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Route overview: Seattle to Boston (BOS) flight deals

Seattle (SEA) to Boston (BOS), Dec 18, 2026: round trips from $413, one way from $175

Seattle (SEA) to Boston (BOS), Dec 18, 2026: round trips from $413, one way from $175 on Axel, checked Oct 29, 2026. Lowest published fares: $413 round trip, Axel-exclusive, American Airlines / Alaska Airlines, 1 stop, Dec 18, 2026 – Jan 1, 2027; $175 one way, Axel-exclusive, American Airlines, 1 stop, Dec 18, 2026; 1 adult, economy, checked Oct 29, 2026.

SEA → BOS1 adulteconomyOne way and round trips

30 flight options · 2 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

Flights for your trip

  1. Fri, Dec 18 · One way

    American Airlines
    11:59 pmSEA
    7h 33m
    ORD · 1h 4m
    10:32 am+1BOS

    One-way total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  2. Fri, Dec 18 · One way

    Alaska Airlines
    3:40 pmSEA
    5h 19m
    Nonstop
    11:59 pmBOS

    One-way total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  3. Fri, Dec 18 – Sat, Dec 19

    American Airlines
    11:59 pmSEA
    7h 33m
    ORD · 1h 4m
    10:32 am+1BOS
    Alaska Airlines
    6:22 pmBOS
    6h 38m
    Nonstop
    10:00 pmSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  4. Fri, Dec 18 – Sat, Dec 19

    Alaska Airlines
    3:40 pmSEA
    5h 19m
    Nonstop
    11:59 pmBOS
    Alaska Airlines
    7:00 amBOS
    6h 38m
    Nonstop
    10:38 amSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  5. Fri, Dec 18 – Sun, Dec 20

    American Airlines
    11:59 pmSEA
    7h 33m
    ORD · 1h 4m
    10:32 am+1BOS
    Alaska Airlines
    6:19 pmBOS
    6h 41m
    Nonstop
    10:00 pmSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  6. Fri, Dec 18 – Sun, Dec 20

    Alaska Airlines
    3:40 pmSEA
    5h 19m
    Nonstop
    11:59 pmBOS
    Alaska Airlines
    6:19 pmBOS
    6h 41m
    Nonstop
    10:00 pmSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  7. Fri, Dec 18 – Mon, Dec 21

    American Airlines
    11:59 pmSEA
    7h 33m
    ORD · 1h 4m
    10:32 am+1BOS
    Alaska Airlines
    9:00 amBOS
    6h 37m
    Nonstop
    12:37 pmSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  8. Fri, Dec 18 – Mon, Dec 21

    Alaska Airlines
    3:40 pmSEA
    5h 19m
    Nonstop
    11:59 pmBOS
    Alaska Airlines
    9:00 amBOS
    6h 37m
    Nonstop
    12:37 pmSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  9. Fri, Dec 18 – Tue, Dec 22

    American Airlines
    11:59 pmSEA
    7h 33m
    ORD · 1h 4m
    10:32 am+1BOS
    Alaska Airlines
    9:00 amBOS
    6h 37m
    Nonstop
    12:37 pmSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  10. Fri, Dec 18 – Tue, Dec 22

    Alaska Airlines
    3:40 pmSEA
    5h 19m
    Nonstop
    11:59 pmBOS
    Alaska Airlines
    9:00 amBOS
    6h 37m
    Nonstop
    12:37 pmSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  11. Fri, Dec 18 – Thu, Dec 24

    American Airlines
    11:59 pmSEA
    7h 33m
    ORD · 1h 4m
    10:32 am+1BOS
    Alaska Airlines
    9:00 amBOS
    6h 37m
    Nonstop
    12:37 pmSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  12. Fri, Dec 18 – Thu, Dec 24

    Alaska Airlines
    3:40 pmSEA
    5h 19m
    Nonstop
    11:59 pmBOS
    Alaska Airlines
    9:00 amBOS
    6h 37m
    Nonstop
    12:37 pmSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  13. Fri, Dec 18 – Fri, Dec 25

    American Airlines
    11:59 pmSEA
    7h 33m
    ORD · 1h 4m
    10:32 am+1BOS
    Alaska Airlines
    9:00 amBOS
    6h 37m
    Nonstop
    12:37 pmSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  14. Fri, Dec 18 – Fri, Dec 25

