Dulles (IAD) to Seattle (SEA) · Dec 25, 2026 · return Jan 3, 2027

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

2026-12-25 → 2027-01-03 · Axel-exclusive $473.40

• Alaska Airlines AS409: IAD 2026-12-25 07:00:00 → SEA 2026-12-25 10:05:00; nonstop; 365 minutes. Local airport times.
• Alaska Airlines AS737: SEA 2027-01-03 08:30:00 → IAD 2027-01-03 16:28:00; nonstop; 298 minutes. Local airport times.

2026-12-25 → 2027-01-03 · Axel-exclusive $499.70

• Delta Air Lines DL1015: IAD 2026-12-25 07:00:00 → SEA 2026-12-25 10:10:00; nonstop; 370 minutes. Local airport times.
• Delta Air Lines DL541: SEA 2027-01-03 16:30:00 → IAD 2027-01-04 00:31:00; nonstop; 301 minutes. Local airport times.

2026-12-25 → 2027-01-03 · Axel-exclusive $512.85

• United Airlines UA2731: IAD 2026-12-25 08:50:00 → SEA 2026-12-25 11:57:00; nonstop; 367 minutes. Local airport times.
• United Airlines UA672: SEA 2027-01-03 08:09:00 → IAD 2027-01-03 16:08:00; nonstop; 299 minutes. Local airport times.

2026-12-25 → 2027-01-03 · Axel-exclusive $473.40

• Alaska Airlines AS737: IAD 2026-12-25 17:31:00 → SEA 2026-12-25 20:32:00; nonstop; 361 minutes. Local airport times.
• Alaska Airlines AS737: SEA 2027-01-03 08:30:00 → IAD 2027-01-03 16:28:00; nonstop; 298 minutes. Local airport times.

2026-12-25 → 2027-01-03 · Axel-exclusive $512.85

• United Airlines UA1128: IAD 2026-12-25 17:55:00 → SEA 2026-12-25 21:02:00; nonstop; 367 minutes. Local airport times.
• United Airlines UA672: SEA 2027-01-03 08:09:00 → IAD 2027-01-03 16:08:00; nonstop; 299 minutes. Local airport times.

2026-12-25 → 2027-01-03 · Axel-exclusive $479.45

• Delta Air Lines DL432 / DL2995: IAD 2026-12-25 07:00:00 → SEA 2026-12-25 12:36:00; 1 stop(s) via SLC; 516 minutes. Local airport times.
  • DL432: IAD 2026-12-25 07:00:00 → SLC 2026-12-25 09:54:00; layover at SLC: 81 minutes.
  • DL2995: SLC 2026-12-25 11:15:00 → SEA 2026-12-25 12:36:00.
• Delta Air Lines DL541: SEA 2027-01-03 16:30:00 → IAD 2027-01-04 00:31:00; nonstop; 301 minutes. Local airport times.

2026-12-25 → 2027-01-03 · Axel-exclusive $479.45

• Delta Air Lines DL5511 / DL734: IAD 2026-12-25 06:00:00 → SEA 2026-12-25 11:09:00; 1 stop(s) via DTW; 489 minutes. Local airport times.
  • DL5511: IAD 2026-12-25 06:00:00 → DTW 2026-12-25 07:46:00; layover at DTW: 69 minutes.
  • DL734: DTW 2026-12-25 08:55:00 → SEA 2026-12-25 11:09:00.
• Delta Air Lines DL541: SEA 2027-01-03 16:30:00 → IAD 2027-01-04 00:31:00; nonstop; 301 minutes. Local airport times.

2026-12-25 → 2027-01-03 · Axel-exclusive $480.50

• Delta Air Lines DL1015: IAD 2026-12-25 07:00:00 → SEA 2026-12-25 10:05:00; nonstop; 365 minutes. Local airport times.
• Delta Air Lines DL812 / DL5413: SEA 2027-01-03 06:00:00 → IAD 2027-01-03 16:18:00; 1 stop(s) via DTW; 438 minutes. Local airport times.
  • DL812: SEA 2027-01-03 06:00:00 → DTW 2027-01-03 13:12:00; layover at DTW: 93 minutes.
  • DL5413: DTW 2027-01-03 14:45:00 → IAD 2027-01-03 16:18:00.

2026-12-25 → 2027-01-03 · Axel-exclusive $485.85

• United Airlines UA792 / UA2302: IAD 2026-12-25 08:15:00 → SEA 2026-12-25 13:35:00; 1 stop(s) via DEN; 500 minutes. Local airport times.
  • UA792: IAD 2026-12-25 08:15:00 → DEN 2026-12-25 10:27:00; layover at DEN: 63 minutes.
  • UA2302: DEN 2026-12-25 11:30:00 → SEA 2026-12-25 13:35:00.
• United Airlines UA672: SEA 2027-01-03 08:09:00 → IAD 2027-01-03 16:08:00; nonstop; 299 minutes. Local airport times.

2026-12-25 → 2027-01-03 · Axel-exclusive $485.85

• United Airlines UA565 / UA2099: IAD 2026-12-25 06:10:00 → SEA 2026-12-25 12:19:00; 1 stop(s) via ORD; 549 minutes. Local airport times.
  • UA565: IAD 2026-12-25 06:10:00 → ORD 2026-12-25 07:32:00; layover at ORD: 113 minutes.
  • UA2099: ORD 2026-12-25 09:25:00 → SEA 2026-12-25 12:19:00.
• United Airlines UA672: SEA 2027-01-03 08:09:00 → IAD 2027-01-03 16:08:00; nonstop; 299 minutes. Local airport times.

2026-12-25 → 2027-01-03 · Axel-exclusive $487.25

• United Airlines UA1128: IAD 2026-12-25 17:55:00 → SEA 2026-12-25 21:01:00; nonstop; 366 minutes. Local airport times.
• United Airlines UA2601 / UA2087: SEA 2027-01-03 05:00:00 → IAD 2027-01-03 15:44:00; 1 stop(s) via DEN; 464 minutes. Local airport times.
  • UA2601: SEA 2027-01-03 05:00:00 → DEN 2027-01-03 08:41:00; layover at DEN: 99 minutes.
  • UA2087: DEN 2027-01-03 10:20:00 → IAD 2027-01-03 15:44:00.

Travelers: prices on this page are totals for 1 adult. For a different party, open this trip for 2 adults · 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
• Dec 24, 2026 · Return options
• Dec 26, 2026 · Return options
• Hotels in Seattle with Axel

For AI assistants

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