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

Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Daily 07:35 Seattle-Tacoma (SEA) 15:43 Dulles, Washington (IAD)
Delta Air Lines DL 508 Non-stop Airbus A220-300 (223) 5:08 Effective 2025-01-06 through 2025-03-08
Daily 07:35 Seattle-Tacoma (SEA) 15:43 Dulles, Washington (IAD)
Delta Air Lines DL 508 Non-stop Airbus A220-100 (221) 5:08 Effective 2025-03-09 through 2025-04-13
Daily 07:35 Seattle-Tacoma (SEA) 15:47 Dulles, Washington (IAD)
Delta Air Lines DL 508 Non-stop Airbus A220-300 (223) 5:12 Effective 2025-04-14 through 2025-06-07
Daily 07:35 Seattle-Tacoma (SEA) 15:42 Dulles, Washington (IAD)
Delta Air Lines DL 508 Non-stop Airbus A220-300 (223) 5:07 Effective from 2025-06-08
Daily 08:05 Seattle-Tacoma (SEA) 16:11 Dulles, Washington (IAD)
Delta Air Lines DL 508 Non-stop Airbus A220-100 (221) 5:06 Effective 2024-12-03 through 2024-12-18
Daily 08:20 Seattle-Tacoma (SEA) 16:32 Dulles, Washington (IAD)
Delta Air Lines DL 508 Non-stop Airbus A220-300 (223) 5:12 Effective 2024-12-19 through 2025-01-05
Daily 08:35 Seattle-Tacoma (SEA) 16:35 Dulles, Washington (IAD)
Delta Air Lines DL 508 Non-stop Airbus A220-300 (223) 5:00 Valid until 2024-09-08
Mon-Fri,Sun 08:55 Seattle-Tacoma (SEA) 17:00 Dulles, Washington (IAD)
Delta Air Lines DL 508 Non-stop Airbus A220-300 (223) 5:05 Effective 2024-09-09 through 2024-11-10
Sat 08:55 Seattle-Tacoma (SEA) 17:03 Dulles, Washington (IAD)
Delta Air Lines DL 508 Non-stop Airbus A220-300 (223) 5:08 Effective 2024-10-12 through 2024-11-09
Daily 09:25 Seattle-Tacoma (SEA) 17:26 Dulles, Washington (IAD)
Delta Air Lines DL 508 Non-stop Airbus A220-300 (223) 5:01 Effective 2024-11-11 through 2024-12-02
Sat 11:15 Seattle-Tacoma (SEA) 19:22 Dulles, Washington (IAD)
Delta Air Lines DL 508 Non-stop Airbus A220-300 (223) 5:07 Effective 2024-09-14 through 2024-10-05
Mon-Fri,Sun 21:55 Seattle-Tacoma (SEA) 06:01 Dulles, Washington (IAD)
Delta Air Lines DL 541 Non-stop Airbus A220-300 (223) 5:06 Effective 2024-09-09 through 2024-10-06
The flight arrives 1 day after departure.
Mon-Fri,Sun 21:55 Seattle-Tacoma (SEA) 05:53 Dulles, Washington (IAD)
Delta Air Lines DL 541 Non-stop Airbus A220-300 (223) 4:58 Effective 2024-10-07 through 2024-10-30
The flight arrives 1 day after departure.
Mon,Wed-Fri,Sun 21:55 Seattle-Tacoma (SEA) 05:53 Dulles, Washington (IAD)
Delta Air Lines DL 541 Non-stop Airbus A220-300 (223) 4:58 Effective 2024-11-01 through 2024-11-10
The flight arrives 1 day after departure.
Mon-Fri,Sun 21:59 Seattle-Tacoma (SEA) 05:56 Dulles, Washington (IAD)
Delta Air Lines DL 541 Non-stop Airbus A220-300 (223) 4:57 Effective 2024-09-02 through 2024-09-08
The flight arrives 1 day after departure.
Mon-Fri,Sun 22:00 Seattle-Tacoma (SEA) 05:56 Dulles, Washington (IAD)
Delta Air Lines DL 541 Non-stop Airbus A220-300 (223) 4:56 Effective 2024-11-11 through 2024-11-22
The flight arrives 1 day after departure.
Mon-Wed,Sat,Sun 22:00 Seattle-Tacoma (SEA) 05:56 Dulles, Washington (IAD)
Delta Air Lines DL 541 Non-stop Airbus A220-300 (223) 4:56 Effective 2024-11-23 through 2024-12-02
The flight arrives 1 day after departure.
Daily 22:00 Seattle-Tacoma (SEA) 05:56 Dulles, Washington (IAD)
Delta Air Lines DL 541 Non-stop Airbus A220-100 (221) 4:56 Effective 2024-12-03 through 2024-12-18
The flight arrives 1 day after departure.
Daily 22:00 Seattle-Tacoma (SEA) 06:00 Dulles, Washington (IAD)
Delta Air Lines DL 541 Non-stop Airbus A220-100 (221) 5:00 Effective 2025-03-09 through 2025-04-13
The flight arrives 1 day after departure.
Daily 22:00 Seattle-Tacoma (SEA) 06:03 Dulles, Washington (IAD)
Delta Air Lines DL 541 Non-stop Airbus A220-300 (223) 5:03 Effective 2025-04-14 through 2025-06-07
The flight arrives 1 day after departure.
Daily 22:00 Seattle-Tacoma (SEA) 05:59 Dulles, Washington (IAD)
Delta Air Lines DL 541 Non-stop Airbus A220-300 (223) 4:59 Effective from 2025-06-08
The flight arrives 1 day after departure.




