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Route overview: Seattle to Dulles (IAD) flight deals

Seattle → Dulles

Dec 13, 2026 · return Dec 20, 2026

SEA → IAD1 adulteconomyRound trip

11 flight options · 3 airlines

Nonstop flights

Sun, Dec 13 – Sun, Dec 20

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

Sun, Dec 13 – Sun, Dec 20

United Airlines
10:50 pmSEA
5h 1m
Nonstop
6:51 am+1IAD
United Airlines
5:55 pmIAD
6h 6m
Nonstop
9:01 pmSEA

Round-trip total · 1 adult · Taxes included

Sun, Dec 13 – Sun, Dec 20

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

Sun, Dec 13 – Sun, Dec 20

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

Sun, Dec 13 – Sun, Dec 20

United Airlines
8:09 amSEA
4h 59m
Nonstop
4:08 pmIAD
United Airlines
5:55 pmIAD
6h 6m
Nonstop
9:01 pmSEA

Round-trip total · 1 adult · Taxes included

One-stop flights

Sun, Dec 13 – Sun, Dec 20

Delta Air Lines
6:00 amSEA
7h 18m
DTW · 1h 33m
4:18 pmIAD
Delta Air Lines
6:00 amIAD
8h 9m
DTW · 1h 9m
11:09 amSEA

Round-trip total · 1 adult · Taxes included

Sun, Dec 13 – Sun, Dec 20

Delta Air Lines
1:25 pmSEA
7h 22m
SLC · 1h 25m
11:47 pmIAD
Delta Air Lines
6:00 amIAD
8h 9m
DTW · 1h 9m
11:09 amSEA

Round-trip total · 1 adult · Taxes included

Sun, Dec 13 – Sun, Dec 20

Delta Air Lines
10:40 pmSEA
7h 29m
ATL · 1h 13m
9:09 am+1IAD
Delta Air Lines
6:00 amIAD
8h 9m
DTW · 1h 9m
11:09 amSEA

Round-trip total · 1 adult · Taxes included

Sun, Dec 13 – Sun, Dec 20

United Airlines
10:50 amSEA
7h 23m
ORD · 1h 10m
9:13 pmIAD
United Airlines
5:55 pmIAD
6h 6m
Nonstop
9:01 pmSEA

Round-trip total · 1 adult · Taxes included

Sun, Dec 13 – Sun, Dec 20

United Airlines
5:00 amSEA
7h 44m
DEN · 1h 39m
3:44 pmIAD
United Airlines
5:55 pmIAD
6h 6m
Nonstop
9:01 pmSEA

Round-trip total · 1 adult · Taxes included

Sun, Dec 13 – Sun, Dec 20

Delta Air Lines
4:30 pmSEA
4h 50m
Nonstop
12:20 am+1IAD
Delta Air Lines
6:00 amIAD
8h 9m
DTW · 1h 9m
11:09 amSEA

Round-trip total · 1 adult · Taxes included

Make this trip yours

SEA ⇄ IAD

Economy

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Explore this route

All dates for this routeDec 12, 2026 → Dec 19, 2026Dec 14, 2026 → Dec 21, 2026Hotels in Washington, DC with Axel
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.

Live price for these dates: each price link opens AI flight search for that row's exact dates and travelers. Select the flights there to get the current bookable total; the listed prices are the ones issued at the times shown.