    Alaska Airlines
    3:40 pmSEA
    5h 19m
    Nonstop
    11:59 pmBOS
    Alaska Airlines
    9:00 amBOS
    6h 37m
    Nonstop
    12:37 pmSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  15. Fri, Dec 18 – Sat, Dec 26

    American Airlines
    11:59 pmSEA
    7h 33m
    ORD · 1h 4m
    10:32 am+1BOS
    Alaska Airlines
    7:00 amBOS
    6h 38m
    Nonstop
    10:38 amSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  16. Fri, Dec 18 – Sat, Dec 26

    Alaska Airlines
    3:40 pmSEA
    5h 19m
    Nonstop
    11:59 pmBOS
    Alaska Airlines
    7:00 amBOS
    6h 38m
    Nonstop
    10:38 amSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  17. Fri, Dec 18 – Mon, Dec 28

    American Airlines
    11:59 pmSEA
    7h 33m
    ORD · 1h 4m
    10:32 am+1BOS
    Alaska Airlines
    9:00 amBOS
    6h 37m
    Nonstop
    12:37 pmSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  18. Fri, Dec 18 – Mon, Dec 28

    Alaska Airlines
    3:40 pmSEA
    5h 19m
    Nonstop
    11:59 pmBOS
    Alaska Airlines
    9:00 amBOS
    6h 37m
    Nonstop
    12:37 pmSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  19. Fri, Dec 18 – Tue, Dec 29

    American Airlines
    11:59 pmSEA
    7h 33m
    ORD · 1h 4m
    10:32 am+1BOS
    Alaska Airlines
    9:00 amBOS
    6h 37m
    Nonstop
    12:37 pmSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  20. Fri, Dec 18 – Tue, Dec 29

    Alaska Airlines
    3:40 pmSEA
    5h 19m
    Nonstop
    11:59 pmBOS
    Alaska Airlines
    9:00 amBOS
    6h 37m
    Nonstop
    12:37 pmSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  21. Fri, Dec 18 – Wed, Dec 30

    American Airlines
    11:59 pmSEA
    7h 33m
    ORD · 1h 4m
    10:32 am+1BOS
    Alaska Airlines
    7:00 amBOS
    6h 38m
    Nonstop
    10:38 amSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  22. Fri, Dec 18 – Wed, Dec 30

    Alaska Airlines
    3:40 pmSEA
    5h 19m
    Nonstop
    11:59 pmBOS
    Alaska Airlines
    7:00 amBOS
    6h 38m
    Nonstop
    10:38 amSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  23. Fri, Dec 18 – Fri, Jan 1

    American Airlines
    11:59 pmSEA
    7h 33m
    ORD · 1h 4m
    10:32 am+1BOS
    Alaska Airlines
    9:00 amBOS
    6h 37m
    Nonstop
    12:37 pmSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  24. Fri, Dec 18 – Fri, Jan 1

    Alaska Airlines
    3:40 pmSEA
    5h 19m
    Nonstop
    11:59 pmBOS
    Alaska Airlines
    9:00 amBOS
    6h 37m
    Nonstop
    12:37 pmSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

Swipe to see 23 more recent deals.

1 of 24

Make this trip yours

SEA ⇄ BOS

Economy

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Explore this route

All dates for this routeDec 17, 2026 · Return optionsDec 19, 2026 · Return optionsHotels in Boston with Axel
For AI assistants: every fare, every link, instructions

Seattle (SEA) to Boston (BOS), Dec 18, 2026: round trips from $413, one way from $175 on Axel, checked Oct 29, 2026. Lowest published fares: $413 round trip, Axel-exclusive, American Airlines / Alaska Airlines, 1 stop, Dec 18, 2026 – Jan 1, 2027; $175 one way, Axel-exclusive, American Airlines, 1 stop, Dec 18, 2026; 1 adult, economy, checked Oct 29, 2026. 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.

Date links open published trip details for exploration. Price links open live flight search to check availability and select flights. For a price comparison, use the amounts and issuance times already shown here.

