All airlines flying from Washington Dulles (IAD) to Seattle-Tacoma (SEA).
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| FLIGHT SCHEDULE |
|---|
| Non-Direct Flights: |
| Daily
08:15
Washington Dulles (IAD)
13:14
Seattle-Tacoma (SEA) United Airlines UA 1424 1-stop Airbus A321neo (32Q) 7:59 Effective 2026-03-29 through 2026-04-29 |
| Daily
08:15
Washington Dulles (IAD)
13:20
Seattle-Tacoma (SEA) United Airlines UA 1424 1-stop Boeing 757-300 (753) 8:05 Effective 2026-04-30 through 2026-05-20 |
| Daily
08:15
Washington Dulles (IAD)
13:20
Seattle-Tacoma (SEA) United Airlines UA 1424 1-stop Boeing 737-900 (739) 8:05 Effective from 2026-05-21 |
| Daily
12:35
Washington Dulles (IAD)
20:58
Seattle-Tacoma (SEA) United Airlines UA 1434 1-stop Boeing 737-900 (739) 11:23 Effective 2026-03-05 through 2026-03-28 |
| Mon,Thu,Fri,Sun
17:17
Washington Dulles (IAD)
22:43
Seattle-Tacoma (SEA) United Airlines UA 2497 1-stop Boeing 737-900 (739) 8:26 Effective 2026-01-08 through 2026-02-09 |
| Mon-Fri
08:00
Washington Dulles (IAD)
19:25
Seattle-Tacoma (SEA) United Airlines UA 683 2-stop Boeing 737-900 (739) 14:25 Effective 2026-03-05 through 2026-03-27 |
| Direct Codeshare Flights: |
| Mon,Wed,Thu,Sat
13:00
Washington Dulles (IAD)
15:35
Seattle-Tacoma (SEA) Ethiopian Airlines ET 1368 Non-stop Boeing 737-900 (739) 5:35 Effective 2026-05-21 through 2026-08-17 Codeshare flight, operated by United Airlines.(UA 788) |
| Tue,Fri,Sun
17:35
Washington Dulles (IAD)
20:10
Seattle-Tacoma (SEA) Ethiopian Airlines ET 1368 Non-stop Boeing 737-900 (739) 5:35 Effective 2026-05-22 through 2026-08-18 Codeshare flight, operated by United Airlines.(UA 326) |
| Daily
17:35
Washington Dulles (IAD)
20:10
Seattle-Tacoma (SEA) Ethiopian Airlines ET 1368 Non-stop Boeing 737-900 (739) 5:35 Effective from 2026-08-19 Codeshare flight, operated by United Airlines.(UA 326) |
| Daily
17:55
Washington Dulles (IAD)
20:57
Seattle-Tacoma (SEA) Ethiopian Airlines ET 1368 Non-stop Boeing 737 MAX 9 (7M9) 6:02 Valid until 2026-01-05 Codeshare flight, operated by United Airlines.(UA 326) |
| Daily
17:55
Washington Dulles (IAD)
20:57
Seattle-Tacoma (SEA) Ethiopian Airlines ET 1368 Non-stop Boeing 737-900 (739) 6:02 Effective 2026-01-06 through 2026-02-11 Codeshare flight, operated by United Airlines.(UA 1159) |
| Daily
17:55
Washington Dulles (IAD)
20:56
Seattle-Tacoma (SEA) Ethiopian Airlines ET 1368 Non-stop Boeing 737 MAX 8 (7M8) 6:01 Effective 2026-02-12 through 2026-03-05 Codeshare flight, operated by United Airlines.(UA 326) |
| Fri,Sat
17:55
Washington Dulles (IAD)
20:56
Seattle-Tacoma (SEA) Ethiopian Airlines ET 1368 Non-stop Boeing 737-800 (738) 6:01 Effective 2026-03-06 through 2026-03-28 Codeshare flight, operated by United Airlines.(UA 1303) |
| Sun
17:55
Washington Dulles (IAD)
20:56
