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

Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Daily 17:15 Dulles, Washington (IAD) 20:20 Seattle-Tacoma (SEA)
United Airlines UA 326 Non-stop Boeing 737 MAX 9 (7M9) 6:05 Effective 2024-01-09 through 2024-02-14
Daily 17:20 Dulles, Washington (IAD) 20:19 Seattle-Tacoma (SEA)
United Airlines UA 326 Non-stop Boeing 737 MAX 9 (7M9) 5:59 Effective 2024-02-15 through 2024-03-06
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 2024-03-31
Mon-Thu 17:45 Dulles, Washington (IAD) 20:49 Seattle-Tacoma (SEA)
United Airlines UA 326 Non-stop Boeing 737 MAX 8 (7M8) 6:04 Valid until 2024-01-04
Fri,Sat 17:45 Dulles, Washington (IAD) 20:49 Seattle-Tacoma (SEA)
United Airlines UA 326 Non-stop Boeing 737-900 (739) 6:04 Valid until 2024-01-06
Mon,Sun 17:45 Dulles, Washington (IAD) 20:50 Seattle-Tacoma (SEA)
United Airlines UA 326 Non-stop Airbus A319 (319) 6:05 Effective 2024-01-07 through 2024-01-08
Daily 17:00 Dulles, Washington (IAD) 19:56 Seattle-Tacoma (SEA)
Alaska Airlines AS 327 Non-stop Boeing 737 (73J) 5:56 Effective from 2024-05-16
Mon 18:55 Dulles, Washington (IAD) 21:58 Seattle-Tacoma (SEA)
Alaska Airlines AS 343 Non-stop Boeing 737 (73J) 6:03 Operates only on 2024-01-08
Daily 07:00 Dulles, Washington (IAD) 10:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737 (73J) 6:00 Effective 2024-02-16 through 2024-03-13
Daily 07:00 Dulles, Washington (IAD) 09:55 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737 (73J) 5:55 Effective from 2024-05-16
Mon,Thu,Fri,Sun 16:12 Dulles, Washington (IAD) 19:03 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737 (73J) 5:51 Effective 2024-04-18 through 2024-05-13
Tue 18:55 Dulles, Washington (IAD) 21:58 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737 (73J) 6:03 Operates only on 2024-01-09
Daily 18:55 Dulles, Washington (IAD) 21:58 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737 MAX 9 (7M9) 6:03 Effective 2024-01-10 through 2024-01-17
Mon,Tue,Thu 18:55 Dulles, Washington (IAD) 21:58 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737 (73J) 6:03 Effective 2024-01-18 through 2024-01-23
Wed-Sun 18:55 Dulles, Washington (IAD) 21:58 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737 MAX 9 (7M9) 6:03 Effective 2024-01-19 through 2024-01-28
Mon,Wed,Sat,Sun 18:55 Dulles, Washington (IAD) 21:58 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737 MAX 9 (7M9) 6:03 Effective 2024-01-29 through 2024-02-05
Tue,Thu 18:55 Dulles, Washington (IAD) 21:58 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737 (73J) 6:03 Effective 2024-01-30 through 2024-02-01
Fri 18:55 Dulles, Washington (IAD) 21:58 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737-800 (73H) 6:03 Operates only on 2024-02-02
Daily 18:55 Dulles, Washington (IAD) 21:58 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737 MAX 9 (7M9) 6:03 Effective 2024-02-06 through 2024-02-14
Mon,Wed,Thu,Sat 19:00 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737 (73J) 6:00 Effective 2024-03-14 through 2024-03-23
Tue,Fri,Sun 19:00 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737 MAX 9 (7M9) 6:00 Effective 2024-03-15 through 2024-03-24
Mon-Fri,Sun 19:00 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737 MAX 9 (7M9) 6:00 Effective 2024-03-25 through 2024-04-05
Sat 19:00 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737 (73J) 6:00 Effective 2024-03-30 through 2024-04-13
Sun 19:00 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737-800 (73H) 6:00 Operates only on 2024-04-07
Mon-Fri,Sun 19:00 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737 MAX 9 (7M9) 6:00 Effective 2024-04-08 through 2024-04-15
Mon,Wed 19:01 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737-800 (73H) 5:59 Valid until 2024-01-03
Tue,Thu-Sun 19:01 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 351 Non-stop Boeing 737 (73J) 5:59 Effective 2024-01-02 through 2024-01-07
