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Route overview: Seattle to Boston (BOS) flight deals

Seattle → Boston

Jun 5, 2027 · choose your return date

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.

June 2027

Jun 5, 2027 · One wayAlaska AirlinesNonstop$270.00 Jun 5, 2027 · One wayDelta Air LinesNonstop$280.00 Jun 5, 2027 – Jun 6, 2027 · 1 nightAlaska AirlinesNonstop$525.00 Jun 5, 2027 – Jun 6, 2027 · 1 nightDelta Air LinesNonstop$545.00 Jun 5, 2027 – Jun 7, 2027 · 2 nightsAlaska AirlinesNonstop$525.00 Jun 5, 2027 – Jun 7, 2027 · 2 nightsDelta Air LinesNonstop$545.00 Jun 5, 2027 – Jun 8, 2027 · 3 nightsAlaska AirlinesNonstop$525.00 Jun 5, 2027 – Jun 8, 2027 · 3 nightsDelta Air LinesNonstop$545.00 Jun 5, 2027 – Jun 9, 2027 · 4 nightsAlaska AirlinesNonstop$525.00 Jun 5, 2027 – Jun 9, 2027 · 4 nightsDelta Air LinesNonstop$545.00 Jun 5, 2027 – Jun 10, 2027 · 5 nightsAlaska AirlinesNonstop$525.00 Jun 5, 2027 – Jun 10, 2027 · 5 nightsDelta Air LinesNonstop$545.00 Jun 5, 2027 – Jun 11, 2027 · 6 nightsAlaska AirlinesNonstop$525.00 Jun 5, 2027 – Jun 11, 2027 · 6 nightsDelta Air LinesNonstop$545.00 Jun 5, 2027 – Jun 12, 2027 · 7 nightsAlaska AirlinesNonstop$525.00 Jun 5, 2027 – Jun 12, 2027 · 7 nightsDelta Air LinesNonstop$545.00 Jun 5, 2027 – Jun 13, 2027 · 8 nightsAlaska AirlinesNonstop$525.00 Jun 5, 2027 – Jun 13, 2027 · 8 nightsDelta Air LinesNonstop$545.00 Jun 5, 2027 – Jun 14, 2027 · 9 nightsAlaska AirlinesNonstop$525.00 Jun 5, 2027 – Jun 14, 2027 · 9 nightsDelta Air LinesNonstop$545.00 Jun 5, 2027 – Jun 15, 2027 · 10 nightsAlaska AirlinesNonstop$525.00 Jun 5, 2027 – Jun 15, 2027 · 10 nightsDelta Air LinesNonstop$545.00 Jun 5, 2027 – Jun 16, 2027 · 11 nightsAlaska AirlinesNonstop$525.00 Jun 5, 2027 – Jun 16, 2027 · 11 nightsDelta Air LinesNonstop$545.00 Jun 5, 2027 – Jun 17, 2027 · 12 nightsAlaska AirlinesNonstop$525.00 Jun 5, 2027 – Jun 17, 2027 · 12 nightsDelta Air LinesNonstop$545.00 Jun 5, 2027 – Jun 18, 2027 · 13 nightsAlaska AirlinesNonstop$525.00 Jun 5, 2027 – Jun 18, 2027 · 13 nightsDelta Air LinesNonstop$545.00 Jun 5, 2027 – Jun 19, 2027 · 14 nightsAlaska AirlinesNonstop$525.00 Jun 5, 2027 – Jun 19, 2027 · 14 nightsDelta Air LinesNonstop$545.00

Flights for your trip

  1. Sat, Jun 5 · One way

    Alaska Airlines
    9:20 pmSEA
    5h 20m
    Nonstop
    5:40 am+1BOS

    One-way total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  2. Sat, Jun 5 · One way

    Delta Air Lines
    7:20 amSEA
    5h 34m
    Nonstop
    3:54 pmBOS

    One-way total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  3. Sat, Jun 5 – Sun, Jun 6

    Alaska Airlines
    9:20 pmSEA
    5h 20m
    Nonstop
    5:40 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.