Seattle-Tacoma (SEA) Ethiopian Airlines ET 1368 Non-stop Boeing 737-900 (739) 6:01 Effective 2026-03-08 through 2026-03-22 Codeshare flight, operated by United Airlines.(UA 1303) |
| Mon-Thu
17:55
Washington Dulles (IAD)
20:56
Seattle-Tacoma (SEA) Ethiopian Airlines ET 1368 Non-stop Boeing 737 MAX 8 (7M8) 6:01 Effective 2026-03-09 through 2026-03-26 Codeshare flight, operated by United Airlines.(UA 326) |
| Daily
17:55
Washington Dulles (IAD)
20:52
Seattle-Tacoma (SEA) Ethiopian Airlines ET 1368 Non-stop Boeing 737 MAX 9 (7M9) 5:57 Effective 2026-03-29 through 2026-05-20 Codeshare flight, operated by United Airlines.(UA 326) |
| Daily
17:35
Washington Dulles (IAD)
20:10
Seattle-Tacoma (SEA) Avianca AV 2028 Non-stop Boeing 737-900 (739) 5:35 Effective from 2026-05-21 Codeshare flight, operated by United Airlines.(UA 326) |
| Daily
17:55
Washington Dulles (IAD)
20:57
Seattle-Tacoma (SEA) Avianca AV 2028 Non-stop Boeing 737 MAX 9 (7M9) 6:02 Valid until 2026-01-05 Codeshare flight, operated by United Airlines.(UA 326) |
| Daily
17:55
Washington Dulles (IAD)
20:57
Seattle-Tacoma (SEA) Avianca AV 2028 Non-stop Boeing 737-900 (739) 6:02 Effective 2026-01-06 through 2026-02-11 Codeshare flight, operated by United Airlines.(UA 1159) |
| Daily
17:55
Washington Dulles (IAD)
20:56
Seattle-Tacoma (SEA) Avianca AV 2028 Non-stop Boeing 737 MAX 8 (7M8) 6:01 Effective 2026-02-12 through 2026-03-05 Codeshare flight, operated by United Airlines.(UA 326) |
| Fri,Sat
17:55
Washington Dulles (IAD)
20:56
Seattle-Tacoma (SEA) Avianca AV 2028 Non-stop Boeing 737-800 (738) 6:01 Effective 2026-03-06 through 2026-03-28 Codeshare flight, operated by United Airlines.(UA 1303) |
| Sun
17:55
Washington Dulles (IAD)
20:56
Seattle-Tacoma (SEA) Avianca AV 2028 Non-stop Boeing 737-900 (739) 6:01 Effective 2026-03-08 through 2026-03-22 Codeshare flight, operated by United Airlines.(UA 1303) |
| Mon-Thu
17:55
Washington Dulles (IAD)
20:56
Seattle-Tacoma (SEA) Avianca AV 2028 Non-stop Boeing 737 MAX 8 (7M8) 6:01 Effective 2026-03-09 through 2026-03-26 Codeshare flight, operated by United Airlines.(UA 326) |
| Daily
17:55
Washington Dulles (IAD)
20:52
Seattle-Tacoma (SEA) Avianca AV 2028 Non-stop Boeing 737 MAX 9 (7M9) 5:57 Effective 2026-03-29 through 2026-05-20 Codeshare flight, operated by United Airlines.(UA 326) |
| Daily
06:30
Washington Dulles (IAD)
09:10
Seattle-Tacoma (SEA) Air Tahiti Nui TN 2395 Non-stop Boeing 737 (73J) 5:40 Effective 2026-05-13 through 2026-06-09 Codeshare flight, operated by Alaska Airlines.(AS 351) |
| Daily
06:30
Washington Dulles (IAD)
09:19
Seattle-Tacoma (SEA) Air Tahiti Nui TN 2395 Non-stop Boeing 737 (73J) 5:49 Effective from 2026-06-10 Codeshare flight, operated by Alaska Airlines.(AS 351) |
| Wed
07:00
Washington Dulles (IAD)
09:45