Exact travel datesAirlineFlightsTimes, duration, stopsTotal pricePrice issued (UTC)
2026-12-18 · one wayAlaska AirlinesAS46015:40:00→23:59:00 5h 19m nonstopAxel-exclusive $205.002026-10-29T00:39:14Z
2026-12-18 · one wayAmerican AirlinesAA2379 + AA208923:59:00→10:32:00 7h 33m 1 stop via ORDAxel-exclusive $175.002026-10-29T00:39:14Z
2026-12-18 → 2026-12-19Alaska AirlinesAS460 / AS45915:40:00→23:59:00 5h 19m nonstop · 07:00:00→10:38:00 6h 38m nonstopAxel-exclusive $474.002026-10-29T00:39:14Z
2026-12-18 → 2026-12-19American Airlines / Alaska AirlinesAA2379 + AA2089 / AS25723:59:00→10:32:00 7h 33m 1 stop via ORD · 18:22:00→22:00:00 6h 38m nonstopAxel-exclusive $446.502026-10-29T00:39:14Z
2026-12-18 → 2026-12-20Alaska AirlinesAS460 / AS25715:40:00→23:59:00 5h 19m nonstop · 18:19:00→22:00:00 6h 41m nonstopAxel-exclusive $474.002026-10-29T00:39:14Z
2026-12-18 → 2026-12-20American Airlines / Alaska AirlinesAA2379 + AA2089 / AS25723:59:00→10:32:00 7h 33m 1 stop via ORD · 18:19:00→22:00:00 6h 41m nonstopAxel-exclusive $446.502026-10-29T00:39:14Z
2026-12-18 → 2026-12-21Alaska AirlinesAS460 / AS21515:40:00→23:59:00 5h 19m nonstop · 09:00:00→12:37:00 6h 37m nonstopAxel-exclusive $474.002026-10-29T00:39:14Z
2026-12-18 → 2026-12-21American Airlines / Alaska AirlinesAA2379 + AA2089 / AS21523:59:00→10:32:00 7h 33m 1 stop via ORD · 09:00:00→12:37:00 6h 37m nonstopAxel-exclusive $446.502026-10-29T00:39:14Z
2026-12-18 → 2026-12-22Alaska AirlinesAS460 / AS21515:40:00→23:59:00 5h 19m nonstop · 09:00:00→12:37:00 6h 37m nonstopAxel-exclusive $474.002026-10-29T00:39:14Z
2026-12-18 → 2026-12-22American Airlines / Alaska AirlinesAA2379 + AA2089 / AS21523:59:00→10:32:00 7h 33m 1 stop via ORD · 09:00:00→12:37:00 6h 37m nonstopAxel-exclusive $446.502026-10-29T00:39:14Z
2026-12-18 → 2026-12-23Alaska AirlinesAS460 / AS45915:40:00→23:59:00 5h 19m nonstop · 07:00:00→10:38:00 6h 38m nonstopAxel-exclusive $474.002026-10-29T00:39:14Z
2026-12-18 → 2026-12-23American Airlines / Alaska AirlinesAA2379 + AA2089 / AS45923:59:00→10:32:00 7h 33m 1 stop via ORD · 07:00:00→10:38:00 6h 38m nonstopAxel-exclusive $446.502026-10-29T00:39:14Z
2026-12-18 → 2026-12-24Alaska AirlinesAS460 / AS21515:40:00→23:59:00 5h 19m nonstop · 09:00:00→12:37:00 6h 37m nonstopAxel-exclusive $474.002026-10-29T00:39:14Z
2026-12-18 → 2026-12-24American Airlines / Alaska AirlinesAA2379 + AA2089 / AS21523:59:00→10:32:00 7h 33m 1 stop via ORD · 09:00:00→12:37:00 6h 37m nonstopAxel-exclusive $446.502026-10-29T00:39:14Z
2026-12-18 → 2026-12-25Alaska AirlinesAS460 / AS21515:40:00→23:59:00 5h 19m nonstop · 09:00:00→12:37:00 6h 37m nonstopAxel-exclusive $474.002026-10-29T00:39:14Z