  4. Sat, Jun 5 – Sun, Jun 6

    Delta Air Lines
    7:20 amSEA
    5h 34m
    Nonstop
    3:54 pmBOS
    Delta Air Lines
    7:30 amBOS
    6h 35m
    Nonstop
    11:05 amSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  5. Sat, Jun 5 – Mon, Jun 7

    Alaska Airlines
    9:20 pmSEA
    5h 20m
    Nonstop
    5:40 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.

  6. Sat, Jun 5 – Mon, Jun 7

    Delta Air Lines
    7:20 amSEA
    5h 34m
    Nonstop
    3:54 pmBOS
    Delta Air Lines
    7:50 amBOS
    6h 31m
    Nonstop
    11:21 amSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  7. Sat, Jun 5 – Tue, Jun 8

    Alaska Airlines
    9:20 pmSEA
    5h 20m
    Nonstop
    5:40 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. Sat, Jun 5 – Tue, Jun 8

    Delta Air Lines
    7:20 amSEA
    5h 34m
    Nonstop
    3:54 pmBOS
    Delta Air Lines
    10:40 amBOS
    6h 29m
    Nonstop
    2:09 pmSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  9. Sat, Jun 5 – Wed, Jun 9

    Alaska Airlines
    9:20 pmSEA
    5h 20m
    Nonstop
    5:40 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.

  10. Sat, Jun 5 – Wed, Jun 9

    Delta Air Lines
    7:20 amSEA
    5h 34m
    Nonstop
    3:54 pmBOS
    Delta Air Lines
    7:30 amBOS
    6h 35m
    Nonstop
    11:05 amSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  11. Sat, Jun 5 – Fri, Jun 11

    Alaska Airlines
    9:20 pmSEA
    5h 20m
    Nonstop
    5:40 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. Sat, Jun 5 – Fri, Jun 11

    Delta Air Lines
    7:20 amSEA
    5h 34m
    Nonstop
    3:54 pmBOS
    Delta Air Lines
    7:50 amBOS
    6h 31m
    Nonstop
    11:21 amSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  13. Sat, Jun 5 – Sat, Jun 12

    Alaska Airlines
    9:20 pmSEA
    5h 20m
    Nonstop
    5:40 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.

  14. Sat, Jun 5 – Sat, Jun 12

    Delta Air Lines
    7:20 amSEA
    5h 34m
    Nonstop
    3:54 pmBOS
    Delta Air Lines
    7:30 amBOS
    6h 35m
    Nonstop
    11:05 amSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  15. Sat, Jun 5 – Sun, Jun 13

    Alaska Airlines
    9:20 pmSEA
    5h 20m
    Nonstop
    5:40 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.

  16. Sat, Jun 5 – Sun, Jun 13

    Delta Air Lines
    7:20 amSEA
    5h 34m
    Nonstop
    3:54 pmBOS
    Delta Air Lines
    7:30 amBOS
    6h 35m
    Nonstop
    11:05 amSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  17. Sat, Jun 5 – Tue, Jun 15

    Alaska Airlines
    9:20 pmSEA
    5h 20m
    Nonstop
    5:40 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. Sat, Jun 5 – Tue, Jun 15

    Delta Air Lines
    7:20 amSEA
    5h 34m
    Nonstop
    3:54 pmBOS
    Delta Air Lines
    10:40 amBOS
    6h 29m
    Nonstop
    2:09 pmSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  19. Sat, Jun 5 – Wed, Jun 16

    Alaska Airlines
    9:20 pmSEA
    5h 20m
    Nonstop
    5:40 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.