Seattle-Tacoma (SEA) Air Tahiti Nui TN 2395 Non-stop Boeing 737 (73J) 5:45 Operates only on 2026-03-18 Codeshare flight, operated by Alaska Airlines.(AS 351) |
| Daily
07:00
Washington Dulles (IAD)
09:54
Seattle-Tacoma (SEA) Air Tahiti Nui TN 2395 Non-stop Boeing 737 (73J) 5:54 Effective 2026-03-19 through 2026-05-12 Codeshare flight, operated by Alaska Airlines.(AS 351) |
| Mon,Tue,Fri-Sun
07:05
Washington Dulles (IAD)
10:05
Seattle-Tacoma (SEA) Air Tahiti Nui TN 2395 Non-stop Boeing 737 MAX 9 (7M9) 6:00 Effective 2026-02-13 through 2026-02-28 Codeshare flight, operated by Alaska Airlines.(AS 351) |
| Wed
07:05
Washington Dulles (IAD)
10:05
Seattle-Tacoma (SEA) Air Tahiti Nui TN 2395 Non-stop Boeing 737-800 (73H) 6:00 Operates only on 2026-02-18 Codeshare flight, operated by Alaska Airlines.(AS 351) |
| Wed,Thu
07:05
Washington Dulles (IAD)
10:05
Seattle-Tacoma (SEA) Air Tahiti Nui TN 2395 Non-stop Boeing 737 (73J) 6:00 Effective 2026-02-19 through 2026-02-26 Codeshare flight, operated by Alaska Airlines.(AS 351) |
| Tue-Thu,Sun
07:05
Washington Dulles (IAD)
10:05
Seattle-Tacoma (SEA) Air Tahiti Nui TN 2395 Non-stop Boeing 737 (73J) 6:00 Effective 2026-03-01 through 2026-03-05 Codeshare flight, operated by Alaska Airlines.(AS 351) |
| Mon,Fri,Sat
07:05
Washington Dulles (IAD)
10:05
Seattle-Tacoma (SEA) Air Tahiti Nui TN 2395 Non-stop Boeing 737 MAX 9 (7M9) 6:00 Effective 2026-03-02 through 2026-03-07 Codeshare flight, operated by Alaska Airlines.(AS 351) |
| Wed,Thu,Sun
07:05
Washington Dulles (IAD)
10:05
Seattle-Tacoma (SEA) Air Tahiti Nui TN 2395 Non-stop Boeing 737 (73J) 6:00 Effective 2026-03-08 through 2026-03-15 Codeshare flight, operated by Alaska Airlines.(AS 351) |
| Mon,Tue,Fri,Sat
07:05
Washington Dulles (IAD)
10:05
Seattle-Tacoma (SEA) Air Tahiti Nui TN 2395 Non-stop Boeing 737 MAX 9 (7M9) 6:00 Effective 2026-03-09 through 2026-03-17 Codeshare flight, operated by Alaska Airlines.(AS 351) |
| Daily
07:33
Washington Dulles (IAD)
10:20
Seattle-Tacoma (SEA) Air Tahiti Nui TN 2395 Non-stop Boeing 737 MAX 9 (7M9) 5:47 Valid until 2026-01-04 Codeshare flight, operated by Alaska Airlines.(AS 351) |
| Mon,Tue
07:33
Washington Dulles (IAD)
10:20
Seattle-Tacoma (SEA) Air Tahiti Nui TN 2395 Non-stop Boeing 737 (73J) 5:47 Effective 2026-01-05 through 2026-01-06 Codeshare flight, operated by Alaska Airlines.(AS 351) |
| Mon,Wed-Sat
07:00
Washington Dulles (IAD)
10:01
Seattle-Tacoma (SEA) Virgin Atlantic VS 2534 Non-stop Airbus A220-300 (223) 6:01 Effective 2026-03-09 through 2026-03-14 Codeshare flight, operated by Delta Air Lines.(DL 1015) |
| Mon,Wed-Sun
07:00
Washington Dulles (IAD)
10:03
Seattle-Tacoma (SEA) Virgin Atlantic VS 2534 Non-stop Airbus A220-300 (223) 6:03 Effective 2026-03-15 through 2026-03-29 Codeshare flight, operated by Delta Air Lines.(DL 1015) |
| Daily
07:05
Washington Dulles (IAD)
10:05