Sat 17:55 Dulles, Washington (IAD) 20:46 Seattle-Tacoma (SEA)
Alaska Airlines AS 396 Non-stop Boeing 737 (73J) 5:51 Effective 2024-04-20 through 2024-05-11
Mon,Thu,Fri,Sun 18:55 Dulles, Washington (IAD) 21:59 Seattle-Tacoma (SEA)
Alaska Airlines AS 406 Non-stop Boeing 737 (73J) 6:04 Effective 2024-02-15 through 2024-03-03
Mon 18:55 Dulles, Washington (IAD) 21:59 Seattle-Tacoma (SEA)
Alaska Airlines AS 406 Non-stop Boeing 737 MAX 9 (7M9) 6:04 Effective 2024-03-04 through 2024-03-11
Thu,Fri,Sun 18:55 Dulles, Washington (IAD) 21:59 Seattle-Tacoma (SEA)
Alaska Airlines AS 406 Non-stop Boeing 737 (73J) 6:04 Effective 2024-03-07 through 2024-03-10
Daily 19:00 Dulles, Washington (IAD) 21:56 Seattle-Tacoma (SEA)
Alaska Airlines AS 406 Non-stop Boeing 737 (73J) 5:56 Effective from 2024-05-16
Mon-Fri,Sun 19:09 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Alaska Airlines AS 406 Non-stop Boeing 737 (73J) 5:51 Effective 2024-04-16 through 2024-05-15
Daily 08:00 Dulles, Washington (IAD) 10:54 Seattle-Tacoma (SEA)
Delta Air Lines DL 438 Non-stop Airbus A220-100 (221) 5:54 Effective from 2024-09-09
Daily 17:25 Dulles, Washington (IAD) 20:30 Seattle-Tacoma (SEA)
Delta Air Lines DL 441 Non-stop Airbus A220-300 (223) 6:05 Valid until 2024-01-07
Daily 07:00 Dulles, Washington (IAD) 09:55 Seattle-Tacoma (SEA)
Alaska Airlines AS 499 Non-stop Boeing 737 (73J) 5:55 Valid until 2024-01-07
Thu,Sat,Sun 07:40 Dulles, Washington (IAD) 10:31 Seattle-Tacoma (SEA)
Alaska Airlines AS 499 Non-stop Boeing 737 (73J) 5:51 Effective 2024-03-14 through 2024-03-17
Mon-Fri 07:40 Dulles, Washington (IAD) 10:31 Seattle-Tacoma (SEA)
Alaska Airlines AS 499 Non-stop Boeing 737 MAX 9 (7M9) 5:51 Effective 2024-03-15 through 2024-03-21
Thu-Sun 07:40 Dulles, Washington (IAD) 10:31 Seattle-Tacoma (SEA)
Alaska Airlines AS 499 Non-stop Boeing 737 (73J) 5:51 Effective 2024-03-22 through 2024-04-04
Mon 07:40 Dulles, Washington (IAD) 10:30 Seattle-Tacoma (SEA)
Alaska Airlines AS 499 Non-stop Boeing 737 MAX 9 (7M9) 5:50 Operates only on 2024-03-25
Mon-Wed 07:40 Dulles, Washington (IAD) 10:31 Seattle-Tacoma (SEA)
Alaska Airlines AS 499 Non-stop Boeing 737 MAX 9 (7M9) 5:51 Effective 2024-03-26 through 2024-04-03
Mon-Wed,Fri,Sat 07:40 Dulles, Washington (IAD) 10:31 Seattle-Tacoma (SEA)
Alaska Airlines AS 499 Non-stop Boeing 737 MAX 9 (7M9) 5:51 Effective 2024-04-05 through 2024-04-15
Thu,Sun 07:40 Dulles, Washington (IAD) 10:31 Seattle-Tacoma (SEA)
Alaska Airlines AS 499 Non-stop Boeing 737 (73J) 5:51 Effective 2024-04-07 through 2024-04-14
Daily 07:40 Dulles, Washington (IAD) 10:20 Seattle-Tacoma (SEA)
Alaska Airlines AS 499 Non-stop Boeing 737 (73J) 5:40 Effective 2024-04-16 through 2024-05-15
Daily 17:20 Dulles, Washington (IAD) 20:12 Seattle-Tacoma (SEA)
Delta Air Lines DL 508 Non-stop Airbus A220-100 (221) 5:52 Effective from 2024-09-09
Daily 17:15 Dulles, Washington (IAD) 20:15 Seattle-Tacoma (SEA)
Delta Air Lines DL 544 Non-stop Airbus A220-300 (223) 6:00 Effective 2024-01-08 through 2024-02-05
Daily 17:30 Dulles, Washington (IAD) 20:34 Seattle-Tacoma (SEA)
Delta Air Lines DL 544 Non-stop Airbus A220-300 (223) 6:04 Effective 2024-02-06 through 2024-03-09
Daily 08:00 Dulles, Washington (IAD) 10:58 Seattle-Tacoma (SEA)
Delta Air Lines DL 639 Non-stop Airbus A220-300 (223) 5:58 Effective 2024-04-09 through 2024-06-06
Daily 08:00 Dulles, Washington (IAD) 10:34 Seattle-Tacoma (SEA)
Delta Air Lines DL 639 Non-stop Airbus A220-300 (223) 5:34 Effective 2024-06-07 through 2024-09-08
Daily 17:20 Dulles, Washington (IAD) 20:17 Seattle-Tacoma (SEA)
Delta Air Lines DL 952 Non-stop Airbus A220-300 (223) 5:57 Effective 2024-04-09 through 2024-06-06
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All airlines flying from Dulles, Washington (IAD) to Seattle-Tacoma (SEA).
Select flight date:
FLIGHT SCHEDULE
Direct Flights:

Effective 2024-01-09 through 2024-02-14
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 6:05, non-stop
Boeing 737 MAX 9 (7M9)

Effective 2024-02-15 through 2024-03-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:59, non-stop
Boeing 737 MAX 9 (7M9)

Effective from 2024-03-31
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:35, non-stop
Boeing 737-900 (739)

Valid until 2024-01-04
Mon
Tue
Wed
Thu
Fri
-
Sat
-
Sun
-
Duration: 6:04, non-stop
Boeing 737 MAX 8 (7M8)

Valid until 2024-01-06
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
Sun
-
Duration: 6:04, non-stop
Boeing 737-900 (739)

Effective 2024-01-07 through 2024-01-08
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 6:05, non-stop
Airbus A319 (319)

Effective from 2024-05-16
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:56, non-stop
Boeing 737 (73J)

Operates only on 2024-01-08
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 6:03, non-stop
Boeing 737 (73J)

Effective 2024-02-16 through 2024-03-13
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 6:00, non-stop
Boeing 737 (73J)

Effective from 2024-05-16
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:55, non-stop
Boeing 737 (73J)

Effective 2024-04-18 through 2024-05-13
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 5:51, non-stop
Boeing 737 (73J)

Operates only on 2024-01-09
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 6:03, non-stop
Boeing 737 (73J)

Effective 2024-01-10 through 2024-01-17
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 6:03, non-stop
Boeing 737 MAX 9 (7M9)

Effective 2024-01-18 through 2024-01-23
Mon
Tue
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 6:03, non-stop
Boeing 737 (73J)

Effective 2024-01-19 through 2024-01-28
Mon
-
Tue
-
Wed
Thu
Fri
Sat
Sun
Duration: 6:03, non-stop
Boeing 737 MAX 9 (7M9)

Effective 2024-01-29 through 2024-02-05
Mon
Tue
-
Wed
Thu
-
Fri
-
Sat
Sun
Duration: 6:03, non-stop
Boeing 737 MAX 9 (7M9)