2026-12-18 → 2026-12-25American Airlines / Alaska AirlinesAA2379 + AA2089 / AS21523:59:00→10:32:00 7h 33m 1 stop via ORD · 09:00:00→12:37:00 6h 37m nonstopAxel-exclusive $446.502026-10-29T00:39:14Z
2026-12-18 → 2026-12-26Alaska AirlinesAS460 / AS45915:40:00→23:59:00 5h 19m nonstop · 07:00:00→10:38:00 6h 38m nonstopAxel-exclusive $474.002026-10-29T00:39:14Z
2026-12-18 → 2026-12-26American Airlines / Alaska AirlinesAA2379 + AA2089 / AS45923:59:00→10:32:00 7h 33m 1 stop via ORD · 07:00:00→10:38:00 6h 38m nonstopAxel-exclusive $446.502026-10-29T00:39:14Z
2026-12-18 → 2026-12-27Alaska AirlinesAS460 / AS25715:40:00→23:59:00 5h 19m nonstop · 18:19:00→22:00:00 6h 41m nonstopAxel-exclusive $474.002026-10-29T00:39:14Z
2026-12-18 → 2026-12-27American Airlines / Alaska AirlinesAA2379 + AA2089 / AS25723:59:00→10:32:00 7h 33m 1 stop via ORD · 18:19:00→22:00:00 6h 41m nonstopAxel-exclusive $446.502026-10-29T00:39:14Z
2026-12-18 → 2026-12-28Alaska AirlinesAS460 / AS21515:40:00→23:59:00 5h 19m nonstop · 09:00:00→12:37:00 6h 37m nonstopAxel-exclusive $454.252026-10-29T00:39:14Z
2026-12-18 → 2026-12-28American Airlines / Alaska AirlinesAA2379 + AA2089 / AS21523:59:00→10:32:00 7h 33m 1 stop via ORD · 09:00:00→12:37:00 6h 37m nonstopAxel-exclusive $426.752026-10-29T00:39:14Z
2026-12-18 → 2026-12-29Alaska AirlinesAS460 / AS21515:40:00→23:59:00 5h 19m nonstop · 09:00:00→12:37:00 6h 37m nonstopAxel-exclusive $454.252026-10-29T00:39:14Z
2026-12-18 → 2026-12-29American Airlines / Alaska AirlinesAA2379 + AA2089 / AS21523:59:00→10:32:00 7h 33m 1 stop via ORD · 09:00:00→12:37:00 6h 37m nonstopAxel-exclusive $426.752026-10-29T00:39:14Z
2026-12-18 → 2026-12-30Alaska AirlinesAS460 / AS45915:40:00→23:59:00 5h 19m nonstop · 07:00:00→10:38:00 6h 38m nonstopAxel-exclusive $454.252026-10-29T00:39:14Z
2026-12-18 → 2026-12-30American Airlines / Alaska AirlinesAA2379 + AA2089 / AS45923:59:00→10:32:00 7h 33m 1 stop via ORD · 07:00:00→10:38:00 6h 38m nonstopAxel-exclusive $426.752026-10-29T00:39:14Z
2026-12-18 → 2026-12-31Alaska AirlinesAS460 / AS21515:40:00→23:59:00 5h 19m nonstop · 09:00:00→12:37:00 6h 37m nonstopAxel-exclusive $454.252026-10-29T00:39:14Z
2026-12-18 → 2026-12-31American Airlines / Alaska AirlinesAA2379 + AA2089 / AS21523:59:00→10:32:00 7h 33m 1 stop via ORD · 09:00:00→12:37:00 6h 37m nonstopAxel-exclusive $426.752026-10-29T00:39:14Z
2026-12-18 → 2027-01-01Alaska AirlinesAS460 / AS21515:40:00→23:59:00 5h 19m nonstop · 09:00:00→12:37:00 6h 37m nonstopAxel-exclusive $440.432026-10-29T00:39:14Z
2026-12-18 → 2027-01-01American Airlines / Alaska AirlinesAA2379 + AA2089 / AS21523:59:00→10:32:00 7h 33m 1 stop via ORD · 09:00:00→12:37:00 6h 37m nonstopAxel-exclusive $412.932026-10-29T00:39:14Z

