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Seattle → Boston

Jun 19, 2027 · return Jun 29, 2027

SEA → BOS1 adulteconomyRound trip

10 flight options · 3 airlines

Nonstop flights

Sat, Jun 19 – Tue, Jun 29

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

Round-trip total · 1 adult · Taxes included

Sat, Jun 19 – Tue, Jun 29

Delta Air Lines
11:07 pmSEA
5h 13m
Nonstop
7:20 am+1BOS
Delta Air Lines
3:45 pmBOS
6h 21m
Nonstop
7:06 pmSEA

Round-trip total · 1 adult · Taxes included

Sat, Jun 19 – Tue, Jun 29

Alaska Airlines
3:35 pmSEA
5h 24m
Nonstop
11:59 pmBOS
Alaska Airlines
9:03 amBOS
6h 24m
Nonstop
12:27 pmSEA

Round-trip total · 1 adult · Taxes included

Sat, Jun 19 – Tue, Jun 29

Delta Air Lines
3:55 pmSEA
5h 18m
Nonstop
12:13 am+1BOS
Delta Air Lines
3:45 pmBOS
6h 21m
Nonstop
7:06 pmSEA

Round-trip total · 1 adult · Taxes included

One-stop flights

Sat, Jun 19 – Tue, Jun 29

American Airlines
11:59 pmSEA
7h 33m
ORD · 1h 4m
10:32 am+1BOS
Delta Air Lines
3:45 pmBOS
6h 21m
Nonstop
7:06 pmSEA

Round-trip total · 1 adult · Taxes included

Sat, Jun 19 – Tue, Jun 29

Alaska Airlines
7:54 pmSEA
7h 26m
PDX · 1h 9m
6:20 am+1BOS
Alaska Airlines
9:03 amBOS
6h 24m
Nonstop
12:27 pmSEA

Round-trip total · 1 adult · Taxes included

Sat, Jun 19 – Tue, Jun 29

Alaska Airlines
9:16 amSEA
7h 39m
STL · 1h 9m
7:55 pmBOS
Alaska Airlines
9:03 amBOS
6h 24m
Nonstop
12:27 pmSEA

Round-trip total · 1 adult · Taxes included

Sat, Jun 19 – Tue, Jun 29

American Airlines
12:34 pmSEA
7h 39m
PHL · 1h 15m
11:13 pmBOS
Delta Air Lines
3:45 pmBOS
6h 21m
Nonstop
7:06 pmSEA

Round-trip total · 1 adult · Taxes included

Sat, Jun 19 – Tue, Jun 29

Alaska Airlines
2:02 pmSEA
7h 19m
DCA · 1h
12:21 am+1BOS
Alaska Airlines
9:03 amBOS
6h 24m
Nonstop
12:27 pmSEA

Round-trip total · 1 adult · Taxes included

Sat, Jun 19 – Tue, Jun 29

Delta Air Lines
1:25 pmSEA
7h 32m
SLC · 1h 10m
11:57 pmBOS
Delta Air Lines
3:45 pmBOS
6h 21m
Nonstop
7:06 pmSEA

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)
2027-06-19 → 2027-06-29Alaska AirlinesAS214 / AS215$525.002026-10-29T00:39:14Z
2027-06-19 → 2027-06-29Delta Air LinesDL473 / DL2889$545.002026-10-29T00:39:14Z
2027-06-19 → 2027-06-29American Airlines / Delta Air LinesAA2379 + AA2089 / DL2889$502.502026-10-29T00:39:14Z
2027-06-19 → 2027-06-29Alaska AirlinesAS460 / AS215$525.002026-10-29T00:39:14Z
2027-06-19 → 2027-06-29Delta Air LinesDL876 / DL2889$545.002026-10-29T00:39:14Z
2027-06-19 → 2027-06-29Alaska AirlinesAS2239 + AS436 / AS215$502.502026-10-29T00:39:14Z
2027-06-19 → 2027-06-29Alaska AirlinesAS314 + AA4801 / AS215$502.502026-10-29T00:39:14Z
2027-06-19 → 2027-06-29American Airlines / Delta Air LinesAA2203 + AA1874 / DL2889$502.502026-10-29T00:39:14Z
2027-06-19 → 2027-06-29Alaska AirlinesAS2 + AA1152 / AS215$502.502026-10-29T00:39:14Z
2027-06-19 → 2027-06-29Delta Air LinesDL1120 + DL702 / DL2889$517.502026-10-29T00:39:14Z

2027-06-19 → 2027-06-29 · $525.00

  • Alaska Airlines AS214: SEA 2027-06-19 23:22:00 → BOS 2027-06-20 07:40:00; nonstop; 318 minutes. Local airport times.
  • Alaska Airlines AS215: BOS 2027-06-29 09:03:00 → SEA 2027-06-29 12:27:00; nonstop; 384 minutes. Local airport times.

2027-06-19 → 2027-06-29 · $545.00

  • Delta Air Lines DL473: SEA 2027-06-19 23:07:00 → BOS 2027-06-20 07:20:00; nonstop; 313 minutes. Local airport times.
  • Delta Air Lines DL2889: BOS 2027-06-29 15:45:00 → SEA 2027-06-29 19:06:00; nonstop; 381 minutes. Local airport times.

