United Airlines flights 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
Mon 08:35 Dulles, Washington (IAD) 11:39 Seattle-Tacoma (SEA)
United Airlines UA 1035 Non-stop Boeing 737-800 (738) 6:04 Valid until 2024-01-01
Tue-Fri 08:35 Dulles, Washington (IAD) 11:40 Seattle-Tacoma (SEA)
United Airlines UA 1035 Non-stop Airbus A320 (320) 6:05 Valid until 2024-01-05
Daily 08:35 Dulles, Washington (IAD) 11:26 Seattle-Tacoma (SEA)
United Airlines UA 1964 Non-stop Boeing 737-900 (739) 5:51 Effective from 2024-05-23
Sat 17:17 Dulles, Washington (IAD) 20:17 Seattle-Tacoma (SEA)
United Airlines UA 1992 Non-stop Boeing 737 MAX 9 (7M9) 6:00 Operates only on 2024-03-09
Mon-Fri,Sun 17:28 Dulles, Washington (IAD) 20:28 Seattle-Tacoma (SEA)
United Airlines UA 1992 Non-stop Boeing 737 MAX 9 (7M9) 6:00 Effective 2024-03-07 through 2024-03-15
Daily 17:28 Dulles, Washington (IAD) 20:28 Seattle-Tacoma (SEA)
United Airlines UA 1992 Non-stop Boeing 737 MAX 9 (7M9) 6:00 Effective 2024-03-16 through 2024-03-30


United Airlines flights 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)

Valid until 2024-01-01
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 6:04, non-stop
Boeing 737-800 (738)

Valid until 2024-01-05
Mon
-
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 6:05, non-stop
Airbus A320 (320)

Effective from 2024-05-23
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:51, non-stop
Boeing 737-900 (739)

Operates only on 2024-03-09
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 6:00, non-stop
Boeing 737 MAX 9 (7M9)

Effective 2024-03-07 through 2024-03-15
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 6:00, non-stop
Boeing 737 MAX 9 (7M9)

Effective 2024-03-16 through 2024-03-30
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 6:00, non-stop
Boeing 737 MAX 9 (7M9)
  • 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 6:05.