Route overview: Seattle to Dulles (IAD) flight deals

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-12-13 → 2026-12-20Alaska AirlinesAS737 / AS737$494.502026-10-29T01:15:29Z
2026-12-13 → 2026-12-20United AirlinesUA2645 / UA1128$506.002026-10-29T01:15:29Z
2026-12-13 → 2026-12-20Delta Air LinesDL541 / DL1015$517.502026-10-29T01:15:29Z
2026-12-13 → 2026-12-20Alaska AirlinesAS367 / AS737$494.502026-10-29T01:15:29Z
2026-12-13 → 2026-12-20United AirlinesUA672 / UA1128$506.002026-10-29T01:15:29Z
2026-12-13 → 2026-12-20Delta Air LinesDL812 + DL5413 / DL5511 + DL734$483.002026-10-29T01:15:29Z
2026-12-13 → 2026-12-20Delta Air LinesDL1120 + DL847 / DL5511 + DL734$483.002026-10-29T01:15:29Z
2026-12-13 → 2026-12-20Delta Air LinesDL567 + DL1324 / DL5511 + DL734$483.002026-10-29T01:15:29Z
2026-12-13 → 2026-12-20United AirlinesUA747 + UA2202 / UA1128$491.002026-10-29T01:15:29Z
2026-12-13 → 2026-12-20United AirlinesUA2601 + UA2087 / UA1128$491.002026-10-29T01:15:29Z
2026-12-13 → 2026-12-20Delta Air LinesDL541 / DL5511 + DL734$498.002026-10-29T01:15:29Z

2026-12-13 → 2026-12-20 · $494.50

  • Alaska Airlines AS737: SEA 2026-12-13 08:30:00 → IAD 2026-12-13 16:28:00; nonstop; 298 minutes. Local airport times.
  • Alaska Airlines AS737: IAD 2026-12-20 17:31:00 → SEA 2026-12-20 20:32:00; nonstop; 361 minutes. Local airport times.

2026-12-13 → 2026-12-20 · $506.00

  • United Airlines UA2645: SEA 2026-12-13 22:50:00 → IAD 2026-12-14 06:51:00; nonstop; 301 minutes. Local airport times.
  • United Airlines UA1128: IAD 2026-12-20 17:55:00 → SEA 2026-12-20 21:01:00; nonstop; 366 minutes. Local airport times.

2026-12-13 → 2026-12-20 · $517.50

  • Delta Air Lines DL541: SEA 2026-12-13 16:30:00 → IAD 2026-12-14 00:31:00; nonstop; 301 minutes. Local airport times.
  • Delta Air Lines DL1015: IAD 2026-12-20 07:00:00 → SEA 2026-12-20 10:05:00; nonstop; 365 minutes. Local airport times.

2026-12-13 → 2026-12-20 · $494.50

  • Alaska Airlines AS367: SEA 2026-12-13 21:40:00 → IAD 2026-12-14 05:35:00; nonstop; 295 minutes. Local airport times.
  • Alaska Airlines AS737: IAD 2026-12-20 17:31:00 → SEA 2026-12-20 20:32:00; nonstop; 361 minutes. Local airport times.

2026-12-13 → 2026-12-20 · $506.00

  • United Airlines UA672: SEA 2026-12-13 08:09:00 → IAD 2026-12-13 16:08:00; nonstop; 299 minutes. Local airport times.
  • United Airlines UA1128: IAD 2026-12-20 17:55:00 → SEA 2026-12-20 21:01:00; nonstop; 366 minutes. Local airport times.

2026-12-13 → 2026-12-20 · $483.00

  • Delta Air Lines DL812 / DL5413: SEA 2026-12-13 06:00:00 → IAD 2026-12-13 16:18:00; 1 stop(s) via DTW; 438 minutes. Local airport times.
    • DL812: SEA 2026-12-13 06:00:00 → DTW 2026-12-13 13:12:00; layover at DTW: 93 minutes.
    • DL5413: DTW 2026-12-13 14:45:00 → IAD 2026-12-13 16:18:00.
  • Delta Air Lines DL5511 / DL734: IAD 2026-12-20 06:00:00 → SEA 2026-12-20 11:09:00; 1 stop(s) via DTW; 489 minutes. Local airport times.
    • DL5511: IAD 2026-12-20 06:00:00 → DTW 2026-12-20 07:46:00; layover at DTW: 69 minutes.
    • DL734: DTW 2026-12-20 08:55:00 → SEA 2026-12-20 11:09:00.