  20. Sat, Jun 5 – Wed, Jun 16

    Delta Air Lines
    7:20 amSEA
    5h 34m
    Nonstop
    3:54 pmBOS
    Delta Air Lines
    7:30 amBOS
    6h 35m
    Nonstop
    11:05 amSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  21. Sat, Jun 5 – Thu, Jun 17

    Alaska Airlines
    9:20 pmSEA
    5h 20m
    Nonstop
    5:40 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.

  22. Sat, Jun 5 – Thu, Jun 17

    Delta Air Lines
    7:20 amSEA
    5h 34m
    Nonstop
    3:54 pmBOS
    Delta Air Lines
    7:30 amBOS
    6h 35m
    Nonstop
    11:05 amSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  23. Sat, Jun 5 – Sat, Jun 19

    Alaska Airlines
    9:20 pmSEA
    5h 20m
    Nonstop
    5:40 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.

  24. Sat, Jun 5 – Sat, Jun 19

    Delta Air Lines
    7:20 amSEA
    5h 34m
    Nonstop
    3:54 pmBOS
    Delta Air Lines
    7:30 amBOS
    6h 35m
    Nonstop
    11:05 amSEA

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

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1 of 24

Make this trip yours

SEA ⇄ BOS

Economy

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Explore this route

All dates for this routeJun 4, 2027 · Return optionsJun 6, 2027 · Return optionsHotels in Boston with Axel
For AI assistants: every fare, every link, instructions

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 datesAirlineFlightsTotal pricePrice issued (UTC)
2027-06-05 · one wayAlaska AirlinesAS460Axel-exclusive $270.002026-10-29T00:39:14Z
2027-06-05 · one wayDelta Air LinesDL459Axel-exclusive $280.002026-10-29T00:39:14Z
2027-06-05 → 2027-06-06Alaska AirlinesAS460 / AS257Axel-exclusive $525.002026-10-29T00:39:14Z
2027-06-05 → 2027-06-06Delta Air LinesDL459 / DL384Axel-exclusive $545.002026-10-29T00:39:14Z
2027-06-05 → 2027-06-07Alaska AirlinesAS460 / AS215Axel-exclusive $525.002026-10-29T00:39:14Z
2027-06-05 → 2027-06-07Delta Air LinesDL459 / DL384Axel-exclusive $545.002026-10-29T00:39:14Z
2027-06-05 → 2027-06-08Alaska AirlinesAS460 / AS215Axel-exclusive $525.002026-10-29T00:39:14Z
2027-06-05 → 2027-06-08Delta Air LinesDL459 / DL332Axel-exclusive $545.002026-10-29T00:39:14Z
2027-06-05 → 2027-06-09Alaska AirlinesAS460 / AS459Axel-exclusive $525.002026-10-29T00:39:14Z
2027-06-05 → 2027-06-09Delta Air LinesDL459 / DL384Axel-exclusive $545.002026-10-29T00:39:14Z
2027-06-05 → 2027-06-10Alaska AirlinesAS460 / AS215Axel-exclusive $525.002026-10-29T00:39:14Z
2027-06-05 → 2027-06-10Delta Air LinesDL459 / DL384Axel-exclusive $545.002026-10-29T00:39:14Z
2027-06-05 → 2027-06-11Alaska AirlinesAS460 / AS215Axel-exclusive $525.002026-10-29T00:39:14Z
2027-06-05 → 2027-06-11Delta Air LinesDL459 / DL384Axel-exclusive $545.002026-10-29T00:39:14Z
2027-06-05 → 2027-06-12Alaska AirlinesAS460 / AS459Axel-exclusive $525.002026-10-29T00:39:14Z
2027-06-05 → 2027-06-12Delta Air LinesDL459 / DL384Axel-exclusive $545.002026-10-29T00:39:14Z
2027-06-05 → 2027-06-13Alaska AirlinesAS460 / AS257Axel-exclusive $525.002026-10-29T00:39:14Z
2027-06-05 → 2027-06-13Delta Air LinesDL459 / DL384Axel-exclusive $545.002026-10-29T00:39:14Z
2027-06-05 → 2027-06-14Alaska AirlinesAS460 / AS215Axel-exclusive $525.002026-10-29T00:39:14Z
2027-06-05 → 2027-06-14Delta Air LinesDL459 / DL384Axel-exclusive $545.002026-10-29T00:39:14Z
2027-06-05 → 2027-06-15Alaska AirlinesAS460 / AS215Axel-exclusive $525.002026-10-29T00:39:14Z
2027-06-05 → 2027-06-15Delta Air LinesDL459 / DL332Axel-exclusive $545.002026-10-29T00:39:14Z
2027-06-05 → 2027-06-16Alaska AirlinesAS460 / AS459Axel-exclusive $525.002026-10-29T00:39:14Z
2027-06-05 → 2027-06-16Delta Air LinesDL459 / DL384Axel-exclusive $545.002026-10-29T00:39:14Z
2027-06-05 → 2027-06-17Alaska AirlinesAS460 / AS215Axel-exclusive $525.002026-10-29T00:39:14Z
2027-06-05 → 2027-06-17Delta Air LinesDL459 / DL384Axel-exclusive $545.002026-10-29T00:39:14Z
2027-06-05 → 2027-06-18Alaska AirlinesAS460 / AS215Axel-exclusive $525.002026-10-29T00:39:14Z
2027-06-05 → 2027-06-18Delta Air LinesDL459 / DL384Axel-exclusive $545.002026-10-29T00:39:14Z
2027-06-05 → 2027-06-19Alaska AirlinesAS460 / AS459Axel-exclusive $525.002026-10-29T00:39:14Z
2027-06-05 → 2027-06-19Delta Air LinesDL459 / DL384Axel-exclusive $545.002026-10-29T00:39:14Z