Hotels in Boston for these trips

Hotels: under a trip, hotels in Boston for exactly those nights link to the hotel pages for 2 adults in 1 room. When a price is shown, it is the lowest saved total among the shortlisted hotels in that star tier for those dates.

All hotels in Boston

Route overview: Seattle to Boston (BOS) flight deals

2026-12-18 · one way · Axel-exclusive $175.00

  • American Airlines AA2379 / AA2089: SEA 2026-12-18 23:59:00 → BOS 2026-12-19 10:32:00; 1 stop(s) via ORD; 453 minutes. Local airport times.
    • AA2379: SEA 2026-12-18 23:59:00 → ORD 2026-12-19 05:55:00; layover at ORD: 64 minutes.
    • AA2089: ORD 2026-12-19 06:59:00 → BOS 2026-12-19 10:32:00.

2026-12-18 · one way · Axel-exclusive $205.00

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

2026-12-18 → 2026-12-19 · Axel-exclusive $446.50

  • American Airlines AA2379 / AA2089: SEA 2026-12-18 23:59:00 → BOS 2026-12-19 10:32:00; 1 stop(s) via ORD; 453 minutes. Local airport times.
    • AA2379: SEA 2026-12-18 23:59:00 → ORD 2026-12-19 05:55:00; layover at ORD: 64 minutes.
    • AA2089: ORD 2026-12-19 06:59:00 → BOS 2026-12-19 10:32:00.
  • Alaska Airlines AS257: BOS 2026-12-19 18:22:00 → SEA 2026-12-19 22:00:00; nonstop; 398 minutes. Local airport times.

2026-12-18 → 2026-12-19 · Axel-exclusive $474.00

  • Alaska Airlines AS460: SEA 2026-12-18 15:40:00 → BOS 2026-12-18 23:59:00; nonstop; 319 minutes. Local airport times.
  • Alaska Airlines AS459: BOS 2026-12-19 07:00:00 → SEA 2026-12-19 10:38:00; nonstop; 398 minutes. Local airport times.

2026-12-18 → 2026-12-20 · Axel-exclusive $446.50

  • American Airlines AA2379 / AA2089: SEA 2026-12-18 23:59:00 → BOS 2026-12-19 10:32:00; 1 stop(s) via ORD; 453 minutes. Local airport times.
    • AA2379: SEA 2026-12-18 23:59:00 → ORD 2026-12-19 05:55:00; layover at ORD: 64 minutes.
    • AA2089: ORD 2026-12-19 06:59:00 → BOS 2026-12-19 10:32:00.
  • Alaska Airlines AS257: BOS 2026-12-20 18:19:00 → SEA 2026-12-20 22:00:00; nonstop; 401 minutes. Local airport times.

2026-12-18 → 2026-12-20 · Axel-exclusive $474.00

  • Alaska Airlines AS460: SEA 2026-12-18 15:40:00 → BOS 2026-12-18 23:59:00; nonstop; 319 minutes. Local airport times.
  • Alaska Airlines AS257: BOS 2026-12-20 18:19:00 → SEA 2026-12-20 22:00:00; nonstop; 401 minutes. Local airport times.

2026-12-18 → 2026-12-21 · Axel-exclusive $446.50

  • American Airlines AA2379 / AA2089: SEA 2026-12-18 23:59:00 → BOS 2026-12-19 10:32:00; 1 stop(s) via ORD; 453 minutes. Local airport times.
    • AA2379: SEA 2026-12-18 23:59:00 → ORD 2026-12-19 05:55:00; layover at ORD: 64 minutes.
    • AA2089: ORD 2026-12-19 06:59:00 → BOS 2026-12-19 10:32:00.
  • Alaska Airlines AS215: BOS 2026-12-21 09:00:00 → SEA 2026-12-21 12:37:00; nonstop; 397 minutes. Local airport times.

2026-12-18 → 2026-12-21 · Axel-exclusive $474.00

  • Alaska Airlines AS460: SEA 2026-12-18 15:40:00 → BOS 2026-12-18 23:59:00; nonstop; 319 minutes. Local airport times.
  • Alaska Airlines AS215: BOS 2026-12-21 09:00:00 → SEA 2026-12-21 12:37:00; nonstop; 397 minutes. Local airport times.

2026-12-18 → 2026-12-22 · Axel-exclusive $446.50

  • American Airlines AA2379 / AA2089: SEA 2026-12-18 23:59:00 → BOS 2026-12-19 10:32:00; 1 stop(s) via ORD; 453 minutes. Local airport times.
    • AA2379: SEA 2026-12-18 23:59:00 → ORD 2026-12-19 05:55:00; layover at ORD: 64 minutes.
    • AA2089: ORD 2026-12-19 06:59:00 → BOS 2026-12-19 10:32:00.
  • Alaska Airlines AS215: BOS 2026-12-22 09:00:00 → SEA 2026-12-22 12:37:00; nonstop; 397 minutes. Local airport times.

2026-12-18 → 2026-12-22 · Axel-exclusive $474.00

  • Alaska Airlines AS460: SEA 2026-12-18 15:40:00 → BOS 2026-12-18 23:59:00; nonstop; 319 minutes. Local airport times.
  • Alaska Airlines AS215: BOS 2026-12-22 09:00:00 → SEA 2026-12-22 12:37:00; nonstop; 397 minutes. Local airport times.

