: SEA 2026-12-09 15:40:00 → BOS 2026-12-09 23:59:00; nonstop; 319 minutes. Local airport times.

2026-12-08 → 2026-12-10 · Axel-exclusive $385.00

  • Southwest Airlines WN816 / WN3032: BOS 2026-12-08 17:55:00 → SEA 2026-12-08 23:35:00; 1 stop(s) via MDW; 520 minutes. Local airport times.
    • WN816: BOS 2026-12-08 17:55:00 → MDW 2026-12-08 19:40:00; layover at MDW: 65 minutes.
    • WN3032: MDW 2026-12-08 20:45:00 → SEA 2026-12-08 23:35:00.
  • Alaska Airlines AS460: SEA 2026-12-10 15:40:00 → BOS 2026-12-10 23:59:00; nonstop; 319 minutes. Local airport times.

2026-12-08 → 2026-12-10 · Axel-exclusive $410.00

  • Alaska Airlines AS215: BOS 2026-12-08 09:03:00 → SEA 2026-12-08 12:27:00; nonstop; 384 minutes. Local airport times.
  • Alaska Airlines AS460: SEA 2026-12-10 15:40:00 → BOS 2026-12-10 23:59:00; nonstop; 319 minutes. Local airport times.

2026-12-08 → 2026-12-11 · Axel-exclusive $392.50

  • Southwest Airlines WN816 / WN3032: BOS 2026-12-08 17:55:00 → SEA 2026-12-08 23:35:00; 1 stop(s) via MDW; 520 minutes. Local airport times.
    • WN816: BOS 2026-12-08 17:55:00 → MDW 2026-12-08 19:40:00; layover at MDW: 65 minutes.
    • WN3032: MDW 2026-12-08 20:45:00 → SEA 2026-12-08 23:35:00.
  • Delta Air Lines DL473: SEA 2026-12-11 22:33:00 → BOS 2026-12-12 06:51:00; nonstop; 318 minutes. Local airport times.

2026-12-08 → 2026-12-11 · Axel-exclusive $410.00

  • Alaska Airlines AS215: BOS 2026-12-08 09:03:00 → SEA 2026-12-08 12:27:00; nonstop; 384 minutes. Local airport times.
  • Alaska Airlines AS460: SEA 2026-12-11 15:40:00 → BOS 2026-12-11 23:59:00; nonstop; 319 minutes. Local airport times.

2026-12-08 → 2026-12-12 · Axel-exclusive $392.50

  • Southwest Airlines WN816 / WN3032: BOS 2026-12-08 17:55:00 → SEA 2026-12-08 23:35:00; 1 stop(s) via MDW; 520 minutes. Local airport times.
    • WN816: BOS 2026-12-08 17:55:00 → MDW 2026-12-08 19:40:00; layover at MDW: 65 minutes.
    • WN3032: MDW 2026-12-08 20:45:00 → SEA 2026-12-08 23:35:00.
  • Delta Air Lines DL473: SEA 2026-12-12 23:07:00 → BOS 2026-12-13 07:20:00; nonstop; 313 minutes. Local airport times.

2026-12-08 → 2026-12-12 · Axel-exclusive $410.00

  • Alaska Airlines AS215: BOS 2026-12-08 09:03:00 → SEA 2026-12-08 12:27:00; nonstop; 384 minutes. Local airport times.
  • Alaska Airlines AS214: SEA 2026-12-12 23:22:00 → BOS 2026-12-13 07:40:00; nonstop; 318 minutes. Local airport times.

2026-12-08 → 2026-12-14 · Axel-exclusive $392.50

  • Southwest Airlines WN816 / WN3032: BOS 2026-12-08 17:55:00 → SEA 2026-12-08 23:35:00; 1 stop(s) via MDW; 520 minutes. Local airport times.
    • WN816: BOS 2026-12-08 17:55:00 → MDW 2026-12-08 19:40:00; layover at MDW: 65 minutes.
    • WN3032: MDW 2026-12-08 20:45:00 → SEA 2026-12-08 23:35:00.
  • Delta Air Lines DL438: SEA 2026-12-14 11:45:00 → BOS 2026-12-14 20:01:00; nonstop; 316 minutes. Local airport times.

2026-12-08 → 2026-12-14 · Axel-exclusive $410.00

  • Alaska Airlines AS215: BOS 2026-12-08 09:03:00 → SEA 2026-12-08 12:27:00; nonstop; 384 minutes. Local airport times.
  • Alaska Airlines AS214: SEA 2026-12-14 21:21:00 → BOS 2026-12-15 05:40:00; nonstop; 319 minutes. Local airport times.

