All airlines flying from Dulles, Washington (IAD) to Seattle-Tacoma (SEA).

Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Daily 07:00 Dulles, Washington (IAD) 10:04 Seattle-Tacoma (SEA)
Alaska Airlines AS 308 Non-stop Boeing 737 (73J) 6:04 Effective 2025-02-13 through 2025-03-18
Daily 17:15 Dulles, Washington (IAD) 20:20 Seattle-Tacoma (SEA)
United Airlines UA 326 Non-stop Boeing 737-900 (739) 6:05 Effective 2024-10-27 through 2024-11-27
Daily 17:15 Dulles, Washington (IAD) 20:20 Seattle-Tacoma (SEA)
United Airlines UA 326 Non-stop Boeing 737-900 (739) 6:05 Effective 2024-11-29 through 2024-12-18
Daily 17:20 Dulles, Washington (IAD) 20:08 Seattle-Tacoma (SEA)
United Airlines UA 326 Non-stop Boeing 737 MAX 9 (7M9) 5:48 Effective 2024-09-26 through 2024-10-26
Daily 17:26 Dulles, Washington (IAD) 20:14 Seattle-Tacoma (SEA)
United Airlines UA 326 Non-stop Boeing 737 MAX 9 (7M9) 5:48 Valid until 2024-09-25
Mon,Thu,Fri,Sun 17:28 Dulles, Washington (IAD) 20:31 Seattle-Tacoma (SEA)
United Airlines UA 326 Non-stop Boeing 737-800 (738) 6:03 Effective 2024-12-19 through 2024-12-23
Mon,Sun 17:28 Dulles, Washington (IAD) 20:31 Seattle-Tacoma (SEA)
United Airlines UA 326 Non-stop Boeing 737-800 (738) 6:03 Effective 2025-01-05 through 2025-01-06
Daily 17:33 Dulles, Washington (IAD) 20:36 Seattle-Tacoma (SEA)
United Airlines UA 326 Non-stop Boeing 737-800 (738) 6:03 Effective 2024-12-24 through 2025-01-04
Sat 17:35 Dulles, Washington (IAD) 20:38 Seattle-Tacoma (SEA)
United Airlines UA 326 Non-stop Boeing 737-800 (738) 6:03 Operates only on 2024-12-21
Daily 17:35 Dulles, Washington (IAD) 20:36 Seattle-Tacoma (SEA)
United Airlines UA 326 Non-stop Boeing 737-900 (739) 6:01 Effective 2025-01-07 through 2025-02-12
Daily 17:35 Dulles, Washington (IAD) 20:10 Seattle-Tacoma (SEA)
United Airlines UA 326 Non-stop Boeing 737-900 (739) 5:35 Effective from 2025-02-13
Daily 07:00 Dulles, Washington (IAD) 09:55 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737 (73J) 5:55 Effective from 2025-03-19
Thu 15:54 Dulles, Washington (IAD) 18:59 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737-800 (73H) 6:05 Operates only on 2024-12-05
Thu,Fri,Sun 15:54 Dulles, Washington (IAD) 18:59 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737 MAX 9 (7M9) 6:05 Effective 2024-12-06 through 2024-12-13
Mon,Sun 15:54 Dulles, Washington (IAD) 18:59 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737 (73J) 6:05 Effective 2024-12-09 through 2024-12-16
Sun 16:01 Dulles, Washington (IAD) 18:50 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737 (73J) 5:49 Operates only on 2024-10-27
Mon,Sun 16:01 Dulles, Washington (IAD) 18:51 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737 (73J) 5:50 Effective 2024-10-28 through 2024-11-11
Tue-Fri 16:01 Dulles, Washington (IAD) 18:51 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737 MAX 9 (7M9) 5:50 Effective 2024-10-29 through 2024-11-08
Mon,Tue,Fri 16:01 Dulles, Washington (IAD) 18:51 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737 (73J) 5:50 Effective 2024-11-12 through 2024-11-19
Wed,Thu 16:01 Dulles, Washington (IAD) 18:51 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737 MAX 9 (7M9) 5:50 Effective 2024-11-13 through 2024-11-21
Sun 16:01 Dulles, Washington (IAD) 18:51 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737-800 (73H) 5:50 Operates only on 2024-11-17
Mon,Thu,Fri,Sun 16:07 Dulles, Washington (IAD) 18:58 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737 MAX 9 (7M9) 5:51 Effective 2024-10-03 through 2024-10-10
Fri 16:07 Dulles, Washington (IAD) 18:58 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737-800 (73H) 5:51 Operates only on 2024-10-11
Mon,Thu,Fri,Sun 16:07 Dulles, Washington (IAD) 18:58 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737 MAX 9 (7M9) 5:51 Effective 2024-10-13 through 2024-10-25