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Delta Air Lines flights from Seattle-Tacoma (SEA) to Dulles, Washington (IAD).
Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Delta Air Lines DL508
07:35
Seattle-Tacoma (SEA)

15:43
Dulles, Washington (IAD)
Effective 2025-01-06 through 2025-03-08
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:08, non-stop
Airbus A220-300 (223)
Delta Air Lines DL508
07:35
Seattle-Tacoma (SEA)

15:43
Dulles, Washington (IAD)
Effective 2025-03-09 through 2025-04-13
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:08, non-stop
Airbus A220-100 (221)
Delta Air Lines DL508
07:35
Seattle-Tacoma (SEA)

15:47
Dulles, Washington (IAD)
Effective 2025-04-14 through 2025-06-07
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:12, non-stop
Airbus A220-300 (223)
Delta Air Lines DL508
07:35
Seattle-Tacoma (SEA)

15:42
Dulles, Washington (IAD)
Effective from 2025-06-08
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:07, non-stop
Airbus A220-300 (223)
Delta Air Lines DL508
08:05
Seattle-Tacoma (SEA)

16:11
Dulles, Washington (IAD)
Effective 2024-12-03 through 2024-12-18
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:06, non-stop
Airbus A220-100 (221)
Delta Air Lines DL508
08:20
Seattle-Tacoma (SEA)

16:32
Dulles, Washington (IAD)
Effective 2024-12-19 through 2025-01-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:12, non-stop
Airbus A220-300 (223)
Delta Air Lines DL508
08:35
Seattle-Tacoma (SEA)

16:35
Dulles, Washington (IAD)
Valid until 2024-09-08
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:00, non-stop
Airbus A220-300 (223)
Delta Air Lines DL508
08:55
Seattle-Tacoma (SEA)

17:00
Dulles, Washington (IAD)
Effective 2024-09-09 through 2024-11-10
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 5:05, non-stop
Airbus A220-300 (223)
Delta Air Lines DL508
08:55
Seattle-Tacoma (SEA)

17:03
Dulles, Washington (IAD)
Effective 2024-10-12 through 2024-11-09
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 5:08, non-stop
Airbus A220-300 (223)
Delta Air Lines DL508
09:25
Seattle-Tacoma (SEA)

17:26
Dulles, Washington (IAD)
Effective 2024-11-11 through 2024-12-02
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:01, non-stop
Airbus A220-300 (223)
Delta Air Lines DL508
11:15
Seattle-Tacoma (SEA)

19:22
Dulles, Washington (IAD)
Effective 2024-09-14 through 2024-10-05
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 5:07, non-stop
Airbus A220-300 (223)
Delta Air Lines DL541
21:55
Seattle-Tacoma (SEA)

06:01(+1)
Dulles, Washington (IAD)
Effective 2024-09-09 through 2024-10-06
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 5:06, non-stop
Airbus A220-300 (223)
The flight arrives 1 day after departure.
Delta Air Lines DL541
21:55
Seattle-Tacoma (SEA)

05:53(+1)
Dulles, Washington (IAD)
Effective 2024-10-07 through 2024-10-30
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 4:58, non-stop
Airbus A220-300 (223)
The flight arrives 1 day after departure.
Delta Air Lines DL541
21:55
Seattle-Tacoma (SEA)

05:53(+1)
Dulles, Washington (IAD)
Effective 2024-11-01 through 2024-11-10
Mon
Tue
-
Wed
Thu
Fri
Sat
-
Sun
Duration: 4:58, non-stop
Airbus A220-300 (223)
The flight arrives 1 day after departure.
Delta Air Lines DL541
21:59
Seattle-Tacoma (SEA)

05:56(+1)
Dulles, Washington (IAD)
Effective 2024-09-02 through 2024-09-08
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 4:57, non-stop
Airbus A220-300 (223)
The flight arrives 1 day after departure.
Delta Air Lines DL541
22:00
Seattle-Tacoma (SEA)

05:56(+1)
Dulles, Washington (IAD)
Effective 2024-11-11 through 2024-11-22
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 4:56, non-stop
Airbus A220-300 (223)
The flight arrives 1 day after departure.
Delta Air Lines DL541
22:00
Seattle-Tacoma (SEA)

05:56(+1)
Dulles, Washington (IAD)
Effective 2024-11-23 through 2024-12-02
Mon
Tue
Wed
Thu
-
Fri
-
Sat
Sun
Duration: 4:56, non-stop
Airbus A220-300 (223)
The flight arrives 1 day after departure.
Delta Air Lines DL541
22:00
Seattle-Tacoma (SEA)

05:56(+1)
Dulles, Washington (IAD)
Effective 2024-12-03 through 2024-12-18
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 4:56, non-stop
Airbus A220-100 (221)
The flight arrives 1 day after departure.
Delta Air Lines DL541
22:00
Seattle-Tacoma (SEA)

06:00(+1)
Dulles, Washington (IAD)
Effective 2025-03-09 through 2025-04-13
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:00, non-stop
Airbus A220-100 (221)
The flight arrives 1 day after departure.
Delta Air Lines DL541
22:00
Seattle-Tacoma (SEA)

06:03(+1)
Dulles, Washington (IAD)
Effective 2025-04-14 through 2025-06-07
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:03, non-stop
Airbus A220-300 (223)
The flight arrives 1 day after departure.
Delta Air Lines DL541
22:00
Seattle-Tacoma (SEA)

05:59(+1)
Dulles, Washington (IAD)
Effective from 2025-06-08
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 4:59, non-stop
Airbus A220-300 (223)
The flight arrives 1 day after departure.
  • A domestic route departing from the Seattle-Tacoma airport (SEA) and arriving at Dulles, Washington airport (IAD).
  • The flight distance is 2299 miles, or 3699 km.
  • The timezone of the departure airport is UTC-8 , and the timezone of the arrival airport is UTC-5 . 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 4:56 and 5:12.
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