Effective 2024-01-30 through 2024-02-01
Mon
-
Tue
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 6:03, non-stop
Boeing 737 (73J)

Operates only on 2024-02-02
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 6:03, non-stop
Boeing 737-800 (73H)

Effective 2024-02-06 through 2024-02-14
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 6:03, non-stop
Boeing 737 MAX 9 (7M9)

Effective 2024-03-14 through 2024-03-23
Mon
Tue
-
Wed
Thu
Fri
-
Sat
Sun
-
Duration: 6:00, non-stop
Boeing 737 (73J)

Effective 2024-03-15 through 2024-03-24
Mon
-
Tue
Wed
-
Thu
-
Fri
Sat
-
Sun
Duration: 6:00, non-stop
Boeing 737 MAX 9 (7M9)

Effective 2024-03-25 through 2024-04-05
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 6:00, non-stop
Boeing 737 MAX 9 (7M9)

Effective 2024-03-30 through 2024-04-13
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 6:00, non-stop
Boeing 737 (73J)

Operates only on 2024-04-07
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 6:00, non-stop
Boeing 737-800 (73H)

Effective 2024-04-08 through 2024-04-15
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 6:00, non-stop
Boeing 737 MAX 9 (7M9)

Valid until 2024-01-03
Mon
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 5:59, non-stop
Boeing 737-800 (73H)

Effective 2024-01-02 through 2024-01-07
Mon
-
Tue
Wed
-
Thu
Fri
Sat
Sun
Duration: 5:59, non-stop
Boeing 737 (73J)

Effective 2024-04-20 through 2024-05-11
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 5:51, non-stop
Boeing 737 (73J)

Effective 2024-02-15 through 2024-03-03
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 6:04, non-stop
Boeing 737 (73J)

Effective 2024-03-04 through 2024-03-11
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 6:04, non-stop
Boeing 737 MAX 9 (7M9)

Effective 2024-03-07 through 2024-03-10
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 6:04, non-stop
Boeing 737 (73J)

Effective from 2024-05-16
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:56, non-stop
Boeing 737 (73J)

Effective 2024-04-16 through 2024-05-15
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 5:51, non-stop
Boeing 737 (73J)

Effective from 2024-09-09
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:54, non-stop
Airbus A220-100 (221)

Valid until 2024-01-07
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 6:05, non-stop
Airbus A220-300 (223)

Valid until 2024-01-07
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:55, non-stop
Boeing 737 (73J)

Effective 2024-03-14 through 2024-03-17
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
Sun
Duration: 5:51, non-stop
Boeing 737 (73J)

Effective 2024-03-15 through 2024-03-21
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 5:51, non-stop
Boeing 737 MAX 9 (7M9)

Effective 2024-03-22 through 2024-04-04
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
Sun
Duration: 5:51, non-stop
Boeing 737 (73J)

Operates only on 2024-03-25
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 5:50, non-stop
Boeing 737 MAX 9 (7M9)

Effective 2024-03-26 through 2024-04-03
Mon
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 5:51, non-stop
Boeing 737 MAX 9 (7M9)

Effective 2024-04-05 through 2024-04-15
Mon
Tue
Wed
Thu
-
Fri
Sat
Sun
-
Duration: 5:51, non-stop
Boeing 737 MAX 9 (7M9)

Effective 2024-04-07 through 2024-04-14
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
Duration: 5:51, non-stop
Boeing 737 (73J)

Effective 2024-04-16 through 2024-05-15
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:40, non-stop
Boeing 737 (73J)

Effective from 2024-09-09
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:52, non-stop
Airbus A220-100 (221)

Effective 2024-01-08 through 2024-02-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 6:00, non-stop
Airbus A220-300 (223)

Effective 2024-02-06 through 2024-03-09
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 6:04, non-stop
Airbus A220-300 (223)

Effective 2024-04-09 through 2024-06-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:58, non-stop
Airbus A220-300 (223)

Effective 2024-06-07 through 2024-09-08
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:34, non-stop
Airbus A220-300 (223)

Effective 2024-04-09 through 2024-06-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:57, non-stop
Airbus A220-300 (223)
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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 5:34 and 6:06.