Delta Air Lines flights from Dulles, Washington (IAD) to Seattle-Tacoma (SEA).

Select flight date:
FLIGHT SCHEDULE
Direct Flights:
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 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
Daily 17:20 Dulles, Washington (IAD) 20:07 Seattle-Tacoma (SEA)
Delta Air Lines DL 952 Non-stop Airbus A220-300 (223) 5:47 Effective 2024-06-07 through 2024-09-08
Daily 17:30 Dulles, Washington (IAD) 20:36 Seattle-Tacoma (SEA)
Delta Air Lines DL 952 Non-stop Airbus A220-300 (223) 6:06 Effective 2024-03-10 through 2024-04-08


Delta Air Lines flights from Dulles, Washington (IAD) to Seattle-Tacoma (SEA).
Select flight date:
FLIGHT SCHEDULE
Direct Flights:

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)

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)

Effective 2024-06-07 through 2024-09-08
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:47, non-stop
Airbus A220-300 (223)

Effective 2024-03-10 through 2024-04-08
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 6:06, non-stop
Airbus A220-300 (223)
  • 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.