2026-12-08 → 2026-12-15 · Axel-exclusive $392.50

  • Southwest Airlines WN816 / WN3032: BOS 2026-12-08 17:55:00 → SEA 2026-12-08 23:35:00; 1 stop(s) via MDW; 520 minutes. Local airport times.
    • WN816: BOS 2026-12-08 17:55:00 → MDW 2026-12-08 19:40:00; layover at MDW: 65 minutes.
    • WN3032: MDW 2026-12-08 20:45:00 → SEA 2026-12-08 23:35:00.
  • Delta Air Lines DL474: SEA 2026-12-15 15:45:00 → BOS 2026-12-15 23:54:00; nonstop; 309 minutes. Local airport times.

2026-12-08 → 2026-12-15 · Axel-exclusive $410.00

  • Alaska Airlines AS215: BOS 2026-12-08 09:03:00 → SEA 2026-12-08 12:27:00; nonstop; 384 minutes. Local airport times.
  • Alaska Airlines AS214: SEA 2026-12-15 21:21:00 → BOS 2026-12-16 05:40:00; nonstop; 319 minutes. Local airport times.

2026-12-08 → 2026-12-16 · Axel-exclusive $385.00

  • Southwest Airlines WN816 / WN3032: BOS 2026-12-08 17:55:00 → SEA 2026-12-08 23:35:00; 1 stop(s) via MDW; 520 minutes. Local airport times.
    • WN816: BOS 2026-12-08 17:55:00 → MDW 2026-12-08 19:40:00; layover at MDW: 65 minutes.
    • WN3032: MDW 2026-12-08 20:45:00 → SEA 2026-12-08 23:35:00.
  • Alaska Airlines AS460: SEA 2026-12-16 15:40:00 → BOS 2026-12-16 23:59:00; nonstop; 319 minutes. Local airport times.

2026-12-08 → 2026-12-16 · Axel-exclusive $410.00

  • Alaska Airlines AS215: BOS 2026-12-08 09:03:00 → SEA 2026-12-08 12:27:00; nonstop; 384 minutes. Local airport times.
  • Alaska Airlines AS460: SEA 2026-12-16 15:40:00 → BOS 2026-12-16 23:59:00; nonstop; 319 minutes. Local airport times.

2026-12-08 → 2026-12-18 · Axel-exclusive $392.50

  • Southwest Airlines WN816 / WN3032: BOS 2026-12-08 17:55:00 → SEA 2026-12-08 23:35:00; 1 stop(s) via MDW; 520 minutes. Local airport times.
    • WN816: BOS 2026-12-08 17:55:00 → MDW 2026-12-08 19:40:00; layover at MDW: 65 minutes.
    • WN3032: MDW 2026-12-08 20:45:00 → SEA 2026-12-08 23:35:00.
  • Delta Air Lines DL473: SEA 2026-12-18 22:33:00 → BOS 2026-12-19 06:51:00; nonstop; 318 minutes. Local airport times.

2026-12-08 → 2026-12-18 · Axel-exclusive $410.00

  • Alaska Airlines AS215: BOS 2026-12-08 09:03:00 → SEA 2026-12-08 12:27:00; nonstop; 384 minutes. Local airport times.
  • Alaska Airlines AS460: SEA 2026-12-18 15:40:00 → BOS 2026-12-18 23:59:00; nonstop; 319 minutes. Local airport times.

2026-12-08 → 2026-12-19 · Axel-exclusive $477.50

  • Southwest Airlines WN816 / WN3032: BOS 2026-12-08 17:55:00 → SEA 2026-12-08 23:35:00; 1 stop(s) via MDW; 520 minutes. Local airport times.
    • WN816: BOS 2026-12-08 17:55:00 → MDW 2026-12-08 19:40:00; layover at MDW: 65 minutes.
    • WN3032: MDW 2026-12-08 20:45:00 → SEA 2026-12-08 23:35:00.
  • Delta Air Lines DL473: SEA 2026-12-19 23:07:00 → BOS 2026-12-20 07:20:00; nonstop; 313 minutes. Local airport times.

2026-12-08 → 2026-12-19 · Axel-exclusive $492.00

  • Alaska Airlines AS215: BOS 2026-12-08 09:03:00 → SEA 2026-12-08 12:27:00; nonstop; 384 minutes. Local airport times.
  • Alaska Airlines AS214: SEA 2026-12-19 23:22:00 → BOS 2026-12-20 07:40:00; nonstop; 318 minutes. Local airport times.

