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Seattle → Boston

Aug 21, 2027 · return Aug 25, 2027

SEA → BOS1 adulteconomyRound trip

9 flight options · 3 airlines

Nonstop flights

Sat, Aug 21 – Wed, Aug 25

Alaska Airlines
11:22 pmSEA
5h 18m
Nonstop
7:40 am+1BOS
Alaska Airlines
5:44 pmBOS
6h 24m
Nonstop
9:08 pmSEA

Round-trip total · 1 adult · Taxes included

Sat, Aug 21 – Wed, Aug 25

Delta Air Lines
11:15 pmSEA
5h 21m
Nonstop
7:36 am+1BOS
Delta Air Lines
3:45 pmBOS
6h 21m
Nonstop
7:06 pmSEA

Round-trip total · 1 adult · Taxes included

Sat, Aug 21 – Wed, Aug 25

Alaska Airlines
3:35 pmSEA
5h 24m
Nonstop
11:59 pmBOS
Alaska Airlines
5:44 pmBOS
6h 24m
Nonstop
9:08 pmSEA

Round-trip total · 1 adult · Taxes included

One-stop flights

Sat, Aug 21 – Wed, Aug 25

American Airlines
11:59 pmSEA
7h 33m
ORD · 1h 4m
10:32 am+1BOS
Alaska Airlines
5:44 pmBOS
6h 24m
Nonstop
9:08 pmSEA

Round-trip total · 1 adult · Taxes included

Sat, Aug 21 – Wed, Aug 25

Delta Air Lines
1:25 pmSEA
7h 32m
SLC · 1h 10m
11:57 pmBOS
Delta Air Lines
5:30 amBOS
8h 39m
DTW · 1h 3m
11:09 amSEA

Round-trip total · 1 adult · Taxes included

Sat, Aug 21 – Wed, Aug 25

Alaska Airlines
2:02 pmSEA
7h 19m
DCA · 1h
12:21 am+1BOS
Alaska Airlines
5:44 pmBOS
6h 24m
Nonstop
9:08 pmSEA

Round-trip total · 1 adult · Taxes included

Sat, Aug 21 – Wed, Aug 25

Alaska Airlines
9:16 amSEA
7h 39m
STL · 1h 9m
7:55 pmBOS
Alaska Airlines
5:44 pmBOS
6h 24m
Nonstop
9:08 pmSEA

Round-trip total · 1 adult · Taxes included

Sat, Aug 21 – Wed, Aug 25

Alaska Airlines
7:54 pmSEA
7h 26m
PDX · 1h 9m
6:20 am+1BOS
Alaska Airlines
5:44 pmBOS
6h 24m
Nonstop
9:08 pmSEA

Round-trip total · 1 adult · Taxes included

Sat, Aug 21 – Wed, Aug 25

Delta Air Lines
11:07 pmSEA
5h 13m
Nonstop
7:20 am+1BOS
Delta Air Lines
5:30 amBOS
8h 39m
DTW · 1h 3m
11:09 amSEA

Round-trip total · 1 adult · Taxes included

Make this trip yours

SEA ⇄ BOS

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 20, 2026 → Nov 23, 2026Nov 27, 2026 → Dec 4, 2026Nov 20, 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)
2027-08-21 → 2027-08-25Alaska AirlinesAS214 / AS257$525.002026-10-29T00:39:14Z
2027-08-21 → 2027-08-25Delta Air LinesDL473 / DL2889$545.002026-10-29T00:39:14Z
2027-08-21 → 2027-08-25American Airlines / Alaska AirlinesAA2379 + AA2089 / AS257$492.502026-10-29T00:39:14Z
2027-08-21 → 2027-08-25Alaska AirlinesAS460 / AS257$525.002026-10-29T00:39:14Z
2027-08-21 → 2027-08-25Delta Air LinesDL1120 + DL702 / DL1019 + DL734$490.002026-10-29T00:39:14Z
2027-08-21 → 2027-08-25Alaska AirlinesAS2 + AA1152 / AS257$502.502026-10-29T00:39:14Z
2027-08-21 → 2027-08-25Alaska AirlinesAS314 + AA4801 / AS257$502.502026-10-29T00:39:14Z
2027-08-21 → 2027-08-25Alaska AirlinesAS2239 + AS436 / AS257$502.502026-10-29T00:39:14Z
2027-08-21 → 2027-08-25Delta Air LinesDL473 / DL1019 + DL734$517.502026-10-29T00:39:14Z

2027-08-21 → 2027-08-25 · $525.00

  • Alaska Airlines AS214: SEA 2027-08-21 23:22:00 → BOS 2027-08-22 07:40:00; nonstop; 318 minutes. Local airport times.
  • Alaska Airlines AS257: BOS 2027-08-25 17:44:00 → SEA 2027-08-25 21:08:00; nonstop; 384 minutes. Local airport times.