2026-12-18 → 2026-12-24 · Axel-exclusive $446.50

  • American Airlines AA2379 / AA2089: SEA 2026-12-18 23:59:00 → BOS 2026-12-19 10:32:00; 1 stop(s) via ORD; 453 minutes. Local airport times.
    • AA2379: SEA 2026-12-18 23:59:00 → ORD 2026-12-19 05:55:00; layover at ORD: 64 minutes.
    • AA2089: ORD 2026-12-19 06:59:00 → BOS 2026-12-19 10:32:00.
  • Alaska Airlines AS215: BOS 2026-12-24 09:00:00 → SEA 2026-12-24 12:37:00; nonstop; 397 minutes. Local airport times.

2026-12-18 → 2026-12-24 · Axel-exclusive $474.00

  • Alaska Airlines AS460: SEA 2026-12-18 15:40:00 → BOS 2026-12-18 23:59:00; nonstop; 319 minutes. Local airport times.
  • Alaska Airlines AS215: BOS 2026-12-24 09:00:00 → SEA 2026-12-24 12:37:00; nonstop; 397 minutes. Local airport times.

2026-12-18 → 2026-12-25 · Axel-exclusive $446.50

  • American Airlines AA2379 / AA2089: SEA 2026-12-18 23:59:00 → BOS 2026-12-19 10:32:00; 1 stop(s) via ORD; 453 minutes. Local airport times.
    • AA2379: SEA 2026-12-18 23:59:00 → ORD 2026-12-19 05:55:00; layover at ORD: 64 minutes.
    • AA2089: ORD 2026-12-19 06:59:00 → BOS 2026-12-19 10:32:00.
  • Alaska Airlines AS215: BOS 2026-12-25 09:00:00 → SEA 2026-12-25 12:37:00; nonstop; 397 minutes. Local airport times.

2026-12-18 → 2026-12-25 · Axel-exclusive $474.00

  • Alaska Airlines AS460: SEA 2026-12-18 15:40:00 → BOS 2026-12-18 23:59:00; nonstop; 319 minutes. Local airport times.
  • Alaska Airlines AS215: BOS 2026-12-25 09:00:00 → SEA 2026-12-25 12:37:00; nonstop; 397 minutes. Local airport times.

2026-12-18 → 2026-12-26 · Axel-exclusive $446.50

  • American Airlines AA2379 / AA2089: SEA 2026-12-18 23:59:00 → BOS 2026-12-19 10:32:00; 1 stop(s) via ORD; 453 minutes. Local airport times.
    • AA2379: SEA 2026-12-18 23:59:00 → ORD 2026-12-19 05:55:00; layover at ORD: 64 minutes.
    • AA2089: ORD 2026-12-19 06:59:00 → BOS 2026-12-19 10:32:00.
  • Alaska Airlines AS459: BOS 2026-12-26 07:00:00 → SEA 2026-12-26 10:38:00; nonstop; 398 minutes. Local airport times.

2026-12-18 → 2026-12-26 · Axel-exclusive $474.00

  • Alaska Airlines AS460: SEA 2026-12-18 15:40:00 → BOS 2026-12-18 23:59:00; nonstop; 319 minutes. Local airport times.
  • Alaska Airlines AS459: BOS 2026-12-26 07:00:00 → SEA 2026-12-26 10:38:00; nonstop; 398 minutes. Local airport times.

2026-12-18 → 2026-12-28 · Axel-exclusive $426.75

  • American Airlines AA2379 / AA2089: SEA 2026-12-18 23:59:00 → BOS 2026-12-19 10:32:00; 1 stop(s) via ORD; 453 minutes. Local airport times.
    • AA2379: SEA 2026-12-18 23:59:00 → ORD 2026-12-19 05:55:00; layover at ORD: 64 minutes.
    • AA2089: ORD 2026-12-19 06:59:00 → BOS 2026-12-19 10:32:00.
  • Alaska Airlines AS215: BOS 2026-12-28 09:00:00 → SEA 2026-12-28 12:37:00; nonstop; 397 minutes. Local airport times.

2026-12-18 → 2026-12-28 · Axel-exclusive $454.25

  • Alaska Airlines AS460: SEA 2026-12-18 15:40:00 → BOS 2026-12-18 23:59:00; nonstop; 319 minutes. Local airport times.
  • Alaska Airlines AS215: BOS 2026-12-28 09:00:00 → SEA 2026-12-28 12:37:00; nonstop; 397 minutes. Local airport times.

