Seattle (SEA) to Dulles (IAD) · Dec 12, 2026 · return Dec 17, 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

2026-12-12 → 2026-12-17 · Axel-exclusive $430.00

• Alaska Airlines AS367: SEA 2026-12-12 21:45:00 → IAD 2026-12-13 05:45:00; nonstop; 300 minutes. Local airport times.
• Alaska Airlines AS409: IAD 2026-12-17 07:05:00 → SEA 2026-12-17 10:00:00; nonstop; 355 minutes. Local airport times.

2026-12-12 → 2026-12-17 · Axel-exclusive $450.00

• Delta Air Lines DL541: SEA 2026-12-12 16:30:00 → IAD 2026-12-13 00:31:00; nonstop; 301 minutes. Local airport times.
• Delta Air Lines DL1015: IAD 2026-12-17 07:00:00 → SEA 2026-12-17 10:10:00; nonstop; 370 minutes. Local airport times.

2026-12-12 → 2026-12-17 · Axel-exclusive $410.00

• United Airlines UA2601 / UA2087: SEA 2026-12-12 05:00:00 → IAD 2026-12-12 15:44:00; 1 stop(s) via DEN; 464 minutes. Local airport times.
  • UA2601: SEA 2026-12-12 05:00:00 → DEN 2026-12-12 08:41:00; layover at DEN: 99 minutes.
  • UA2087: DEN 2026-12-12 10:20:00 → IAD 2026-12-12 15:44:00.
• United Airlines UA792 / UA2302: IAD 2026-12-17 08:15:00 → SEA 2026-12-17 13:35:00; 1 stop(s) via DEN; 500 minutes. Local airport times.
  • UA792: IAD 2026-12-17 08:15:00 → DEN 2026-12-17 10:27:00; layover at DEN: 63 minutes.
  • UA2302: DEN 2026-12-17 11:30:00 → SEA 2026-12-17 13:35:00.

2026-12-12 → 2026-12-17 · Axel-exclusive $430.00

• Alaska Airlines AS737: SEA 2026-12-12 08:30:00 → IAD 2026-12-12 16:28:00; nonstop; 298 minutes. Local airport times.
• Alaska Airlines AS409: IAD 2026-12-17 07:05:00 → SEA 2026-12-17 10:00:00; nonstop; 355 minutes. Local airport times.

2026-12-12 → 2026-12-17 · Axel-exclusive $415.00

• Alaska Airlines AS424 / AA3320: SEA 2026-12-12 00:30:00 → IAD 2026-12-12 11:23:00; 1 stop(s) via DFW; 473 minutes. Local airport times.
  • AS424: SEA 2026-12-12 00:30:00 → DFW 2026-12-12 06:20:00; layover at DFW: 70 minutes.
  • AA3320: DFW 2026-12-12 07:30:00 → IAD 2026-12-12 11:23:00.
• Alaska Airlines AS409: IAD 2026-12-17 07:05:00 → SEA 2026-12-17 10:00:00; nonstop; 355 minutes. Local airport times.

2026-12-12 → 2026-12-17 · Axel-exclusive $425.00

• United Airlines UA1348: SEA 2026-12-12 08:09:00 → IAD 2026-12-12 16:08:00; nonstop; 299 minutes. Local airport times.
• United Airlines UA792 / UA2302: IAD 2026-12-17 08:15:00 → SEA 2026-12-17 13:35:00; 1 stop(s) via DEN; 500 minutes. Local airport times.
  • UA792: IAD 2026-12-17 08:15:00 → DEN 2026-12-17 10:27:00; layover at DEN: 63 minutes.
  • UA2302: DEN 2026-12-17 11:30:00 → SEA 2026-12-17 13:35:00.

2026-12-12 → 2026-12-17 · Axel-exclusive $435.00

• Delta Air Lines DL1120 / DL847: SEA 2026-12-12 13:25:00 → IAD 2026-12-12 23:47:00; 1 stop(s) via SLC; 442 minutes. Local airport times.
  • DL1120: SEA 2026-12-12 13:25:00 → SLC 2026-12-12 16:26:00; layover at SLC: 85 minutes.
  • DL847: SLC 2026-12-12 17:51:00 → IAD 2026-12-12 23:47:00.
• Delta Air Lines DL1015: IAD 2026-12-17 07:00:00 → SEA 2026-12-17 10:10:00; nonstop; 370 minutes. Local airport times.

2026-12-12 → 2026-12-17 · Axel-exclusive $435.00

• Delta Air Lines DL567 / DL1324: SEA 2026-12-12 22:40:00 → IAD 2026-12-13 09:09:00; 1 stop(s) via ATL; 449 minutes. Local airport times.
  • DL567: SEA 2026-12-12 22:40:00 → ATL 2026-12-13 06:12:00; layover at ATL: 73 minutes.
  • DL1324: ATL 2026-12-13 07:25:00 → IAD 2026-12-13 09:09:00.
• Delta Air Lines DL1015: IAD 2026-12-17 07:00:00 → SEA 2026-12-17 10:10:00; nonstop; 370 minutes. Local airport times.

2026-12-12 → 2026-12-17 · Axel-exclusive $435.00

• Delta Air Lines DL541: SEA 2026-12-12 16:30:00 → IAD 2026-12-13 00:20:00; nonstop; 290 minutes. Local airport times.
• Delta Air Lines DL5511 / DL734: IAD 2026-12-17 06:00:00 → SEA 2026-12-17 11:09:00; 1 stop(s) via DTW; 489 minutes. Local airport times.
  • DL5511: IAD 2026-12-17 06:00:00 → DTW 2026-12-17 07:46:00; layover at DTW: 69 minutes.
  • DL734: DTW 2026-12-17 08:55:00 → SEA 2026-12-17 11:09:00.

Explore this route

• All dates for this route
• Dec 11, 2026 · Return options
• Dec 13, 2026 · Return options
• Hotels in Washington, DC with Axel

For AI assistants

• This page: Seattle (SEA) to Dulles (IAD) · Dec 12, 2026 · return Dec 17, 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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