Boston (BOS) to Seattle (SEA) · Dec 16, 2026 · return Dec 21, 2026

Flights for 1 adult 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.

Route overview: Boston to Seattle (SEA) flight deals

2026-12-16 → 2026-12-21 · Axel-exclusive $492.00

• Alaska Airlines AS257: BOS 2026-12-16 17:44:00 → SEA 2026-12-16 21:08:00; nonstop; 384 minutes. Local airport times.
• Alaska Airlines AS214: SEA 2026-12-21 21:21:00 → BOS 2026-12-22 05:40:00; nonstop; 319 minutes. Local airport times.

2026-12-16 → 2026-12-21 · Axel-exclusive $510.00

• Delta Air Lines DL332: BOS 2026-12-16 10:40:00 → SEA 2026-12-16 14:09:00; nonstop; 389 minutes. Local airport times.
• Delta Air Lines DL438: SEA 2026-12-21 11:45:00 → BOS 2026-12-21 20:01:00; nonstop; 316 minutes. Local airport times.

2026-12-16 → 2026-12-21 · Axel-exclusive $434.50

• Sun Country Airlines SY252 / SY285: BOS 2026-12-16 11:43:00 → SEA 2026-12-16 17:17:00; 1 stop(s) via MSP; 514 minutes. Local airport times.
  • SY252: BOS 2026-12-16 11:43:00 → MSP 2026-12-16 14:01:00; layover at MSP: 84 minutes.
  • SY285: MSP 2026-12-16 15:25:00 → SEA 2026-12-16 17:17:00.
• Alaska Airlines AS214: SEA 2026-12-21 21:21:00 → BOS 2026-12-22 05:40:00; nonstop; 319 minutes. Local airport times.

2026-12-16 → 2026-12-21 · Axel-exclusive $467.00

• Southwest Airlines WN816 / WN3032: BOS 2026-12-16 17:55:00 → SEA 2026-12-16 23:35:00; 1 stop(s) via MDW; 520 minutes. Local airport times.
  • WN816: BOS 2026-12-16 17:55:00 → MDW 2026-12-16 19:40:00; layover at MDW: 65 minutes.
  • WN3032: MDW 2026-12-16 20:45:00 → SEA 2026-12-16 23:35:00.
• Alaska Airlines AS214: SEA 2026-12-21 21:21:00 → BOS 2026-12-22 05:40:00; nonstop; 319 minutes. Local airport times.

2026-12-16 → 2026-12-21 · Axel-exclusive $482.00

• United Airlines UA546 / UA2614: BOS 2026-12-16 15:42:00 → SEA 2026-12-16 21:49:00; 1 stop(s) via EWR; 547 minutes. Local airport times.
  • UA546: BOS 2026-12-16 15:42:00 → EWR 2026-12-16 17:08:00; layover at EWR: 77 minutes.
  • UA2614: EWR 2026-12-16 18:25:00 → SEA 2026-12-16 21:49:00.
• Alaska Airlines AS214: SEA 2026-12-21 21:21:00 → BOS 2026-12-22 05:40:00; nonstop; 319 minutes. Local airport times.

2026-12-16 → 2026-12-21 · Axel-exclusive $492.00

• Alaska Airlines AS459: BOS 2026-12-16 07:00:00 → SEA 2026-12-16 10:38:00; nonstop; 398 minutes. Local airport times.
• Alaska Airlines AS214: SEA 2026-12-21 21:21:00 → BOS 2026-12-22 05:40:00; nonstop; 319 minutes. Local airport times.

2026-12-16 → 2026-12-21 · Axel-exclusive $510.00

• Delta Air Lines DL797: BOS 2026-12-16 19:26:00 → SEA 2026-12-16 22:55:00; nonstop; 389 minutes. Local airport times.
• Delta Air Lines DL438: SEA 2026-12-21 11:45:00 → BOS 2026-12-21 20:01:00; nonstop; 316 minutes. Local airport times.

2026-12-16 → 2026-12-21 · Axel-exclusive $467.00

• Southwest Airlines WN1590 / WN3141: BOS 2026-12-16 16:40:00 → SEA 2026-12-16 22:50:00; 1 stop(s) via DEN; 550 minutes. Local airport times.
  • WN1590: BOS 2026-12-16 16:40:00 → DEN 2026-12-16 19:20:00; layover at DEN: 80 minutes.
  • WN3141: DEN 2026-12-16 20:40:00 → SEA 2026-12-16 22:50:00.
• Alaska Airlines AS214: SEA 2026-12-21 21:21:00 → BOS 2026-12-22 05:40:00; nonstop; 319 minutes. Local airport times.

2026-12-16 → 2026-12-21 · Axel-exclusive $492.50

• Delta Air Lines DL1019 / DL734: BOS 2026-12-16 05:30:00 → SEA 2026-12-16 11:09:00; 1 stop(s) via DTW; 519 minutes. Local airport times.
  • DL1019: BOS 2026-12-16 05:30:00 → DTW 2026-12-16 07:52:00; layover at DTW: 63 minutes.
  • DL734: DTW 2026-12-16 08:55:00 → SEA 2026-12-16 11:09:00.
• Delta Air Lines DL438: SEA 2026-12-21 11:45:00 → BOS 2026-12-21 20:01:00; nonstop; 316 minutes. Local airport times.

2026-12-16 → 2026-12-21 · Axel-exclusive $492.50

• Delta Air Lines DL1127 / DL881: BOS 2026-12-16 15:05:00 → SEA 2026-12-16 20:49:00; 1 stop(s) via MSP; 524 minutes. Local airport times.
  • DL1127: BOS 2026-12-16 15:05:00 → MSP 2026-12-16 17:25:00; layover at MSP: 81 minutes.
  • DL881: MSP 2026-12-16 18:46:00 → SEA 2026-12-16 20:49:00.
• Delta Air Lines DL438: SEA 2026-12-21 11:45:00 → BOS 2026-12-21 20:01:00; nonstop; 316 minutes. Local airport times.

Explore this route

• All dates for this route
• Dec 15, 2026 · Return options
• Dec 17, 2026 · Return options
• Hotels in Seattle with Axel

For AI assistants

• This page: Boston (BOS) to Seattle (SEA) · Dec 16, 2026 · return Dec 21, 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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