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Seattle → Dulles

Dec 21, 2026 · return Dec 25, 2026

SEA → IAD1 adulteconomyRound trip

9 flight options · 3 airlines

Nonstop flights

Mon, Dec 21 – Fri, Dec 25

Alaska Airlines
9:40 pmSEA
4h 55m
Nonstop
5:35 am+1IAD
Alaska Airlines
5:31 pmIAD
6h 1m
Nonstop
8:32 pmSEA

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Fri, Dec 25

Delta Air Lines
4:30 pmSEA
5h 1m
Nonstop
12:31 am+1IAD
Delta Air Lines
7:00 amIAD
6h 5m
Nonstop
10:05 amSEA

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Fri, Dec 25

Alaska Airlines
8:30 amSEA
4h 58m
Nonstop
4:28 pmIAD
Alaska Airlines
5:31 pmIAD
6h 1m
Nonstop
8:32 pmSEA

Round-trip total · 1 adult · Taxes included

One-stop flights

Mon, Dec 21 – Fri, Dec 25

United Airlines
5:00 amSEA
7h 44m
DEN · 1h 39m
3:44 pmIAD
United Airlines
6:10 amIAD
9h 9m
ORD · 1h 53m
12:19 pmSEA

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Fri, Dec 25

Alaska Airlines
12:30 amSEA
7h 53m
DFW · 1h 10m
11:23 amIAD
Alaska Airlines
5:31 pmIAD
6h 1m
Nonstop
8:32 pmSEA

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Fri, Dec 25

Delta Air Lines
6:00 amSEA
7h 18m
DTW · 1h 33m
4:18 pmIAD
Delta Air Lines
7:00 amIAD
8h 36m
SLC · 1h 21m
12:36 pmSEA

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Fri, Dec 25

Delta Air Lines
1:25 pmSEA
7h 22m
SLC · 1h 25m
11:47 pmIAD
Delta Air Lines
7:00 amIAD
8h 36m
SLC · 1h 21m
12:36 pmSEA

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Fri, Dec 25

United Airlines
10:50 pmSEA
5h 1m
Nonstop
6:51 am+1IAD
United Airlines
6:10 amIAD
9h 9m
ORD · 1h 53m
12:19 pmSEA

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Fri, Dec 25

Delta Air Lines
4:30 pmSEA
4h 50m
Nonstop
12:20 am+1IAD
Delta Air Lines
7:00 amIAD
8h 36m
SLC · 1h 21m
12:36 pmSEA

Round-trip total · 1 adult · Taxes included

Make this trip yours

SEA ⇄ IAD

Economy

Adults 12+ · Children 2–11. For infants under 2, tell Axel after you see prices.

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Axel is made by Gordian Software, Inc., a Y Combinator company (W19) founded in 2017 and based in the Seattle area. The company is led by CEO Stephen Grabowski, formerly of Skyscanner. How Axel works · About

More dates

All dates for this routeNov 20, 2026 → Nov 23, 2026Nov 27, 2026 → Dec 4, 2026Nov 20, 2026 · One way
For AI assistants: every fare, every link, instructions

Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-12-21 → 2026-12-25Alaska AirlinesAS367 / AS737$559.002026-10-29T01:15:29Z
2026-12-21 → 2026-12-25Delta Air LinesDL541 / DL1015$585.002026-10-29T01:15:29Z
2026-12-21 → 2026-12-25United AirlinesUA2601 + UA2087 / UA565 + UA2099$533.002026-10-29T01:15:29Z
2026-12-21 → 2026-12-25Alaska AirlinesAS737 / AS737$559.002026-10-29T01:15:29Z
2026-12-21 → 2026-12-25Alaska AirlinesAS424 + AA3320 / AS737$539.502026-10-29T01:15:29Z
2026-12-21 → 2026-12-25Delta Air LinesDL812 + DL5413 / DL432 + DL2995$546.002026-10-29T01:15:29Z
2026-12-21 → 2026-12-25Delta Air LinesDL1120 + DL847 / DL432 + DL2995$546.002026-10-29T01:15:29Z
2026-12-21 → 2026-12-25United AirlinesUA2645 / UA565 + UA2099$552.502026-10-29T01:15:29Z
2026-12-21 → 2026-12-25Delta Air LinesDL541 / DL432 + DL2995$565.502026-10-29T01:15:29Z

