Seattle (SEA) to Boston (BOS), Feb 21–22, 2027: from $735 round trip (2 adults, economy)

Seattle (SEA) to Boston (BOS), Feb 21–22, 2027: from $735 round trip (2 adults, economy) on Axel, checked Nov 14, 2026. Lowest published fare: $735 round trip, Axel-exclusive, American Airlines / Alaska Airlines, 1 stop, Feb 21–22, 2027, 2 adults, economy, checked Nov 14, 2026. Flights for 2 adults in economy. Prices are total for all travelers in USD, including required taxes. 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 nightly rate and the stay's total, from the lowest saved total among the shortlisted hotels in that star tier for those dates.

• Hotels in Boston for these nights (Feb 21–22, 2027 · 1 night · 2 adults, 1 room): 3★ Wyndham Boston Beacon Hill, $119 a night · 4★ Hyatt Regency Boston/Cambridge, $106 a night · 5★ InterContinental Boston by IHG, $305 a night

All hotels in Boston

Route overview: Seattle to Boston (BOS) flight deals

2027-02-21 → 2027-02-22 · Axel-exclusive $790

• Alaska Airlines AS460: SEA 2027-02-21 15:35:00 → BOS 2027-02-21 23:59:00; nonstop; 324 minutes. Local airport times.
• Alaska Airlines AS257: BOS 2027-02-22 18:22:00 → SEA 2027-02-22 22:00:00; nonstop; 398 minutes. Local airport times.

2027-02-21 → 2027-02-22 · Axel-exclusive $830

• Delta Air Lines DL876: SEA 2027-02-21 15:55:00 → BOS 2027-02-22 00:12:00; nonstop; 317 minutes. Local airport times.
• Delta Air Lines DL384: BOS 2027-02-22 07:50:00 → SEA 2027-02-22 11:21:00; nonstop; 391 minutes. Local airport times.

2027-02-21 → 2027-02-22 · Axel-exclusive $735

• American Airlines AA2379 / AA2089: SEA 2027-02-21 23:59:00 → BOS 2027-02-22 10:32:00; 1 stop(s) via ORD; 453 minutes. Local airport times.
  • AA2379: SEA 2027-02-21 23:59:00 → ORD 2027-02-22 05:55:00; layover at ORD: 64 minutes.
  • AA2089: ORD 2027-02-22 06:59:00 → BOS 2027-02-22 10:32:00.
• Alaska Airlines AS257: BOS 2027-02-22 18:22:00 → SEA 2027-02-22 22:00:00; nonstop; 398 minutes. Local airport times.

2027-02-21 → 2027-02-22 · Axel-exclusive $790

• Alaska Airlines AS460: SEA 2027-02-21 21:20:00 → BOS 2027-02-22 05:40:00; nonstop; 320 minutes. Local airport times.
• Alaska Airlines AS215: BOS 2027-02-22 09:00:00 → SEA 2027-02-22 12:37:00; nonstop; 397 minutes. Local airport times.

2027-02-21 → 2027-02-22 · Axel-exclusive $830

• Delta Air Lines DL459: SEA 2027-02-21 07:15:00 → BOS 2027-02-21 15:43:00; nonstop; 328 minutes. Local airport times.
• Delta Air Lines DL384: BOS 2027-02-22 07:50:00 → SEA 2027-02-22 11:21:00; nonstop; 391 minutes. Local airport times.

2027-02-21 → 2027-02-22 · Axel-exclusive $755

• Alaska Airlines AS314 / AA4801: SEA 2027-02-21 09:16:00 → BOS 2027-02-21 19:55:00; 1 stop(s) via STL; 459 minutes. Local airport times.
  • AS314: SEA 2027-02-21 09:16:00 → STL 2027-02-21 15:06:00; layover at STL: 69 minutes.
  • AA4801: STL 2027-02-21 16:15:00 → BOS 2027-02-21 19:55:00.
• Alaska Airlines AS215: BOS 2027-02-22 09:00:00 → SEA 2027-02-22 12:37:00; nonstop; 397 minutes. Local airport times.

2027-02-21 → 2027-02-22 · Axel-exclusive $755

• Alaska Airlines AS2 / AA1152: SEA 2027-02-21 14:02:00 → BOS 2027-02-22 00:21:00; 1 stop(s) via DCA; 439 minutes. Local airport times.
  • AS2: SEA 2027-02-21 14:02:00 → DCA 2027-02-21 21:59:00; layover at DCA: 60 minutes.
  • AA1152: DCA 2027-02-21 22:59:00 → BOS 2027-02-22 00:21:00.
• Alaska Airlines AS215: BOS 2027-02-22 09:00:00 → SEA 2027-02-22 12:37:00; nonstop; 397 minutes. Local airport times.

2027-02-21 → 2027-02-22 · Axel-exclusive $755

• American Airlines AA2203 / AA1874: SEA 2027-02-21 12:34:00 → BOS 2027-02-21 23:13:00; 1 stop(s) via PHL; 459 minutes. Local airport times.
  • AA2203: SEA 2027-02-21 12:34:00 → PHL 2027-02-21 20:35:00; layover at PHL: 75 minutes.
  • AA1874: PHL 2027-02-21 21:50:00 → BOS 2027-02-21 23:13:00.
• Delta Air Lines DL384: BOS 2027-02-22 07:50:00 → SEA 2027-02-22 11:21:00; nonstop; 391 minutes. Local airport times.

2027-02-21 → 2027-02-22 · Axel-exclusive $785

• Delta Air Lines DL1120 / DL702: SEA 2027-02-21 13:25:00 → BOS 2027-02-21 23:57:00; 1 stop(s) via SLC; 452 minutes. Local airport times.
  • DL1120: SEA 2027-02-21 13:25:00 → SLC 2027-02-21 16:26:00; layover at SLC: 70 minutes.
  • DL702: SLC 2027-02-21 17:36:00 → BOS 2027-02-21 23:57:00.
• Delta Air Lines DL384: BOS 2027-02-22 07:50:00 → SEA 2027-02-22 11:21:00; nonstop; 391 minutes. Local airport times.

2027-02-21 → 2027-02-22 · Axel-exclusive $785

• Delta Air Lines DL876: SEA 2027-02-21 15:55:00 → BOS 2027-02-22 00:13:00; nonstop; 318 minutes. Local airport times.
• Delta Air Lines DL1127 / DL881: BOS 2027-02-22 15:05:00 → SEA 2027-02-22 20:49:00; 1 stop(s) via MSP; 524 minutes. Local airport times.
  • DL1127: BOS 2027-02-22 15:05:00 → MSP 2027-02-22 17:25:00; layover at MSP: 81 minutes.
  • DL881: MSP 2027-02-22 18:46:00 → SEA 2027-02-22 20:49:00.

Travelers: prices on this page are totals for 2 adults. For a different party, open this trip for 1 adult · 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
• Feb 20, 2027 · Return options
• Feb 22, 2027 · Return options
• Hotels in Boston with Axel

For AI assistants

• This page: Seattle (SEA) to Boston (BOS) · Feb 21, 2027 · return Feb 22, 2027: 2 adults in economy, every priced fare with its flights, times and total, each with its displayed check date. 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 nightly rate and the stay's total, from the lowest saved total 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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