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Boston → Seattle

Dec 13, 2026 · return Dec 23, 2026

BOS → SEA1 adulteconomyRound trip

10 flight options · 5 airlines

Nonstop flights

Sun, Dec 13 – Wed, Dec 23

Alaska Airlines
6:22 pmBOS
6h 38m
Nonstop
10:00 pmSEA
Alaska Airlines
3:40 pmSEA
5h 19m
Nonstop
11:59 pmBOS

Round-trip total · 1 adult · Taxes included

Sun, Dec 13 – Wed, Dec 23

Delta Air Lines
7:50 amBOS
6h 31m
Nonstop
11:21 amSEA
Delta Air Lines
3:45 pmSEA
5h 9m
Nonstop
11:54 pmBOS

Round-trip total · 1 adult · Taxes included

Sun, Dec 13 – Wed, Dec 23

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

Round-trip total · 1 adult · Taxes included

Sun, Dec 13 – Wed, Dec 23

Delta Air Lines
7:26 pmBOS
6h 29m
Nonstop
10:55 pmSEA
Delta Air Lines
3:45 pmSEA
5h 9m
Nonstop
11:54 pmBOS

Round-trip total · 1 adult · Taxes included

One-stop flights

Sun, Dec 13 – Wed, Dec 23

Sun Country Airlines
11:43 amBOS
8h 34m
MSP · 1h 24m
5:17 pmSEA
Alaska Airlines
3:40 pmSEA
5h 19m
Nonstop
11:59 pmBOS

Round-trip total · 1 adult · Taxes included

Sun, Dec 13 – Wed, Dec 23

Southwest Airlines
4:40 pmBOS
9h 10m
DEN · 1h 20m
10:50 pmSEA
Alaska Airlines
3:40 pmSEA
5h 19m
Nonstop
11:59 pmBOS

Round-trip total · 1 adult · Taxes included

Sun, Dec 13 – Wed, Dec 23

United Airlines
3:42 pmBOS
9h 7m
EWR · 1h 17m
9:49 pmSEA
Alaska Airlines
3:40 pmSEA
5h 19m
Nonstop
11:59 pmBOS

Round-trip total · 1 adult · Taxes included

Sun, Dec 13 – Wed, Dec 23

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

Sun, Dec 13 – Wed, Dec 23

Delta Air Lines
5:30 amBOS
8h 39m
DTW · 1h 3m
11:09 amSEA
Delta Air Lines
3:45 pmSEA
5h 9m
Nonstop
11:54 pmBOS

Round-trip total · 1 adult · Taxes included

Sun, Dec 13 – Wed, Dec 23

Delta Air Lines
3:05 pmBOS
8h 44m
MSP · 1h 21m
8:49 pmSEA
Delta Air Lines
3:45 pmSEA
5h 9m
Nonstop
11:54 pmBOS

Round-trip total · 1 adult · Taxes included

Make this trip yours

BOS ⇄ SEA

Economy

Adults 12+ · Children 2–11. For infants under 2, tell Axel after you see prices.

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Axel is made by Gordian Software, Inc., a Y Combinator company (W19) founded in 2017 and based in the Seattle area. The company is led by CEO Stephen Grabowski, formerly of Skyscanner. How Axel works · About

More dates

All dates for this routeNov 24, 2026 → Nov 29, 2026Dec 22, 2026 → Dec 27, 2026Dec 30, 2026 → Jan 2, 2027Jan 15, 2027 → Jan 18, 2027Oct 30, 2026 → Nov 2, 2026Oct 31, 2026 → Nov 7, 2026Nov 27, 2026 → Nov 30, 2026Nov 28, 2026 → Dec 5, 2026Dec 25, 2026 → Dec 28, 2026Dec 26, 2026 → Jan 2, 2027Jan 22, 2027 → Jan 25, 2027Oct 30, 2026 · One way
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.

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-12-13 → 2026-12-23Alaska AirlinesAS257 / AS460$492.002026-10-29T00:52:47Z
2026-12-13 → 2026-12-23Delta Air LinesDL384 / DL474$510.002026-10-29T00:52:47Z
2026-12-13 → 2026-12-23Sun Country Airlines / Alaska AirlinesSY252 + SY285 / AS460$434.502026-10-29T00:52:47Z
2026-12-13 → 2026-12-23Southwest Airlines / Alaska AirlinesWN1590 + WN3141 / AS460$467.002026-10-29T00:52:47Z
2026-12-13 → 2026-12-23United Airlines / Alaska AirlinesUA546 + UA2614 / AS460$482.002026-10-29T00:52:47Z
2026-12-13 → 2026-12-23Alaska AirlinesAS215 / AS460$492.002026-10-29T00:52:47Z
2026-12-13 → 2026-12-23Delta Air LinesDL797 / DL474$510.002026-10-29T00:52:47Z
2026-12-13 → 2026-12-23Southwest Airlines / Alaska AirlinesWN816 + WN3032 / AS460$467.002026-10-29T00:52:47Z
2026-12-13 → 2026-12-23Delta Air LinesDL1019 + DL734 / DL474$492.502026-10-29T00:52:47Z
2026-12-13 → 2026-12-23Delta Air LinesDL1127 + DL881 / DL474$492.502026-10-29T00:52:47Z

2026-12-13 → 2026-12-23 · $492.00

  • Alaska Airlines AS257: BOS 2026-12-13 18:22:00 → SEA 2026-12-13 22:00:00; nonstop; 398 minutes. Local airport times.
  • Alaska Airlines AS460: SEA 2026-12-23 15:40:00 → BOS 2026-12-23 23:59:00; nonstop; 319 minutes. Local airport times.