2027-06-19 → 2027-06-29 · $502.50

  • American Airlines AA2379 / AA2089: SEA 2027-06-19 23:59:00 → BOS 2027-06-20 10:32:00; 1 stop(s) via ORD; 453 minutes. Local airport times.
    • AA2379: SEA 2027-06-19 23:59:00 → ORD 2027-06-20 05:55:00; layover at ORD: 64 minutes.
    • AA2089: ORD 2027-06-20 06:59:00 → BOS 2027-06-20 10:32:00.
  • Delta Air Lines DL2889: BOS 2027-06-29 15:45:00 → SEA 2027-06-29 19:06:00; nonstop; 381 minutes. Local airport times.

2027-06-19 → 2027-06-29 · $525.00

  • Alaska Airlines AS460: SEA 2027-06-19 15:35:00 → BOS 2027-06-19 23:59:00; nonstop; 324 minutes. Local airport times.
  • Alaska Airlines AS215: BOS 2027-06-29 09:03:00 → SEA 2027-06-29 12:27:00; nonstop; 384 minutes. Local airport times.

2027-06-19 → 2027-06-29 · $545.00

  • Delta Air Lines DL876: SEA 2027-06-19 15:55:00 → BOS 2027-06-20 00:13:00; nonstop; 318 minutes. Local airport times.
  • Delta Air Lines DL2889: BOS 2027-06-29 15:45:00 → SEA 2027-06-29 19:06:00; nonstop; 381 minutes. Local airport times.

2027-06-19 → 2027-06-29 · $502.50

  • Alaska Airlines AS2239 / AS436: SEA 2027-06-19 19:54:00 → BOS 2027-06-20 06:20:00; 1 stop(s) via PDX; 446 minutes. Local airport times.
    • AS2239: SEA 2027-06-19 19:54:00 → PDX 2027-06-19 20:50:00; layover at PDX: 69 minutes.
    • AS436: PDX 2027-06-19 21:59:00 → BOS 2027-06-20 06:20:00.
  • Alaska Airlines AS215: BOS 2027-06-29 09:03:00 → SEA 2027-06-29 12:27:00; nonstop; 384 minutes. Local airport times.

2027-06-19 → 2027-06-29 · $502.50

  • Alaska Airlines AS314 / AA4801: SEA 2027-06-19 09:16:00 → BOS 2027-06-19 19:55:00; 1 stop(s) via STL; 459 minutes. Local airport times.
    • AS314: SEA 2027-06-19 09:16:00 → STL 2027-06-19 15:06:00; layover at STL: 69 minutes.
    • AA4801: STL 2027-06-19 16:15:00 → BOS 2027-06-19 19:55:00.
  • Alaska Airlines AS215: BOS 2027-06-29 09:03:00 → SEA 2027-06-29 12:27:00; nonstop; 384 minutes. Local airport times.

2027-06-19 → 2027-06-29 · $502.50

  • American Airlines AA2203 / AA1874: SEA 2027-06-19 12:34:00 → BOS 2027-06-19 23:13:00; 1 stop(s) via PHL; 459 minutes. Local airport times.
    • AA2203: SEA 2027-06-19 12:34:00 → PHL 2027-06-19 20:35:00; layover at PHL: 75 minutes.
    • AA1874: PHL 2027-06-19 21:50:00 → BOS 2027-06-19 23:13:00.
  • Delta Air Lines DL2889: BOS 2027-06-29 15:45:00 → SEA 2027-06-29 19:06:00; nonstop; 381 minutes. Local airport times.

2027-06-19 → 2027-06-29 · $502.50

  • Alaska Airlines AS2 / AA1152: SEA 2027-06-19 14:02:00 → BOS 2027-06-20 00:21:00; 1 stop(s) via DCA; 439 minutes. Local airport times.
    • AS2: SEA 2027-06-19 14:02:00 → DCA 2027-06-19 21:59:00; layover at DCA: 60 minutes.
    • AA1152: DCA 2027-06-19 22:59:00 → BOS 2027-06-20 00:21:00.
  • Alaska Airlines AS215: BOS 2027-06-29 09:03:00 → SEA 2027-06-29 12:27:00; nonstop; 384 minutes. Local airport times.

2027-06-19 → 2027-06-29 · $517.50

  • Delta Air Lines DL1120 / DL702: SEA 2027-06-19 13:25:00 → BOS 2027-06-19 23:57:00; 1 stop(s) via SLC; 452 minutes. Local airport times.
    • DL1120: SEA 2027-06-19 13:25:00 → SLC 2027-06-19 16:26:00; layover at SLC: 70 minutes.
    • DL702: SLC 2027-06-19 17:36:00 → BOS 2027-06-19 23:57:00.
  • Delta Air Lines DL2889: BOS 2027-06-29 15:45:00 → SEA 2027-06-29 19:06:00; nonstop; 381 minutes. Local airport times.

More dates for this route