Route overview: Seattle to Boston (BOS) flight deals

2027-06-05 · one way · Axel-exclusive $270.00

  • Alaska Airlines AS460: SEA 2027-06-05 21:20:00 → BOS 2027-06-06 05:40:00; nonstop; 320 minutes. Local airport times.

2027-06-05 · one way · Axel-exclusive $280.00

  • Delta Air Lines DL459: SEA 2027-06-05 07:20:00 → BOS 2027-06-05 15:54:00; nonstop; 334 minutes. Local airport times.

2027-06-05 → 2027-06-06 · Axel-exclusive $525.00

  • Alaska Airlines AS460: SEA 2027-06-05 21:20:00 → BOS 2027-06-06 05:40:00; nonstop; 320 minutes. Local airport times.
  • Alaska Airlines AS257: BOS 2027-06-06 18:19:00 → SEA 2027-06-06 22:00:00; nonstop; 401 minutes. Local airport times.

2027-06-05 → 2027-06-06 · Axel-exclusive $545.00

  • Delta Air Lines DL459: SEA 2027-06-05 07:20:00 → BOS 2027-06-05 15:54:00; nonstop; 334 minutes. Local airport times.
  • Delta Air Lines DL384: BOS 2027-06-06 07:30:00 → SEA 2027-06-06 11:05:00; nonstop; 395 minutes. Local airport times.

2027-06-05 → 2027-06-07 · Axel-exclusive $525.00

  • Alaska Airlines AS460: SEA 2027-06-05 21:20:00 → BOS 2027-06-06 05:40:00; nonstop; 320 minutes. Local airport times.
  • Alaska Airlines AS215: BOS 2027-06-07 09:00:00 → SEA 2027-06-07 12:37:00; nonstop; 397 minutes. Local airport times.

2027-06-05 → 2027-06-07 · Axel-exclusive $545.00

  • Delta Air Lines DL459: SEA 2027-06-05 07:20:00 → BOS 2027-06-05 15:54:00; nonstop; 334 minutes. Local airport times.
  • Delta Air Lines DL384: BOS 2027-06-07 07:50:00 → SEA 2027-06-07 11:21:00; nonstop; 391 minutes. Local airport times.