2026-12-13 → 2026-12-23 · $510.00

  • Delta Air Lines DL384: BOS 2026-12-13 07:50:00 → SEA 2026-12-13 11:21:00; nonstop; 391 minutes. Local airport times.
  • Delta Air Lines DL474: SEA 2026-12-23 15:45:00 → BOS 2026-12-23 23:54:00; nonstop; 309 minutes. Local airport times.

2026-12-13 → 2026-12-23 · $434.50

  • Sun Country Airlines SY252 / SY285: BOS 2026-12-13 11:43:00 → SEA 2026-12-13 17:17:00; 1 stop(s) via MSP; 514 minutes. Local airport times.
    • SY252: BOS 2026-12-13 11:43:00 → MSP 2026-12-13 14:01:00; layover at MSP: 84 minutes.
    • SY285: MSP 2026-12-13 15:25:00 → SEA 2026-12-13 17:17:00.
  • Alaska Airlines AS460: SEA 2026-12-23 15:40:00 → BOS 2026-12-23 23:59:00; nonstop; 319 minutes. Local airport times.

2026-12-13 → 2026-12-23 · $467.00

  • Southwest Airlines WN1590 / WN3141: BOS 2026-12-13 16:40:00 → SEA 2026-12-13 22:50:00; 1 stop(s) via DEN; 550 minutes. Local airport times.
    • WN1590: BOS 2026-12-13 16:40:00 → DEN 2026-12-13 19:20:00; layover at DEN: 80 minutes.
    • WN3141: DEN 2026-12-13 20:40:00 → SEA 2026-12-13 22:50:00.
  • Alaska Airlines AS460: SEA 2026-12-23 15:40:00 → BOS 2026-12-23 23:59:00; nonstop; 319 minutes. Local airport times.

2026-12-13 → 2026-12-23 · $482.00

  • United Airlines UA546 / UA2614: BOS 2026-12-13 15:42:00 → SEA 2026-12-13 21:49:00; 1 stop(s) via EWR; 547 minutes. Local airport times.
    • UA546: BOS 2026-12-13 15:42:00 → EWR 2026-12-13 17:08:00; layover at EWR: 77 minutes.
    • UA2614: EWR 2026-12-13 18:25:00 → SEA 2026-12-13 21:49:00.
  • Alaska Airlines AS460: SEA 2026-12-23 15:40:00 → BOS 2026-12-23 23:59:00; nonstop; 319 minutes. Local airport times.

2026-12-13 → 2026-12-23 · $492.00

  • Alaska Airlines AS215: BOS 2026-12-13 09:00:00 → SEA 2026-12-13 12:37:00; nonstop; 397 minutes. Local airport times.
  • Alaska Airlines AS460: SEA 2026-12-23 15:40:00 → BOS 2026-12-23 23:59:00; nonstop; 319 minutes. Local airport times.

2026-12-13 → 2026-12-23 · $510.00

  • Delta Air Lines DL797: BOS 2026-12-13 19:26:00 → SEA 2026-12-13 22:55:00; nonstop; 389 minutes. Local airport times.
  • Delta Air Lines DL474: SEA 2026-12-23 15:45:00 → BOS 2026-12-23 23:54:00; nonstop; 309 minutes. Local airport times.

2026-12-13 → 2026-12-23 · $467.00

  • Southwest Airlines WN816 / WN3032: BOS 2026-12-13 17:55:00 → SEA 2026-12-13 23:35:00; 1 stop(s) via MDW; 520 minutes. Local airport times.
    • WN816: BOS 2026-12-13 17:55:00 → MDW 2026-12-13 19:40:00; layover at MDW: 65 minutes.
    • WN3032: MDW 2026-12-13 20:45:00 → SEA 2026-12-13 23:35:00.
  • Alaska Airlines AS460: SEA 2026-12-23 15:40:00 → BOS 2026-12-23 23:59:00; nonstop; 319 minutes. Local airport times.

2026-12-13 → 2026-12-23 · $492.50

  • Delta Air Lines DL1019 / DL734: BOS 2026-12-13 05:30:00 → SEA 2026-12-13 11:09:00; 1 stop(s) via DTW; 519 minutes. Local airport times.
    • DL1019: BOS 2026-12-13 05:30:00 → DTW 2026-12-13 07:52:00; layover at DTW: 63 minutes.
    • DL734: DTW 2026-12-13 08:55:00 → SEA 2026-12-13 11:09:00.
  • Delta Air Lines DL474: SEA 2026-12-23 15:45:00 → BOS 2026-12-23 23:54:00; nonstop; 309 minutes. Local airport times.

2026-12-13 → 2026-12-23 · $492.50

  • Delta Air Lines DL1127 / DL881: BOS 2026-12-13 15:05:00 → SEA 2026-12-13 20:49:00; 1 stop(s) via MSP; 524 minutes. Local airport times.
    • DL1127: BOS 2026-12-13 15:05:00 → MSP 2026-12-13 17:25:00; layover at MSP: 81 minutes.
    • DL881: MSP 2026-12-13 18:46:00 → SEA 2026-12-13 20:49:00.
  • Delta Air Lines DL474: SEA 2026-12-23 15:45:00 → BOS 2026-12-23 23:54:00; nonstop; 309 minutes. Local airport times.

More dates for this route