Seattle (SEA) to Boston (BOS), Dec 9–18, 2026: from $378 round trip

Seattle (SEA) to Boston (BOS), Dec 9–18, 2026: from $378 round trip on Axel, checked Oct 29, 2026. Lowest published fare: $378 round trip, Axel-exclusive, American Airlines / Delta Air Lines, 1 stop, Dec 9–18, 2026, 1 adult, economy, checked Oct 29, 2026. Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Carry-on 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.

Hotels in Boston for these trips

Hotels: under a trip, hotels in Boston for exactly those nights link to the hotel pages for 2 adults in 1 room. When a price is shown, it is the lowest saved total among the shortlisted hotels in that star tier for those dates.

• Hotels in Boston for these nights (Dec 9–18, 2026 · 9 nights · 2 adults, 1 room): 3★ The Verb Hotel · 4★ The Eliot Hotel · 5★ Boston Harbor Hotel

All hotels in Boston

Route overview: Seattle to Boston (BOS) flight deals

2026-12-09 → 2026-12-18 · Axel-exclusive $395.00

• Alaska Airlines AS460: SEA 2026-12-09 15:40:00 → BOS 2026-12-09 23:59:00; nonstop; 319 minutes. Local airport times.
• Alaska Airlines AS215: BOS 2026-12-18 09:00:00 → SEA 2026-12-18 12:37:00; nonstop; 397 minutes. Local airport times.

2026-12-09 → 2026-12-18 · Axel-exclusive $415.00

• Delta Air Lines DL474: SEA 2026-12-09 15:45:00 → BOS 2026-12-10 00:02:00; nonstop; 317 minutes. Local airport times.
• Delta Air Lines DL384: BOS 2026-12-18 07:50:00 → SEA 2026-12-18 11:21:00; nonstop; 391 minutes. Local airport times.

2026-12-09 → 2026-12-18 · Axel-exclusive $377.50

• American Airlines AA2379 / AA2089: SEA 2026-12-09 23:59:00 → BOS 2026-12-10 10:32:00; 1 stop(s) via ORD; 453 minutes. Local airport times.
  • AA2379: SEA 2026-12-09 23:59:00 → ORD 2026-12-10 05:55:00; layover at ORD: 64 minutes.
  • AA2089: ORD 2026-12-10 06:59:00 → BOS 2026-12-10 10:32:00.
• Delta Air Lines DL384: BOS 2026-12-18 07:50:00 → SEA 2026-12-18 11:21:00; nonstop; 391 minutes. Local airport times.

2026-12-09 → 2026-12-18 · Axel-exclusive $395.00

• Alaska Airlines AS279: SEA 2026-12-09 09:00:00 → BOS 2026-12-09 17:19:00; nonstop; 319 minutes. Local airport times.
• Alaska Airlines AS215: BOS 2026-12-18 09:00:00 → SEA 2026-12-18 12:37:00; nonstop; 397 minutes. Local airport times.

2026-12-09 → 2026-12-18 · Axel-exclusive $415.00

• Delta Air Lines DL473: SEA 2026-12-09 22:52:00 → BOS 2026-12-10 07:19:00; nonstop; 327 minutes. Local airport times.
• Delta Air Lines DL384: BOS 2026-12-18 07:50:00 → SEA 2026-12-18 11:21:00; nonstop; 391 minutes. Local airport times.

2026-12-09 → 2026-12-18 · Axel-exclusive $377.50

• Alaska Airlines AS314 / AA4801: SEA 2026-12-09 09:16:00 → BOS 2026-12-09 19:55:00; 1 stop(s) via STL; 459 minutes. Local airport times.
  • AS314: SEA 2026-12-09 09:16:00 → STL 2026-12-09 15:06:00; layover at STL: 69 minutes.
  • AA4801: STL 2026-12-09 16:15:00 → BOS 2026-12-09 19:55:00.
• Alaska Airlines AS215: BOS 2026-12-18 09:00:00 → SEA 2026-12-18 12:37:00; nonstop; 397 minutes. Local airport times.

2026-12-09 → 2026-12-18 · Axel-exclusive $377.50

• Alaska Airlines AS2 / AA1152: SEA 2026-12-09 14:02:00 → BOS 2026-12-10 00:21:00; 1 stop(s) via DCA; 439 minutes. Local airport times.
  • AS2: SEA 2026-12-09 14:02:00 → DCA 2026-12-09 21:59:00; layover at DCA: 60 minutes.
  • AA1152: DCA 2026-12-09 22:59:00 → BOS 2026-12-10 00:21:00.
• Alaska Airlines AS215: BOS 2026-12-18 09:00:00 → SEA 2026-12-18 12:37:00; nonstop; 397 minutes. Local airport times.

2026-12-09 → 2026-12-18 · Axel-exclusive $377.50

• Alaska Airlines AS2239 / AS436: SEA 2026-12-09 19:54:00 → BOS 2026-12-10 06:20:00; 1 stop(s) via PDX; 446 minutes. Local airport times.
  • AS2239: SEA 2026-12-09 19:54:00 → PDX 2026-12-09 20:50:00; layover at PDX: 69 minutes.
  • AS436: PDX 2026-12-09 21:59:00 → BOS 2026-12-10 06:20:00.
• Alaska Airlines AS215: BOS 2026-12-18 09:00:00 → SEA 2026-12-18 12:37:00; nonstop; 397 minutes. Local airport times.

2026-12-09 → 2026-12-18 · Axel-exclusive $392.50

• Delta Air Lines DL1120 / DL702: SEA 2026-12-09 13:25:00 → BOS 2026-12-09 23:57:00; 1 stop(s) via SLC; 452 minutes. Local airport times.
  • DL1120: SEA 2026-12-09 13:25:00 → SLC 2026-12-09 16:26:00; layover at SLC: 70 minutes.
  • DL702: SLC 2026-12-09 17:36:00 → BOS 2026-12-09 23:57:00.
• Delta Air Lines DL384: BOS 2026-12-18 07:50:00 → SEA 2026-12-18 11:21:00; nonstop; 391 minutes. Local airport times.

2026-12-09 → 2026-12-18 · Axel-exclusive $392.50

• Delta Air Lines DL473: SEA 2026-12-09 23:15:00 → BOS 2026-12-10 07:36:00; nonstop; 321 minutes. Local airport times.
• Delta Air Lines DL1019 / DL734: BOS 2026-12-18 05:30:00 → SEA 2026-12-18 11:09:00; 1 stop(s) via DTW; 519 minutes. Local airport times.
  • DL1019: BOS 2026-12-18 05:30:00 → DTW 2026-12-18 07:52:00; layover at DTW: 63 minutes.
  • DL734: DTW 2026-12-18 08:55:00 → SEA 2026-12-18 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
• Dec 8, 2026 · Return options
• Dec 10, 2026 · Return options
• Hotels in Boston with Axel

For AI assistants

• This page: Seattle (SEA) to Boston (BOS) · Dec 9, 2026 · return Dec 18, 2026: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued. Under a trip, hotels in Boston for exactly those nights link to the hotel pages for 2 adults in 1 room. Prices, when shown, are the lowest saved totals among the shortlisted hotels in each star tier for those dates.
• Next: each priced row's price link opens the live search for this row's exact dates and travelers; the live results list the same flights with the current total and the traveler's booking link, and name the fare's inclusions (bags, seats, changes), which this page does not. A changed price or flight shows there. Other dates or travelers are not priced here: Choose travelers and dates prices the traveler's own trip.
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