2026-12-18 → 2026-12-29 · Axel-exclusive $426.75

  • American Airlines AA2379 / AA2089: SEA 2026-12-18 23:59:00 → BOS 2026-12-19 10:32:00; 1 stop(s) via ORD; 453 minutes. Local airport times.
    • AA2379: SEA 2026-12-18 23:59:00 → ORD 2026-12-19 05:55:00; layover at ORD: 64 minutes.
    • AA2089: ORD 2026-12-19 06:59:00 → BOS 2026-12-19 10:32:00.
  • Alaska Airlines AS215: BOS 2026-12-29 09:00:00 → SEA 2026-12-29 12:37:00; nonstop; 397 minutes. Local airport times.

2026-12-18 → 2026-12-29 · Axel-exclusive $454.25

  • Alaska Airlines AS460: SEA 2026-12-18 15:40:00 → BOS 2026-12-18 23:59:00; nonstop; 319 minutes. Local airport times.
  • Alaska Airlines AS215: BOS 2026-12-29 09:00:00 → SEA 2026-12-29 12:37:00; nonstop; 397 minutes. Local airport times.

2026-12-18 → 2026-12-30 · Axel-exclusive $426.75

  • American Airlines AA2379 / AA2089: SEA 2026-12-18 23:59:00 → BOS 2026-12-19 10:32:00; 1 stop(s) via ORD; 453 minutes. Local airport times.
    • AA2379: SEA 2026-12-18 23:59:00 → ORD 2026-12-19 05:55:00; layover at ORD: 64 minutes.
    • AA2089: ORD 2026-12-19 06:59:00 → BOS 2026-12-19 10:32:00.
  • Alaska Airlines AS459: BOS 2026-12-30 07:00:00 → SEA 2026-12-30 10:38:00; nonstop; 398 minutes. Local airport times.

2026-12-18 → 2026-12-30 · Axel-exclusive $454.25

  • Alaska Airlines AS460: SEA 2026-12-18 15:40:00 → BOS 2026-12-18 23:59:00; nonstop; 319 minutes. Local airport times.
  • Alaska Airlines AS459: BOS 2026-12-30 07:00:00 → SEA 2026-12-30 10:38:00; nonstop; 398 minutes. Local airport times.

2026-12-18 → 2027-01-01 · Axel-exclusive $412.93

  • American Airlines AA2379 / AA2089: SEA 2026-12-18 23:59:00 → BOS 2026-12-19 10:32:00; 1 stop(s) via ORD; 453 minutes. Local airport times.
    • AA2379: SEA 2026-12-18 23:59:00 → ORD 2026-12-19 05:55:00; layover at ORD: 64 minutes.
    • AA2089: ORD 2026-12-19 06:59:00 → BOS 2026-12-19 10:32:00.
  • Alaska Airlines AS215: BOS 2027-01-01 09:00:00 → SEA 2027-01-01 12:37:00; nonstop; 397 minutes. Local airport times.

2026-12-18 → 2027-01-01 · Axel-exclusive $440.43

  • Alaska Airlines AS460: SEA 2026-12-18 15:40:00 → BOS 2026-12-18 23:59:00; nonstop; 319 minutes. Local airport times.
  • Alaska Airlines AS215: BOS 2027-01-01 09:00:00 → SEA 2027-01-01 12:37:00; nonstop; 397 minutes. Local airport times.

Explore this route

For AI assistants

  • This page: Seattle (SEA) to Boston (BOS) · Dec 18, 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. Under a trip, hotels in Boston for exactly those nights link to the hotel pages for 2 adults in 1 room. Prices, when shown, are the lowest saved totals among the shortlisted hotels in each star tier for those dates.
  • Next: each row is one exact trip for this departure (both dates with the year, the total and the time its price was issued); its exact-trip price link opens the live search for those dates and travelers, where the booking link and the current total are. Other durations or travelers are not priced here: Choose travelers and dates prices the requested trip.
  • 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 Seattle to Boston (BOS) 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. Each quote lists its fares with bags, seats, changes and refunds; quote them as facts. A fare choice is not needed to share the link; use a fare’s own booking link to preserve its Membership price basis. Ask only for essential missing trip details. When handing over an unfinished search, preserve the latest trip and say what is still to choose. 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.