All airlines flying from Washington Dulles (IAD) to Seattle-Tacoma (SEA).
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| FLIGHT SCHEDULE |
|---|
| Direct Codeshare Flights: |
| Daily
19:18
Washington Dulles (IAD)
22:06
Seattle-Tacoma (SEA) Air Tahiti Nui TN 2590 Non-stop Boeing 737 (73J) 5:48 Effective from 2026-06-10 Codeshare flight, operated by Alaska Airlines.(AS 737) |
| Daily
09:00
Washington Dulles (IAD)
11:39
Seattle-Tacoma (SEA) Air Tahiti Nui TN 2722 Non-stop Boeing 737 (73J) 5:39 Effective 2026-05-13 through 2026-06-09 Codeshare flight, operated by Alaska Airlines.(AS 375) |
| Daily
09:00
Washington Dulles (IAD)
11:50
Seattle-Tacoma (SEA) Air Tahiti Nui TN 2722 Non-stop Boeing 737 (73J) 5:50 Effective from 2026-06-10 Codeshare flight, operated by Alaska Airlines.(AS 375) |
| Daily
10:00
Washington Dulles (IAD)
12:54
Seattle-Tacoma (SEA) Air Tahiti Nui TN 2722 Non-stop Boeing 737 (73J) 5:54 Effective 2026-04-22 through 2026-05-12 Codeshare flight, operated by Alaska Airlines.(AS 375) |
| Daily
17:35
Washington Dulles (IAD)
20:10
Seattle-Tacoma (SEA) Copa Airlines CM 2766 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) Copa Airlines CM 2766 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) Copa Airlines CM 2766 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) Copa Airlines CM 2766 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) Copa Airlines CM 2766 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) Copa Airlines CM 2766 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) Copa Airlines CM 2766 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) Copa Airlines CM 2766 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
19:15
Washington Dulles (IAD)
22:00
Seattle-Tacoma (SEA) Qatar Airways QR 2971 Non-stop Boeing 737 (73J) 5:45 Effective 2026-05-13 through 2026-06-09 Codeshare flight, operated by Alaska Airlines.(AS 737) |
| Wed
18:04
Washington Dulles (IAD)
21:08
Seattle-Tacoma (SEA) Qatar Airways QR 2990 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) Qatar Airways QR 2990 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) Qatar Airways QR 2990 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) Qatar Airways QR 2990 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) Qatar Airways QR 2990 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) Qatar Airways QR 2990 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) Qatar Airways QR 2990 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) Qatar Airways QR 2990 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) Qatar Airways QR 2990 Non-stop Boeing 737 (73J) 5:59 Effective 2026-03-19 through 2026-05-12 Codeshare flight, operated by Alaska Airlines.(AS 406) |
| Daily
19:18
Washington Dulles (IAD)
22:06
Seattle-Tacoma (SEA) Qatar Airways QR 2997 Non-stop Boeing 737 (73J) 5:48 Effective from 2026-06-10 Codeshare flight, operated by Alaska Airlines.(AS 737) |
| Mon,Tue,Fri-Sun
07:05
Washington Dulles (IAD)
10:02
Seattle-Tacoma (SEA) Korean Air KE 3026 Non-stop Airbus A220-300 (223) 5:57 Valid until 2026-01-04 Codeshare flight, operated by Delta Air Lines.(DL 1084) |
| Mon
07:30
Washington Dulles (IAD)
10:29
Seattle-Tacoma (SEA) Korean Air KE 3026 Non-stop Airbus A220-300 (223) 5:59 Operates only on 2026-01-05 Codeshare flight, operated by Delta Air Lines.(DL 1015) |
| Daily
07:00
Washington Dulles (IAD)
10:01
Seattle-Tacoma (SEA) Korean Air KE 3182 Non-stop Airbus A220-300 (223) 6:01 Effective 2026-03-08 through 2026-03-14 Codeshare flight, operated by Delta Air Lines.(DL 1015) |
| Daily
07:00
Washington Dulles (IAD)
10:03
Seattle-Tacoma (SEA) Korean Air KE 3182 Non-stop Airbus A220-300 (223) 6:03 Effective 2026-03-15 through 2026-04-12 Codeshare flight, operated by Delta Air Lines.(DL 1015) |
| Daily
07:05
Washington Dulles (IAD)
10:05
Seattle-Tacoma (SEA) Korean Air KE 3182 Non-stop Airbus A220-300 (223) 6:00 Effective from 2026-10-06 Codeshare flight, operated by Delta Air Lines.(DL 1015) |
| Daily
07:10
Washington Dulles (IAD)
10:03