2026-12-13 → 2026-12-20 · $483.00

  • Delta Air Lines DL1120 / DL847: SEA 2026-12-13 13:25:00 → IAD 2026-12-13 23:47:00; 1 stop(s) via SLC; 442 minutes. Local airport times.
    • DL1120: SEA 2026-12-13 13:25:00 → SLC 2026-12-13 16:26:00; layover at SLC: 85 minutes.
    • DL847: SLC 2026-12-13 17:51:00 → IAD 2026-12-13 23:47:00.
  • Delta Air Lines DL5511 / DL734: IAD 2026-12-20 06:00:00 → SEA 2026-12-20 11:09:00; 1 stop(s) via DTW; 489 minutes. Local airport times.
    • DL5511: IAD 2026-12-20 06:00:00 → DTW 2026-12-20 07:46:00; layover at DTW: 69 minutes.
    • DL734: DTW 2026-12-20 08:55:00 → SEA 2026-12-20 11:09:00.

2026-12-13 → 2026-12-20 · $483.00

  • Delta Air Lines DL567 / DL1324: SEA 2026-12-13 22:40:00 → IAD 2026-12-14 09:09:00; 1 stop(s) via ATL; 449 minutes. Local airport times.
    • DL567: SEA 2026-12-13 22:40:00 → ATL 2026-12-14 06:12:00; layover at ATL: 73 minutes.
    • DL1324: ATL 2026-12-14 07:25:00 → IAD 2026-12-14 09:09:00.
  • Delta Air Lines DL5511 / DL734: IAD 2026-12-20 06:00:00 → SEA 2026-12-20 11:09:00; 1 stop(s) via DTW; 489 minutes. Local airport times.
    • DL5511: IAD 2026-12-20 06:00:00 → DTW 2026-12-20 07:46:00; layover at DTW: 69 minutes.
    • DL734: DTW 2026-12-20 08:55:00 → SEA 2026-12-20 11:09:00.

2026-12-13 → 2026-12-20 · $491.00

  • United Airlines UA747 / UA2202: SEA 2026-12-13 10:50:00 → IAD 2026-12-13 21:13:00; 1 stop(s) via ORD; 443 minutes. Local airport times.
    • UA747: SEA 2026-12-13 10:50:00 → ORD 2026-12-13 17:00:00; layover at ORD: 70 minutes.
    • UA2202: ORD 2026-12-13 18:10:00 → IAD 2026-12-13 21:13:00.
  • United Airlines UA1128: IAD 2026-12-20 17:55:00 → SEA 2026-12-20 21:01:00; nonstop; 366 minutes. Local airport times.

2026-12-13 → 2026-12-20 · $491.00

  • United Airlines UA2601 / UA2087: SEA 2026-12-13 05:00:00 → IAD 2026-12-13 15:44:00; 1 stop(s) via DEN; 464 minutes. Local airport times.
    • UA2601: SEA 2026-12-13 05:00:00 → DEN 2026-12-13 08:41:00; layover at DEN: 99 minutes.
    • UA2087: DEN 2026-12-13 10:20:00 → IAD 2026-12-13 15:44:00.
  • United Airlines UA1128: IAD 2026-12-20 17:55:00 → SEA 2026-12-20 21:01:00; nonstop; 366 minutes. Local airport times.

2026-12-13 → 2026-12-20 · $498.00

  • Delta Air Lines DL541: SEA 2026-12-13 16:30:00 → IAD 2026-12-14 00:20:00; nonstop; 290 minutes. Local airport times.
  • Delta Air Lines DL5511 / DL734: IAD 2026-12-20 06:00:00 → SEA 2026-12-20 11:09:00; 1 stop(s) via DTW; 489 minutes. Local airport times.
    • DL5511: IAD 2026-12-20 06:00:00 → DTW 2026-12-20 07:46:00; layover at DTW: 69 minutes.
    • DL734: DTW 2026-12-20 08:55:00 → SEA 2026-12-20 11:09:00.

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For AI assistants

  • This page: Seattle (SEA) to Dulles (IAD) · Dec 13, 2026 · return Dec 20, 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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