Daily 16:13 Dulles, Washington (IAD) 18:59 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737 MAX 9 (7M9) 5:46 Valid until 2024-09-04
Thu 16:13 Dulles, Washington (IAD) 18:59 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737-800 (73H) 5:46 Operates only on 2024-09-05
Mon-Sat 16:13 Dulles, Washington (IAD) 18:59 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737 MAX 9 (7M9) 5:46 Effective 2024-09-06 through 2024-09-25
Sun 16:13 Dulles, Washington (IAD) 18:59 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737-800 (73H) 5:46 Effective 2024-09-08 through 2024-09-29
Thu 16:13 Dulles, Washington (IAD) 18:59 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737-800 (73H) 5:46 Operates only on 2024-09-26
Mon,Fri,Sat 16:13 Dulles, Washington (IAD) 18:59 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737 MAX 9 (7M9) 5:46 Effective 2024-09-27 through 2024-09-30
Daily 17:56 Dulles, Washington (IAD) 21:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737 (73J) 6:04 Effective 2025-01-06 through 2025-03-18
Daily 16:00 Dulles, Washington (IAD) 18:56 Seattle-Tacoma (SEA)
Alaska Airlines AS 367 Non-stop Boeing 737 (73J) 5:56 Effective from 2025-04-22
Daily 18:58 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 406 Non-stop Boeing 737 (73J) 6:02 Effective 2024-12-19 through 2025-01-05
Daily 19:00 Dulles, Washington (IAD) 21:56 Seattle-Tacoma (SEA)
Alaska Airlines AS 406 Non-stop Boeing 737 (73J) 5:56 Effective from 2025-03-19
Tue 19:06 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 406 Non-stop Boeing 737 MAX 9 (7M9) 5:54 Operates only on 2024-10-01
Mon,Wed-Fri,Sun 19:06 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 406 Non-stop Boeing 737 (73J) 5:54 Effective 2024-10-02 through 2024-10-07
Tue 19:06 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 406 Non-stop Boeing 737-800 (73H) 5:54 Operates only on 2024-10-08
Tue,Wed 19:06 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 406 Non-stop Boeing 737 MAX 9 (7M9) 5:54 Effective 2024-10-09 through 2024-10-15
Mon,Wed-Fri,Sun 19:06 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 406 Non-stop Boeing 737 (73J) 5:54 Effective 2024-10-10 through 2024-10-21
Tue-Fri 19:06 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 406 Non-stop Boeing 737 (73J) 5:54 Effective 2024-10-22 through 2024-10-25
Mon-Wed,Fri-Sun 19:06 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 406 Non-stop Boeing 737 (73J) 5:54 Effective 2024-11-22 through 2024-12-02
Daily 19:09 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 406 Non-stop Boeing 737 (73J) 5:51 Valid until 2024-09-05
Fri 19:09 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 406 Non-stop Boeing 737 MAX 9 (7M9) 5:51 Operates only on 2024-09-06
Daily 19:09 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 406 Non-stop Boeing 737 (73J) 5:51 Effective 2024-09-07 through 2024-09-19
Fri 19:09 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 406 Non-stop Boeing 737 MAX 9 (7M9) 5:51 Operates only on 2024-09-20
Daily 19:09 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 406 Non-stop Boeing 737 (73J) 5:51 Effective 2024-09-21 through 2024-09-30
Mon,Sun 19:12 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 406 Non-stop Boeing 737 MAX 9 (7M9) 5:48 Effective 2024-10-27 through 2024-10-28
Thu,Fri,Sun 19:12 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 406 Non-stop Boeing 737 (73J) 5:48 Effective 2024-10-31 through 2024-11-21
Mon 19:12 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 406 Non-stop Boeing 737-800 (73H) 5:48 Operates only on 2024-11-04
Mon 19:12 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 406 Non-stop Boeing 737 MAX 9 (7M9) 5:48 Effective 2024-11-11 through 2024-11-18
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All airlines flying from Dulles, Washington (IAD) to Seattle-Tacoma (SEA).
Select flight date:
FLIGHT SCHEDULE
Direct Flights:

Effective 2025-02-13 through 2025-03-18
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 6:04, non-stop
Boeing 737 (73J)

Effective 2024-10-27 through 2024-11-27
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 6:05, non-stop
Boeing 737-900 (739)

Effective 2024-11-29 through 2024-12-18
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 6:05, non-stop
Boeing 737-900 (739)

Effective 2024-09-26 through 2024-10-26
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:48, non-stop
Boeing 737 MAX 9 (7M9)

Valid until 2024-09-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:48, non-stop
Boeing 737 MAX 9 (7M9)

Effective 2024-12-19 through 2024-12-23
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 6:03, non-stop
Boeing 737-800 (738)

Effective 2025-01-05 through 2025-01-06
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 6:03, non-stop
Boeing 737-800 (738)

Effective 2024-12-24 through 2025-01-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 6:03, non-stop
Boeing 737-800 (738)

Operates only on 2024-12-21
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 6:03, non-stop
Boeing 737-800 (738)

Effective 2025-01-07 through 2025-02-12
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 6:01, non-stop
Boeing 737-900 (739)

Effective from 2025-02-13
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:35, non-stop
Boeing 737-900 (739)

Effective from 2025-03-19
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:55, non-stop
Boeing 737 (73J)

Operates only on 2024-12-05
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 6:05, non-stop
Boeing 737-800 (73H)

Effective 2024-12-06 through 2024-12-13
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 6:05, non-stop
Boeing 737 MAX 9 (7M9)

Effective 2024-12-09 through 2024-12-16
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 6:05, non-stop
Boeing 737 (73J)

Operates only on 2024-10-27
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 5:49, non-stop
Boeing 737 (73J)

Effective 2024-10-28 through 2024-11-11
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 5:50, non-stop
Boeing 737 (73J)

Effective 2024-10-29 through 2024-11-08
Mon
-
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 5:50, non-stop
Boeing 737 MAX 9 (7M9)

Effective 2024-11-12 through 2024-11-19
Mon
Tue
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 5:50, non-stop
Boeing 737 (73J)

Effective 2024-11-13 through 2024-11-21
Mon
-
Tue
-
Wed
Thu
Fri
-
Sat
-
Sun
-
Duration: 5:50, non-stop
Boeing 737 MAX 9 (7M9)

Operates only on 2024-11-17
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 5:50, non-stop
Boeing 737-800 (73H)

Effective 2024-10-03 through 2024-10-10
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 5:51, non-stop
Boeing 737 MAX 9 (7M9)

Operates only on 2024-10-11
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 5:51, non-stop
Boeing 737-800 (73H)

Effective 2024-10-13 through 2024-10-25
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 5:51, non-stop
Boeing 737 MAX 9 (7M9)

Valid until 2024-09-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:46, non-stop
Boeing 737 MAX 9 (7M9)

Operates only on 2024-09-05
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 5:46, non-stop
Boeing 737-800 (73H)

Effective 2024-09-06 through 2024-09-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
-
Duration: 5:46, non-stop
Boeing 737 MAX 9 (7M9)

Effective 2024-09-08 through 2024-09-29
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 5:46, non-stop
Boeing 737-800 (73H)

Operates only on 2024-09-26
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 5:46, non-stop
Boeing 737-800 (73H)

Effective 2024-09-27 through 2024-09-30
Mon
Tue
-
Wed
-
Thu
-
Fri
Sat
Sun
-
Duration: 5:46, non-stop
Boeing 737 MAX 9 (7M9)

Effective 2025-01-06 through 2025-03-18
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 6:04, non-stop
Boeing 737 (73J)

Effective from 2025-04-22
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:56, non-stop
Boeing 737 (73J)

Effective 2024-12-19 through 2025-01-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 6:02, non-stop
Boeing 737 (73J)

Effective from 2025-03-19
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:56, non-stop
Boeing 737 (73J)

Operates only on 2024-10-01
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 5:54, non-stop
Boeing 737 MAX 9 (7M9)

Effective 2024-10-02 through 2024-10-07
Mon
Tue
-
Wed
Thu
Fri
Sat
-
Sun
Duration: 5:54, non-stop
Boeing 737 (73J)

Operates only on 2024-10-08
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 5:54, non-stop
Boeing 737-800 (73H)

Effective 2024-10-09 through 2024-10-15
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 5:54, non-stop
Boeing 737 MAX 9 (7M9)

Effective 2024-10-10 through 2024-10-21
Mon
Tue
-
Wed
Thu
Fri
Sat
-
Sun
Duration: 5:54, non-stop
Boeing 737 (73J)

Effective 2024-10-22 through 2024-10-25
Mon
-
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 5:54, non-stop
Boeing 737 (73J)

Effective 2024-11-22 through 2024-12-02
Mon
Tue
Wed
Thu
-
Fri
Sat
Sun
Duration: 5:54, non-stop
Boeing 737 (73J)

Valid until 2024-09-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:51, non-stop
Boeing 737 (73J)

Operates only on 2024-09-06
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 5:51, non-stop
Boeing 737 MAX 9 (7M9)

Effective 2024-09-07 through 2024-09-19
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:51, non-stop
Boeing 737 (73J)

Operates only on 2024-09-20
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 5:51, non-stop
Boeing 737 MAX 9 (7M9)

Effective 2024-09-21 through 2024-09-30
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:51, non-stop
Boeing 737 (73J)

Effective 2024-10-27 through 2024-10-28
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 5:48, non-stop
Boeing 737 MAX 9 (7M9)

Effective 2024-10-31 through 2024-11-21
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 5:48, non-stop
Boeing 737 (73J)

Operates only on 2024-11-04
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 5:48, non-stop
Boeing 737-800 (73H)

Effective 2024-11-11 through 2024-11-18
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 5:48, non-stop
Boeing 737 MAX 9 (7M9)
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  • A domestic route departing from the Dulles, Washington 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 6:07.