Seattle-Tacoma (SEA) Korean Air KE 3182 Non-stop Airbus A220-300 (223) 5:53 Effective 2026-04-13 through 2026-10-05 Codeshare flight, operated by Delta Air Lines.(DL 1015) |
| Daily
07:30
Washington Dulles (IAD)
10:29
Seattle-Tacoma (SEA) Korean Air KE 3182 Non-stop Airbus A220-300 (223) 5:59 Effective 2026-01-06 through 2026-03-07 Codeshare flight, operated by Delta Air Lines.(DL 1015) |
| Tue,Fri-Sun
17:35
Washington Dulles (IAD)
20:10
Seattle-Tacoma (SEA) ITA Airways AZ 4416 Non-stop Boeing 737-900 (739) 5:35 Effective 2026-05-22 through 2026-05-31 Codeshare flight, operated by United Airlines.(UA 326) |
| Daily
17:35
Washington Dulles (IAD)
20:10
Seattle-Tacoma (SEA) ITA Airways AZ 4416 Non-stop Boeing 737-900 (739) 5:35 Effective 2026-06-01 through 2026-09-29 Codeshare flight, operated by United Airlines.(UA 326) |
| Tue,Fri-Sun
17:35
Washington Dulles (IAD)
20:10
Seattle-Tacoma (SEA) ITA Airways AZ 4416 Non-stop Boeing 737-900 (739) 5:35 Effective 2026-10-02 through 2026-10-24 Codeshare flight, operated by United Airlines.(UA 326) |
| Tue,Thu,Sun
17:55
Washington Dulles (IAD)
20:56
Seattle-Tacoma (SEA) ITA Airways AZ 4416 Non-stop Boeing 737 MAX 8 (7M8) 6:01 Effective 2026-03-01 through 2026-03-05 Codeshare flight, operated by United Airlines.(UA 326) |
| Sun
17:55
Washington Dulles (IAD)
20:56
Seattle-Tacoma (SEA) ITA Airways AZ 4416 Non-stop Boeing 737-900 (739) 6:01 Effective 2026-03-08 through 2026-03-22 Codeshare flight, operated by United Airlines.(UA 1303) |
| Tue,Thu
17:55
Washington Dulles (IAD)
20:56
Seattle-Tacoma (SEA) ITA Airways AZ 4416 Non-stop Boeing 737 MAX 8 (7M8) 6:01 Effective 2026-03-10 through 2026-03-26 Codeshare flight, operated by United Airlines.(UA 326) |
| Tue,Fri-Sun
17:55
Washington Dulles (IAD)
20:52
Seattle-Tacoma (SEA) ITA Airways AZ 4416 Non-stop Boeing 737 MAX 9 (7M9) 5:57 Effective 2026-03-29 through 2026-05-19 Codeshare flight, operated by United Airlines.(UA 326) |
| Tue,Fri,Sun
09:00
Washington Dulles (IAD)
11:39
Seattle-Tacoma (SEA) Finnair AY 4588 Non-stop Boeing 737 (73J) 5:39 Effective 2026-05-15 through 2026-06-09 Codeshare flight, operated by Alaska Airlines.(AS 375) |
| Tue,Fri,Sun
09:00
Washington Dulles (IAD)
11:50
Seattle-Tacoma (SEA) Finnair AY 4588 Non-stop Boeing 737 (73J) 5:50 Effective 2026-06-12 through 2026-08-14 Codeshare flight, operated by Alaska Airlines.(AS 375) |
| Mon,Fri
09:00
Washington Dulles (IAD)
11:50
Seattle-Tacoma (SEA) Finnair AY 4588 Non-stop Boeing 737 (73J) 5:50 Effective 2026-08-17 through 2026-09-28 Codeshare flight, operated by Alaska Airlines.(AS 375) |
| Tue
10:00
Washington Dulles (IAD)
12:54
Seattle-Tacoma (SEA) Finnair AY 4588 Non-stop Boeing 737 (73J) 5:54 Effective 2026-04-28 through 2026-05-05 Codeshare flight, operated by Alaska Airlines.(AS 375) |
| Tue,Sun
10:00
Washington Dulles (IAD)
12:54
Seattle-Tacoma (SEA) Finnair AY 4588 Non-stop Boeing 737 (73J) 5:54 Effective 2026-05-10 through 2026-05-12 Codeshare flight, operated by Alaska Airlines.(AS 375) |
| Wed
18:04
Washington Dulles (IAD)
21:08
Seattle-Tacoma (SEA) Hawaiian Airlines HA 4836 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) Hawaiian Airlines HA 4836 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) Hawaiian Airlines HA 4836 Non-stop Boeing 737 (737) 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) Hawaiian Airlines HA 4836 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) Hawaiian Airlines HA 4836 Non-stop Boeing 737 (737) 6:08 Effective 2026-02-20 through 2026-03-09 Codeshare flight, operated by Alaska Airlines.(AS 406) |
| Tue,Fri-Sun
18:43
Washington Dulles (IAD)
21:32
Seattle-Tacoma (SEA) Hawaiian Airlines HA 4836 Non-stop Boeing 737 (737) 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) Hawaiian Airlines HA 4836 Non-stop Boeing 737 MAX 9 (7M9) 5:49 Valid until 2026-01-05 Codeshare flight, operated by Alaska Airlines.(AS 409) |
| Wed
07:00
Washington Dulles (IAD)
09:45
Seattle-Tacoma (SEA) Hawaiian Airlines HA 4967 Non-stop Boeing 737 (737) 5:45 Operates only on 2026-03-18 Codeshare flight, operated by Alaska Airlines.(AS 351) |
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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.