Seattle-Tacoma (SEA) Virgin Atlantic VS 2534 Non-stop Airbus A220-300 (223) 6:00 Effective from 2026-10-26 Codeshare flight, operated by Delta Air Lines.(DL 1015) |
| Wed
18:04
Washington Dulles (IAD)
21:08
Seattle-Tacoma (SEA) Air Tahiti Nui TN 2556 Non-stop Boeing 737 MAX 8 (7M8) 6:04 Operates only on 2026-01-07 Codeshare flight, operated by Alaska Airlines.(AS 406) |
| Daily
18:04
Washington Dulles (IAD)
21:08
Seattle-Tacoma (SEA) Air Tahiti Nui TN 2556 Non-stop Boeing 737 MAX 9 (7M9) 6:04 Effective 2026-01-08 through 2026-02-11 Codeshare flight, operated by Alaska Airlines.(AS 406) |
| Mon,Thu,Sun
18:27
Washington Dulles (IAD)
21:35
Seattle-Tacoma (SEA) Air Tahiti Nui TN 2556 Non-stop Boeing 737 (73J) 6:08 Effective 2026-02-12 through 2026-02-19 Codeshare flight, operated by Alaska Airlines.(AS 406) |
| Fri
18:27
Washington Dulles (IAD)
21:35
Seattle-Tacoma (SEA) Air Tahiti Nui TN 2556 Non-stop Boeing 737 MAX 9 (7M9) 6:08 Operates only on 2026-02-13 Codeshare flight, operated by Alaska Airlines.(AS 406) |
| Mon,Thu,Fri,Sun
18:27
Washington Dulles (IAD)
21:35
Seattle-Tacoma (SEA) Air Tahiti Nui TN 2556 Non-stop Boeing 737 (73J) 6:08 Effective 2026-02-20 through 2026-03-16 Codeshare flight, operated by Alaska Airlines.(AS 406) |
| Tue,Fri-Sun
18:43
Washington Dulles (IAD)
21:32
Seattle-Tacoma (SEA) Air Tahiti Nui TN 2556 Non-stop Boeing 737 (73J) 5:49 Valid until 2026-01-06 Codeshare flight, operated by Alaska Airlines.(AS 409) |
| Mon,Thu
18:43
Washington Dulles (IAD)
21:32
Seattle-Tacoma (SEA) Air Tahiti Nui TN 2556 Non-stop Boeing 737 MAX 9 (7M9) 5:49 Valid until 2026-01-05 Codeshare flight, operated by Alaska Airlines.(AS 409) |
| Wed
18:55
Washington Dulles (IAD)
21:40
Seattle-Tacoma (SEA) Air Tahiti Nui TN 2556 Non-stop Boeing 737 (73J) 5:45 Operates only on 2026-03-18 Codeshare flight, operated by Alaska Airlines.(AS 406) |
| Daily
19:01
Washington Dulles (IAD)
22:00
Seattle-Tacoma (SEA) Air Tahiti Nui TN 2556 Non-stop Boeing 737 (73J) 5:59 Effective 2026-03-19 through 2026-05-12 Codeshare flight, operated by Alaska Airlines.(AS 406) |
| Daily
19:15
Washington Dulles (IAD)
22:00
Seattle-Tacoma (SEA) Air Tahiti Nui TN 2581 Non-stop Boeing 737 (73J) 5:45 Effective 2026-05-13 through 2026-06-09 Codeshare flight, operated by Alaska Airlines.(AS 737) |
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Parallax here IAD-SEA
- A domestic route departing from the Washington Dulles airport (IAD) and arriving at Seattle-Tacoma airport (SEA).
- The flight distance is 2299 miles, or 3699 km.
- The timezone of the departure airport is UTC-5 , and the timezone of the arrival airport is UTC-8 . Current time at the point of departure is (loading...), and (loading...) at the point of arrival. There is a (loading...) hour time difference between the airports.
- For direct flights, the flight time varies between 5:35 and 6:08.