2027-08-21 → 2027-08-25 · $545.00

  • Delta Air Lines DL473: SEA 2027-08-21 23:15:00 → BOS 2027-08-22 07:36:00; nonstop; 321 minutes. Local airport times.
  • Delta Air Lines DL2889: BOS 2027-08-25 15:45:00 → SEA 2027-08-25 19:06:00; nonstop; 381 minutes. Local airport times.

2027-08-21 → 2027-08-25 · $492.50

  • American Airlines AA2379 / AA2089: SEA 2027-08-21 23:59:00 → BOS 2027-08-22 10:32:00; 1 stop(s) via ORD; 453 minutes. Local airport times.
    • AA2379: SEA 2027-08-21 23:59:00 → ORD 2027-08-22 05:55:00; layover at ORD: 64 minutes.
    • AA2089: ORD 2027-08-22 06:59:00 → BOS 2027-08-22 10:32:00.
  • Alaska Airlines AS257: BOS 2027-08-25 17:44:00 → SEA 2027-08-25 21:08:00; nonstop; 384 minutes. Local airport times.

2027-08-21 → 2027-08-25 · $525.00

  • Alaska Airlines AS460: SEA 2027-08-21 15:35:00 → BOS 2027-08-21 23:59:00; nonstop; 324 minutes. Local airport times.
  • Alaska Airlines AS257: BOS 2027-08-25 17:44:00 → SEA 2027-08-25 21:08:00; nonstop; 384 minutes. Local airport times.

2027-08-21 → 2027-08-25 · $490.00

  • Delta Air Lines DL1120 / DL702: SEA 2027-08-21 13:25:00 → BOS 2027-08-21 23:57:00; 1 stop(s) via SLC; 452 minutes. Local airport times.
    • DL1120: SEA 2027-08-21 13:25:00 → SLC 2027-08-21 16:26:00; layover at SLC: 70 minutes.
    • DL702: SLC 2027-08-21 17:36:00 → BOS 2027-08-21 23:57:00.
  • Delta Air Lines DL1019 / DL734: BOS 2027-08-25 05:30:00 → SEA 2027-08-25 11:09:00; 1 stop(s) via DTW; 519 minutes. Local airport times.
    • DL1019: BOS 2027-08-25 05:30:00 → DTW 2027-08-25 07:52:00; layover at DTW: 63 minutes.
    • DL734: DTW 2027-08-25 08:55:00 → SEA 2027-08-25 11:09:00.

2027-08-21 → 2027-08-25 · $502.50

  • Alaska Airlines AS2 / AA1152: SEA 2027-08-21 14:02:00 → BOS 2027-08-22 00:21:00; 1 stop(s) via DCA; 439 minutes. Local airport times.
    • AS2: SEA 2027-08-21 14:02:00 → DCA 2027-08-21 21:59:00; layover at DCA: 60 minutes.
    • AA1152: DCA 2027-08-21 22:59:00 → BOS 2027-08-22 00:21:00.
  • Alaska Airlines AS257: BOS 2027-08-25 17:44:00 → SEA 2027-08-25 21:08:00; nonstop; 384 minutes. Local airport times.

2027-08-21 → 2027-08-25 · $502.50

  • Alaska Airlines AS314 / AA4801: SEA 2027-08-21 09:16:00 → BOS 2027-08-21 19:55:00; 1 stop(s) via STL; 459 minutes. Local airport times.
    • AS314: SEA 2027-08-21 09:16:00 → STL 2027-08-21 15:06:00; layover at STL: 69 minutes.
    • AA4801: STL 2027-08-21 16:15:00 → BOS 2027-08-21 19:55:00.
  • Alaska Airlines AS257: BOS 2027-08-25 17:44:00 → SEA 2027-08-25 21:08:00; nonstop; 384 minutes. Local airport times.

2027-08-21 → 2027-08-25 · $502.50

  • Alaska Airlines AS2239 / AS436: SEA 2027-08-21 19:54:00 → BOS 2027-08-22 06:20:00; 1 stop(s) via PDX; 446 minutes. Local airport times.
    • AS2239: SEA 2027-08-21 19:54:00 → PDX 2027-08-21 20:50:00; layover at PDX: 69 minutes.
    • AS436: PDX 2027-08-21 21:59:00 → BOS 2027-08-22 06:20:00.
  • Alaska Airlines AS257: BOS 2027-08-25 17:44:00 → SEA 2027-08-25 21:08:00; nonstop; 384 minutes. Local airport times.

2027-08-21 → 2027-08-25 · $517.50

  • Delta Air Lines DL473: SEA 2027-08-21 23:07:00 → BOS 2027-08-22 07:20:00; nonstop; 313 minutes. Local airport times.
  • Delta Air Lines DL1019 / DL734: BOS 2027-08-25 05:30:00 → SEA 2027-08-25 11:09:00; 1 stop(s) via DTW; 519 minutes. Local airport times.
    • DL1019: BOS 2027-08-25 05:30:00 → DTW 2027-08-25 07:52:00; layover at DTW: 63 minutes.
    • DL734: DTW 2027-08-25 08:55:00 → SEA 2027-08-25 11:09:00.

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