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

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Daily 07:00 Washington Dulles (IAD) 10:01 Seattle-Tacoma (SEA)
Delta Air Lines DL 1015 Non-stop Airbus A220-300 (223) 6:01 Effective 2026-03-08 through 2026-03-14
Daily 07:00 Washington Dulles (IAD) 10:03 Seattle-Tacoma (SEA)
Delta Air Lines DL 1015 Non-stop Airbus A220-300 (223) 6:03 Effective 2026-03-15 through 2026-04-12
Daily 07:05 Washington Dulles (IAD) 10:05 Seattle-Tacoma (SEA)
Delta Air Lines DL 1015 Non-stop Airbus A220-300 (223) 6:00 Effective from 2026-10-06
Daily 07:10 Washington Dulles (IAD) 10:03 Seattle-Tacoma (SEA)
Delta Air Lines DL 1015 Non-stop Airbus A220-300 (223) 5:53 Effective 2026-04-13 through 2026-10-05
Daily 07:30 Washington Dulles (IAD) 10:29 Seattle-Tacoma (SEA)
Delta Air Lines DL 1015 Non-stop Airbus A220-300 (223) 5:59 Effective 2026-01-05 through 2026-03-07
Mon,Tue,Fri-Sun 07:05 Washington Dulles (IAD) 10:02 Seattle-Tacoma (SEA)
Delta Air Lines DL 1084 Non-stop Airbus A220-300 (223) 5:57 Valid until 2026-01-04
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Parallax here IAD-SEA


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

Effective 2026-03-08 through 2026-03-14
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 6:01, non-stop
Airbus A220-300 (223)

Direct Flights:

Effective 2026-03-15 through 2026-04-12
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 6:03, non-stop
Airbus A220-300 (223)

Direct Flights:

Effective from 2026-10-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 6:00, non-stop
Airbus A220-300 (223)

Direct Flights:

Effective 2026-04-13 through 2026-10-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:53, non-stop
Airbus A220-300 (223)

Direct Flights:

Effective 2026-01-05 through 2026-03-07
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:59, non-stop
Airbus A220-300 (223)

Direct Flights:

Valid until 2026-01-04
Mon
Tue
Wed
-
Thu
-
Fri
Sat
Sun
Duration: 5:57, non-stop
Airbus A220-300 (223)
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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 5:53 and 6:03.