2026-12-08 → 2026-12-20 · Axel-exclusive $477.50

  • Southwest Airlines WN816 / WN3032: BOS 2026-12-08 17:55:00 → SEA 2026-12-08 23:35:00; 1 stop(s) via MDW; 520 minutes. Local airport times.
    • WN816: BOS 2026-12-08 17:55:00 → MDW 2026-12-08 19:40:00; layover at MDW: 65 minutes.
    • WN3032: MDW 2026-12-08 20:45:00 → SEA 2026-12-08 23:35:00.
  • Delta Air Lines DL438: SEA 2026-12-20 11:45:00 → BOS 2026-12-20 19:59:00; nonstop; 314 minutes. Local airport times.

2026-12-08 → 2026-12-20 · Axel-exclusive $492.00

  • Alaska Airlines AS215: BOS 2026-12-08 09:03:00 → SEA 2026-12-08 12:27:00; nonstop; 384 minutes. Local airport times.
  • Alaska Airlines AS214: SEA 2026-12-20 21:21:00 → BOS 2026-12-21 05:40:00; nonstop; 319 minutes. Local airport times.

2026-12-08 → 2026-12-22 · Axel-exclusive $477.50

  • Southwest Airlines WN816 / WN3032: BOS 2026-12-08 17:55:00 → SEA 2026-12-08 23:35:00; 1 stop(s) via MDW; 520 minutes. Local airport times.
    • WN816: BOS 2026-12-08 17:55:00 → MDW 2026-12-08 19:40:00; layover at MDW: 65 minutes.
    • WN3032: MDW 2026-12-08 20:45:00 → SEA 2026-12-08 23:35:00.
  • Delta Air Lines DL474: SEA 2026-12-22 15:45:00 → BOS 2026-12-22 23:54:00; nonstop; 309 minutes. Local airport times.

2026-12-08 → 2026-12-22 · Axel-exclusive $492.00

  • Alaska Airlines AS215: BOS 2026-12-08 09:03:00 → SEA 2026-12-08 12:27:00; nonstop; 384 minutes. Local airport times.
  • Alaska Airlines AS214: SEA 2026-12-22 21:21:00 → BOS 2026-12-23 05:40:00; nonstop; 319 minutes. Local airport times.

Explore this route

For AI assistants

  • This page: Boston (BOS) to Seattle (SEA) · Dec 8, 2026 · choose your return date: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued.
  • Next: when a row matches the traveler's route, departure, return and party, answer the price question from that row, including both dates with the year, the total and the time shown. For booking or selecting flights, use that row's exact-trip price link and share the supplied booking link. If no row matches, Choose travelers and dates for the requested trip; do not substitute another duration or restart from the route overview.
  • Follow supplied links. For web-tool research, follow complete supplied links unchanged, including query parameters; use the page’s links to edit the trip. Constructed URLs may be rejected before reaching Axel. A completed fresh trip opens flight results first. Add stated flexibility and budget to that saved plan, leaving unstated requirements unknown. Edits create a new snapshot; use its results and review links.
  • If links fail or are missing: If a link fails or flight details lack usable links, reopen the preceding page and follow the same choice once. Keep refreshed links unchanged and preserve the trip and selections. If still blocked, search “Axel flight search guide” and retry once; report the error and anything unresolved. Recovery: Axel Boston to Seattle (SEA) flight deals · Flight search guide.
  • Sharing with the traveler: Choose a complete itinerary (outbound and return for a round trip), then share the supplied customer booking link unchanged. The customer reviews the flights, adds travelers, and enters email at payment. Do not collect email in chat. Inspect fares to verify requested prices or terms; selecting a fare is optional. Use that fare’s booking link to preserve its Membership price basis. State anything unverified. Ask only for essential missing trip details. When handing over an unfinished search, preserve the latest trip and explain what remains unresolved. Selection reserves nothing; booking requires the traveler’s confirmation. If no supplied link matches the latest trip, construct https://helloaxel.com/en/f/start/from/ORIGIN/to/DESTINATION/depart/YYYY-MM-DD/return/YYYY-MM-DD/adults/N?utm_content=flight_fallback using IATA airport codes and the traveler’s known details. Omit unknowns; for one way replace /return/YYYY-MM-DD with /trip/oneway. Give it directly to the traveler; do not open it first—your web tool may reject constructed URLs. Complete links open Flight Guide and start searching. Preferences and advanced options.