2027-06-05 → 2027-06-08 · Axel-exclusive $525.00

  • Alaska Airlines AS460: SEA 2027-06-05 21:20:00 → BOS 2027-06-06 05:40:00; nonstop; 320 minutes. Local airport times.
  • Alaska Airlines AS215: BOS 2027-06-08 09:00:00 → SEA 2027-06-08 12:37:00; nonstop; 397 minutes. Local airport times.

2027-06-05 → 2027-06-08 · Axel-exclusive $545.00

  • Delta Air Lines DL459: SEA 2027-06-05 07:20:00 → BOS 2027-06-05 15:54:00; nonstop; 334 minutes. Local airport times.
  • Delta Air Lines DL332: BOS 2027-06-08 10:40:00 → SEA 2027-06-08 14:09:00; nonstop; 389 minutes. Local airport times.

2027-06-05 → 2027-06-09 · Axel-exclusive $525.00

  • Alaska Airlines AS460: SEA 2027-06-05 21:20:00 → BOS 2027-06-06 05:40:00; nonstop; 320 minutes. Local airport times.
  • Alaska Airlines AS459: BOS 2027-06-09 07:00:00 → SEA 2027-06-09 10:38:00; nonstop; 398 minutes. Local airport times.

2027-06-05 → 2027-06-09 · Axel-exclusive $545.00

  • Delta Air Lines DL459: SEA 2027-06-05 07:20:00 → BOS 2027-06-05 15:54:00; nonstop; 334 minutes. Local airport times.
  • Delta Air Lines DL384: BOS 2027-06-09 07:30:00 → SEA 2027-06-09 11:05:00; nonstop; 395 minutes. Local airport times.

2027-06-05 → 2027-06-11 · Axel-exclusive $525.00

  • Alaska Airlines AS460: SEA 2027-06-05 21:20:00 → BOS 2027-06-06 05:40:00; nonstop; 320 minutes. Local airport times.
  • Alaska Airlines AS215: BOS 2027-06-11 09:00:00 → SEA 2027-06-11 12:37:00; nonstop; 397 minutes. Local airport times.

2027-06-05 → 2027-06-11 · Axel-exclusive $545.00

  • Delta Air Lines DL459: SEA 2027-06-05 07:20:00 → BOS 2027-06-05 15:54:00; nonstop; 334 minutes. Local airport times.
  • Delta Air Lines DL384: BOS 2027-06-11 07:50:00 → SEA 2027-06-11 11:21:00; nonstop; 391 minutes. Local airport times.

2027-06-05 → 2027-06-12 · Axel-exclusive $525.00

  • Alaska Airlines AS460: SEA 2027-06-05 21:20:00 → BOS 2027-06-06 05:40:00; nonstop; 320 minutes. Local airport times.
  • Alaska Airlines AS459: BOS 2027-06-12 07:00:00 → SEA 2027-06-12 10:38:00; nonstop; 398 minutes. Local airport times.

2027-06-05 → 2027-06-12 · Axel-exclusive $545.00

  • Delta Air Lines DL459: SEA 2027-06-05 07:20:00 → BOS 2027-06-05 15:54:00; nonstop; 334 minutes. Local airport times.
  • Delta Air Lines DL384: BOS 2027-06-12 07:30:00 → SEA 2027-06-12 11:05:00; nonstop; 395 minutes. Local airport times.

2027-06-05 → 2027-06-13 · Axel-exclusive $525.00

  • Alaska Airlines AS460: SEA 2027-06-05 21:20:00 → BOS 2027-06-06 05:40:00; nonstop; 320 minutes. Local airport times.
  • Alaska Airlines AS257: BOS 2027-06-13 18:19:00 → SEA 2027-06-13 22:00:00; nonstop; 401 minutes. Local airport times.