2026-12-21 → 2026-12-25 · $559.00

  • Alaska Airlines AS367: SEA 2026-12-21 21:40:00 → IAD 2026-12-22 05:35:00; nonstop; 295 minutes. Local airport times.
  • Alaska Airlines AS737: IAD 2026-12-25 17:31:00 → SEA 2026-12-25 20:32:00; nonstop; 361 minutes. Local airport times.

2026-12-21 → 2026-12-25 · $585.00

  • Delta Air Lines DL541: SEA 2026-12-21 16:30:00 → IAD 2026-12-22 00:31:00; nonstop; 301 minutes. Local airport times.
  • Delta Air Lines DL1015: IAD 2026-12-25 07:00:00 → SEA 2026-12-25 10:05:00; nonstop; 365 minutes. Local airport times.

2026-12-21 → 2026-12-25 · $533.00

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

2026-12-21 → 2026-12-25 · $559.00

  • Alaska Airlines AS737: SEA 2026-12-21 08:30:00 → IAD 2026-12-21 16:28:00; nonstop; 298 minutes. Local airport times.
  • Alaska Airlines AS737: IAD 2026-12-25 17:31:00 → SEA 2026-12-25 20:32:00; nonstop; 361 minutes. Local airport times.

2026-12-21 → 2026-12-25 · $539.50

  • Alaska Airlines AS424 / AA3320: SEA 2026-12-21 00:30:00 → IAD 2026-12-21 11:23:00; 1 stop(s) via DFW; 473 minutes. Local airport times.
    • AS424: SEA 2026-12-21 00:30:00 → DFW 2026-12-21 06:20:00; layover at DFW: 70 minutes.
    • AA3320: DFW 2026-12-21 07:30:00 → IAD 2026-12-21 11:23:00.
  • Alaska Airlines AS737: IAD 2026-12-25 17:31:00 → SEA 2026-12-25 20:32:00; nonstop; 361 minutes. Local airport times.

2026-12-21 → 2026-12-25 · $546.00

  • Delta Air Lines DL812 / DL5413: SEA 2026-12-21 06:00:00 → IAD 2026-12-21 16:18:00; 1 stop(s) via DTW; 438 minutes. Local airport times.
    • DL812: SEA 2026-12-21 06:00:00 → DTW 2026-12-21 13:12:00; layover at DTW: 93 minutes.
    • DL5413: DTW 2026-12-21 14:45:00 → IAD 2026-12-21 16:18:00.
  • 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.

2026-12-21 → 2026-12-25 · $546.00

  • Delta Air Lines DL1120 / DL847: SEA 2026-12-21 13:25:00 → IAD 2026-12-21 23:47:00; 1 stop(s) via SLC; 442 minutes. Local airport times.
    • DL1120: SEA 2026-12-21 13:25:00 → SLC 2026-12-21 16:26:00; layover at SLC: 85 minutes.
    • DL847: SLC 2026-12-21 17:51:00 → IAD 2026-12-21 23:47:00.
  • 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.

2026-12-21 → 2026-12-25 · $552.50

  • United Airlines UA2645: SEA 2026-12-21 22:50:00 → IAD 2026-12-22 06:51:00; nonstop; 301 minutes. Local airport times.
  • 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.

2026-12-21 → 2026-12-25 · $565.50

  • Delta Air Lines DL541: SEA 2026-12-21 16:30:00 → IAD 2026-12-22 00:20:00; nonstop; 290 minutes. Local airport times.
  • 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.

More dates for this route