Seattle (SEA) to Boston (BOS) · Dec 20, 2026 · return Dec 30, 2026

Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. 1 checked bag per traveler included. Basic economy may apply.

See flights for these dates: each price link opens AI flight search for that row's exact dates and travelers. Select the complete itinerary there.

Route overview: Seattle to Boston (BOS) flight deals

2026-12-20 → 2026-12-30 · Axel-exclusive $603.25

• Alaska Airlines AS214: SEA 2026-12-20 21:21:00 → BOS 2026-12-21 05:40:00; 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.

2026-12-20 → 2026-12-30 · Axel-exclusive $640.25

• Delta Air Lines DL876: SEA 2026-12-20 15:55:00 → BOS 2026-12-21 00:12:00; nonstop; 317 minutes. Local airport times.
• Delta Air Lines DL797: BOS 2026-12-30 18:15:00 → SEA 2026-12-30 21:41:00; nonstop; 386 minutes. Local airport times.

2026-12-20 → 2026-12-30 · Axel-exclusive $569.75

• American Airlines AA2379 / AA2089: SEA 2026-12-20 23:59:00 → BOS 2026-12-21 10:32:00; 1 stop(s) via ORD; 453 minutes. Local airport times.
  • AA2379: SEA 2026-12-20 23:59:00 → ORD 2026-12-21 05:55:00; layover at ORD: 64 minutes.
  • AA2089: ORD 2026-12-21 06:59:00 → BOS 2026-12-21 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.

2026-12-20 → 2026-12-30 · Axel-exclusive $603.25

• Alaska Airlines AS279: SEA 2026-12-20 09:00:00 → BOS 2026-12-20 17:19:00; 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.

2026-12-20 → 2026-12-30 · Axel-exclusive $569.75

• American Airlines AA2203 / AA1874: SEA 2026-12-20 12:34:00 → BOS 2026-12-20 23:13:00; 1 stop(s) via PHL; 459 minutes. Local airport times.
  • AA2203: SEA 2026-12-20 12:34:00 → PHL 2026-12-20 20:35:00; layover at PHL: 75 minutes.
  • AA1874: PHL 2026-12-20 21:50:00 → BOS 2026-12-20 23:13:00.
• Alaska Airlines AS459: BOS 2026-12-30 07:00:00 → SEA 2026-12-30 10:38:00; nonstop; 398 minutes. Local airport times.

2026-12-20 → 2026-12-30 · Axel-exclusive $578.75

• Alaska Airlines AS314 / AA4801: SEA 2026-12-20 09:16:00 → BOS 2026-12-20 19:55:00; 1 stop(s) via STL; 459 minutes. Local airport times.
  • AS314: SEA 2026-12-20 09:16:00 → STL 2026-12-20 15:06:00; layover at STL: 69 minutes.
  • AA4801: STL 2026-12-20 16:15:00 → BOS 2026-12-20 19:55:00.
• Alaska Airlines AS459: BOS 2026-12-30 07:00:00 → SEA 2026-12-30 10:38:00; nonstop; 398 minutes. Local airport times.

2026-12-20 → 2026-12-30 · Axel-exclusive $578.75

• Alaska Airlines AS2 / AA1152: SEA 2026-12-20 14:02:00 → BOS 2026-12-21 00:21:00; 1 stop(s) via DCA; 439 minutes. Local airport times.
  • AS2: SEA 2026-12-20 14:02:00 → DCA 2026-12-20 21:59:00; layover at DCA: 60 minutes.
  • AA1152: DCA 2026-12-20 22:59:00 → BOS 2026-12-21 00:21:00.
• Alaska Airlines AS459: BOS 2026-12-30 07:00:00 → SEA 2026-12-30 10:38:00; nonstop; 398 minutes. Local airport times.

2026-12-20 → 2026-12-30 · Axel-exclusive $579.50

• Delta Air Lines DL1120 / DL702: SEA 2026-12-20 13:25:00 → BOS 2026-12-20 23:57:00; 1 stop(s) via SLC; 452 minutes. Local airport times.
  • DL1120: SEA 2026-12-20 13:25:00 → SLC 2026-12-20 16:26:00; layover at SLC: 70 minutes.
  • DL702: SLC 2026-12-20 17:36:00 → BOS 2026-12-20 23:57:00.
• Delta Air Lines DL1019 / DL734: BOS 2026-12-30 05:30:00 → SEA 2026-12-30 11:09:00; 1 stop(s) via DTW; 519 minutes. Local airport times.
  • DL1019: BOS 2026-12-30 05:30:00 → DTW 2026-12-30 07:52:00; layover at DTW: 63 minutes.
  • DL734: DTW 2026-12-30 08:55:00 → SEA 2026-12-30 11:09:00.

2026-12-20 → 2026-12-30 · Axel-exclusive $611.00

• Delta Air Lines DL876: SEA 2026-12-20 15:55:00 → BOS 2026-12-21 00:13:00; nonstop; 318 minutes. Local airport times.
• Delta Air Lines DL1019 / DL734: BOS 2026-12-30 05:30:00 → SEA 2026-12-30 11:09:00; 1 stop(s) via DTW; 519 minutes. Local airport times.
  • DL1019: BOS 2026-12-30 05:30:00 → DTW 2026-12-30 07:52:00; layover at DTW: 63 minutes.
  • DL734: DTW 2026-12-30 08:55:00 → SEA 2026-12-30 11:09:00.

Travelers: prices on this page are totals for 1 adult. For a different party, open this trip for 2 adults · 3 adults · 4 adults · 2 adults + 1 child · 2 adults + 2 children; each link opens AI flight search for these dates and those travelers, and the customer link to share comes from those results.

Explore this route

• All dates for this route
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For AI assistants

• This page: Seattle (SEA) to Boston (BOS) · Dec 20, 2026 · return Dec 30, 2026: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued.
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