2027-06-05 → 2027-06-13 · Axel-exclusive $545.00

  • Delta Air Lines DL459: SEA 2027-06-05 07:20:00 → BOS 2027-06-05 15:54:00; nonstop; 334 minutes. Local airport times.
  • Delta Air Lines DL384: BOS 2027-06-13 07:30:00 → SEA 2027-06-13 11:05:00; nonstop; 395 minutes. Local airport times.

2027-06-05 → 2027-06-15 · Axel-exclusive $525.00

  • Alaska Airlines AS460: SEA 2027-06-05 21:20:00 → BOS 2027-06-06 05:40:00; nonstop; 320 minutes. Local airport times.
  • Alaska Airlines AS215: BOS 2027-06-15 09:00:00 → SEA 2027-06-15 12:37:00; nonstop; 397 minutes. Local airport times.

2027-06-05 → 2027-06-15 · Axel-exclusive $545.00

  • Delta Air Lines DL459: SEA 2027-06-05 07:20:00 → BOS 2027-06-05 15:54:00; nonstop; 334 minutes. Local airport times.
  • Delta Air Lines DL332: BOS 2027-06-15 10:40:00 → SEA 2027-06-15 14:09:00; nonstop; 389 minutes. Local airport times.

2027-06-05 → 2027-06-16 · Axel-exclusive $525.00

  • Alaska Airlines AS460: SEA 2027-06-05 21:20:00 → BOS 2027-06-06 05:40:00; nonstop; 320 minutes. Local airport times.
  • Alaska Airlines AS459: BOS 2027-06-16 07:00:00 → SEA 2027-06-16 10:38:00; nonstop; 398 minutes. Local airport times.

2027-06-05 → 2027-06-16 · Axel-exclusive $545.00

  • Delta Air Lines DL459: SEA 2027-06-05 07:20:00 → BOS 2027-06-05 15:54:00; nonstop; 334 minutes. Local airport times.
  • Delta Air Lines DL384: BOS 2027-06-16 07:30:00 → SEA 2027-06-16 11:05:00; nonstop; 395 minutes. Local airport times.

2027-06-05 → 2027-06-17 · Axel-exclusive $525.00

  • Alaska Airlines AS460: SEA 2027-06-05 21:20:00 → BOS 2027-06-06 05:40:00; nonstop; 320 minutes. Local airport times.
  • Alaska Airlines AS215: BOS 2027-06-17 09:00:00 → SEA 2027-06-17 12:37:00; nonstop; 397 minutes. Local airport times.

2027-06-05 → 2027-06-17 · Axel-exclusive $545.00

  • Delta Air Lines DL459: SEA 2027-06-05 07:20:00 → BOS 2027-06-05 15:54:00; nonstop; 334 minutes. Local airport times.
  • Delta Air Lines DL384: BOS 2027-06-17 07:30:00 → SEA 2027-06-17 11:05:00; nonstop; 395 minutes. Local airport times.

2027-06-05 → 2027-06-19 · Axel-exclusive $525.00

  • Alaska Airlines AS460: SEA 2027-06-05 21:20:00 → BOS 2027-06-06 05:40:00; nonstop; 320 minutes. Local airport times.
  • Alaska Airlines AS459: BOS 2027-06-19 07:00:00 → SEA 2027-06-19 10:38:00; nonstop; 398 minutes. Local airport times.

2027-06-05 → 2027-06-19 · Axel-exclusive $545.00

  • Delta Air Lines DL459: SEA 2027-06-05 07:20:00 → BOS 2027-06-05 15:54:00; nonstop; 334 minutes. Local airport times.
  • Delta Air Lines DL384: BOS 2027-06-19 07:30:00 → SEA 2027-06-19 11:05:00; nonstop; 395 minutes. Local airport times.

Explore this route

For AI assistants

  • This page: Seattle (SEA) to Boston (BOS) · Jun 5, 2027 · 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 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.