Dulles (IAD) to Seattle (SEA) · Dec 8, 2026 · return Dec 14, 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: Washington, DC to Seattle (SEA) flight deals

2026-12-08 → 2026-12-14 · Axel-exclusive $360.00

• Alaska Airlines AS737: IAD 2026-12-08 17:31:00 → SEA 2026-12-08 20:32:00; nonstop; 361 minutes. Local airport times.
• Alaska Airlines AS367: SEA 2026-12-14 21:40:00 → IAD 2026-12-15 05:35:00; nonstop; 295 minutes. Local airport times.

2026-12-08 → 2026-12-14 · Axel-exclusive $380.00

• Delta Air Lines DL1015: IAD 2026-12-08 07:00:00 → SEA 2026-12-08 10:10:00; nonstop; 370 minutes. Local airport times.
• Delta Air Lines DL541: SEA 2026-12-14 16:30:00 → IAD 2026-12-15 00:31:00; nonstop; 301 minutes. Local airport times.

2026-12-08 → 2026-12-14 · Axel-exclusive $390.00

• United Airlines UA2731: IAD 2026-12-08 08:50:00 → SEA 2026-12-08 11:57:00; nonstop; 367 minutes. Local airport times.
• United Airlines UA2645: SEA 2026-12-14 22:50:00 → IAD 2026-12-15 06:51:00; nonstop; 301 minutes. Local airport times.

2026-12-08 → 2026-12-14 · Axel-exclusive $310.00

• Sun Country Airlines SY668 / SY285: IAD 2026-12-08 12:44:00 → SEA 2026-12-08 17:17:00; 1 stop(s) via MSP; 453 minutes. Local airport times.
  • SY668: IAD 2026-12-08 12:44:00 → MSP 2026-12-08 14:21:00; layover at MSP: 64 minutes.
  • SY285: MSP 2026-12-08 15:25:00 → SEA 2026-12-08 17:17:00.
• Alaska Airlines AS367: SEA 2026-12-14 21:40:00 → IAD 2026-12-15 05:35:00; nonstop; 295 minutes. Local airport times.

2026-12-08 → 2026-12-14 · Axel-exclusive $360.00

• Alaska Airlines AS409: IAD 2026-12-08 07:00:00 → SEA 2026-12-08 10:05:00; nonstop; 365 minutes. Local airport times.
• Alaska Airlines AS367: SEA 2026-12-14 21:40:00 → IAD 2026-12-15 05:35:00; nonstop; 295 minutes. Local airport times.

2026-12-08 → 2026-12-14 · Axel-exclusive $390.00

• United Airlines UA1128: IAD 2026-12-08 17:55:00 → SEA 2026-12-08 21:01:00; nonstop; 366 minutes. Local airport times.
• United Airlines UA2645: SEA 2026-12-14 22:50:00 → IAD 2026-12-15 06:51:00; nonstop; 301 minutes. Local airport times.

2026-12-08 → 2026-12-14 · Axel-exclusive $345.00

• Alaska Airlines AS409: IAD 2026-12-08 07:05:00 → SEA 2026-12-08 10:00:00; nonstop; 355 minutes. Local airport times.
• Alaska Airlines AS424 / AA3320: SEA 2026-12-14 00:30:00 → IAD 2026-12-14 11:23:00; 1 stop(s) via DFW; 473 minutes. Local airport times.
  • AS424: SEA 2026-12-14 00:30:00 → DFW 2026-12-14 06:20:00; layover at DFW: 70 minutes.
  • AA3320: DFW 2026-12-14 07:30:00 → IAD 2026-12-14 11:23:00.

2026-12-08 → 2026-12-14 · Axel-exclusive $365.00

• Delta Air Lines DL1015: IAD 2026-12-08 07:00:00 → SEA 2026-12-08 10:05:00; nonstop; 365 minutes. Local airport times.
• Delta Air Lines DL812 / DL5413: SEA 2026-12-14 06:00:00 → IAD 2026-12-14 16:18:00; 1 stop(s) via DTW; 438 minutes. Local airport times.
  • DL812: SEA 2026-12-14 06:00:00 → DTW 2026-12-14 13:12:00; layover at DTW: 93 minutes.
  • DL5413: DTW 2026-12-14 14:45:00 → IAD 2026-12-14 16:18:00.

2026-12-08 → 2026-12-14 · Axel-exclusive $365.00

• Delta Air Lines DL432 / DL2995: IAD 2026-12-08 07:00:00 → SEA 2026-12-08 12:36:00; 1 stop(s) via SLC; 516 minutes. Local airport times.
  • DL432: IAD 2026-12-08 07:00:00 → SLC 2026-12-08 09:54:00; layover at SLC: 81 minutes.
  • DL2995: SLC 2026-12-08 11:15:00 → SEA 2026-12-08 12:36:00.
• Delta Air Lines DL541: SEA 2026-12-14 16:30:00 → IAD 2026-12-15 00:31:00; nonstop; 301 minutes. Local airport times.

2026-12-08 → 2026-12-14 · Axel-exclusive $370.00

• United Airlines UA1128: IAD 2026-12-08 17:55:00 → SEA 2026-12-08 21:02:00; nonstop; 367 minutes. Local airport times.
• United Airlines UA2601 / UA2087: SEA 2026-12-14 05:00:00 → IAD 2026-12-14 15:44:00; 1 stop(s) via DEN; 464 minutes. Local airport times.
  • UA2601: SEA 2026-12-14 05:00:00 → DEN 2026-12-14 08:41:00; layover at DEN: 99 minutes.
  • UA2087: DEN 2026-12-14 10:20:00 → IAD 2026-12-14 15:44:00.

2026-12-08 → 2026-12-14 · Axel-exclusive $370.00

• United Airlines UA792 / UA2302: IAD 2026-12-08 08:15:00 → SEA 2026-12-08 13:35:00; 1 stop(s) via DEN; 500 minutes. Local airport times.
  • UA792: IAD 2026-12-08 08:15:00 → DEN 2026-12-08 10:27:00; layover at DEN: 63 minutes.
  • UA2302: DEN 2026-12-08 11:30:00 → SEA 2026-12-08 13:35:00.
• United Airlines UA2645: SEA 2026-12-14 22:50:00 → IAD 2026-12-15 06:51:00; nonstop; 301 minutes. Local airport times.

Explore this route

• All dates for this route
• Dec 7, 2026 · Return options
• Dec 9, 2026 · Return options
• Hotels in Seattle with Axel

For AI assistants

• This page: Dulles (IAD) to Seattle (SEA) · Dec 8, 2026 · return Dec 14, 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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