Seattle (SEA) to Dulles (IAD) · Dec 27, 2026 · return Dec 31, 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: Seattle to Dulles (IAD) flight deals

2026-12-27 → 2026-12-31 · Axel-exclusive $537.50

• Alaska Airlines AS367: SEA 2026-12-27 21:40:00 → IAD 2026-12-28 05:35:00; nonstop; 295 minutes. Local airport times.
• Alaska Airlines AS409: IAD 2026-12-31 07:05:00 → SEA 2026-12-31 10:00:00; nonstop; 355 minutes. Local airport times.

2026-12-27 → 2026-12-31 · Axel-exclusive $562.50

• Delta Air Lines DL541: SEA 2026-12-27 16:30:00 → IAD 2026-12-28 00:31:00; nonstop; 301 minutes. Local airport times.
• Delta Air Lines DL1015: IAD 2026-12-31 07:00:00 → SEA 2026-12-31 10:10:00; nonstop; 370 minutes. Local airport times.

2026-12-27 → 2026-12-31 · Axel-exclusive $512.50

• United Airlines UA2601 / UA2087: SEA 2026-12-27 05:00:00 → IAD 2026-12-27 15:44:00; 1 stop(s) via DEN; 464 minutes. Local airport times.
  • UA2601: SEA 2026-12-27 05:00:00 → DEN 2026-12-27 08:41:00; layover at DEN: 99 minutes.
  • UA2087: DEN 2026-12-27 10:20:00 → IAD 2026-12-27 15:44:00.
• United Airlines UA565 / UA2099: IAD 2026-12-31 06:10:00 → SEA 2026-12-31 12:19:00; 1 stop(s) via ORD; 549 minutes. Local airport times.
  • UA565: IAD 2026-12-31 06:10:00 → ORD 2026-12-31 07:32:00; layover at ORD: 113 minutes.
  • UA2099: ORD 2026-12-31 09:25:00 → SEA 2026-12-31 12:19:00.

2026-12-27 → 2026-12-31 · Axel-exclusive $537.50

• Alaska Airlines AS737: SEA 2026-12-27 08:30:00 → IAD 2026-12-27 16:28:00; nonstop; 298 minutes. Local airport times.
• Alaska Airlines AS409: IAD 2026-12-31 07:05:00 → SEA 2026-12-31 10:00:00; nonstop; 355 minutes. Local airport times.

2026-12-27 → 2026-12-31 · Axel-exclusive $518.75

• Alaska Airlines AS424 / AA3320: SEA 2026-12-27 00:30:00 → IAD 2026-12-27 11:23:00; 1 stop(s) via DFW; 473 minutes. Local airport times.
  • AS424: SEA 2026-12-27 00:30:00 → DFW 2026-12-27 06:20:00; layover at DFW: 70 minutes.
  • AA3320: DFW 2026-12-27 07:30:00 → IAD 2026-12-27 11:23:00.
• Alaska Airlines AS409: IAD 2026-12-31 07:05:00 → SEA 2026-12-31 10:00:00; nonstop; 355 minutes. Local airport times.

2026-12-27 → 2026-12-31 · Axel-exclusive $531.25

• United Airlines UA672: SEA 2026-12-27 08:09:00 → IAD 2026-12-27 16:08:00; nonstop; 299 minutes. Local airport times.
• United Airlines UA565 / UA2099: IAD 2026-12-31 06:10:00 → SEA 2026-12-31 12:19:00; 1 stop(s) via ORD; 549 minutes. Local airport times.
  • UA565: IAD 2026-12-31 06:10:00 → ORD 2026-12-31 07:32:00; layover at ORD: 113 minutes.
  • UA2099: ORD 2026-12-31 09:25:00 → SEA 2026-12-31 12:19:00.

2026-12-27 → 2026-12-31 · Axel-exclusive $543.75

• Delta Air Lines DL812 / DL5413: SEA 2026-12-27 06:00:00 → IAD 2026-12-27 16:18:00; 1 stop(s) via DTW; 438 minutes. Local airport times.
  • DL812: SEA 2026-12-27 06:00:00 → DTW 2026-12-27 13:12:00; layover at DTW: 93 minutes.
  • DL5413: DTW 2026-12-27 14:45:00 → IAD 2026-12-27 16:18:00.
• Delta Air Lines DL1015: IAD 2026-12-31 07:00:00 → SEA 2026-12-31 10:10:00; nonstop; 370 minutes. Local airport times.

2026-12-27 → 2026-12-31 · Axel-exclusive $543.75

• Delta Air Lines DL567 / DL1324: SEA 2026-12-27 22:40:00 → IAD 2026-12-28 09:09:00; 1 stop(s) via ATL; 449 minutes. Local airport times.
  • DL567: SEA 2026-12-27 22:40:00 → ATL 2026-12-28 06:12:00; layover at ATL: 73 minutes.
  • DL1324: ATL 2026-12-28 07:25:00 → IAD 2026-12-28 09:09:00.
• Delta Air Lines DL1015: IAD 2026-12-31 07:00:00 → SEA 2026-12-31 10:10:00; nonstop; 370 minutes. Local airport times.

2026-12-27 → 2026-12-31 · Axel-exclusive $543.75

• Delta Air Lines DL541: SEA 2026-12-27 16:30:00 → IAD 2026-12-28 00:20:00; nonstop; 290 minutes. Local airport times.
• Delta Air Lines DL5511 / DL734: IAD 2026-12-31 06:00:00 → SEA 2026-12-31 11:09:00; 1 stop(s) via DTW; 489 minutes. Local airport times.
  • DL5511: IAD 2026-12-31 06:00:00 → DTW 2026-12-31 07:46:00; layover at DTW: 69 minutes.
  • DL734: DTW 2026-12-31 08:55:00 → SEA 2026-12-31 11:09:00.

Explore this route

• All dates for this route
• Dec 26, 2026 · Return options
• Dec 28, 2026 · Return options
• Hotels in Washington, DC with Axel

For AI assistants

• This page: Seattle (SEA) to Dulles (IAD) · Dec 27, 2026 · return Dec 31, 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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