Singapore Airlines flights from Dulles, Washington (IAD) to Seattle-Tacoma (SEA).

Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Mon,Wed,Fri,Sat 17:56 Dulles, Washington (IAD) 21:00 Seattle-Tacoma (SEA)
Singapore Airlines SQ 1235 Non-stop Boeing 737 (73J) 6:04 Effective 2025-01-06 through 2025-03-07
Codeshare flight, operated by Alaska Airlines.(AS 351)
Mon,Wed,Fri,Sat 18:58 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Singapore Airlines SQ 1235 Non-stop Boeing 737 (73J) 6:02 Effective 2024-12-20 through 2025-01-04
Codeshare flight, operated by Alaska Airlines.(AS 406)
Mon,Wed,Fri,Sat 19:00 Dulles, Washington (IAD) 21:56 Seattle-Tacoma (SEA)
Singapore Airlines SQ 1235 Non-stop Boeing 737 (73J) 5:56 Effective 2025-03-19 through 2025-03-28
Codeshare flight, operated by Alaska Airlines.(AS 406)
Mon,Wed,Fri,Sat 19:06 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Singapore Airlines SQ 1235 Non-stop Boeing 737 (73J) 5:54 Effective 2024-11-22 through 2024-12-02
Codeshare flight, operated by Alaska Airlines.(AS 406)
Mon 19:12 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Singapore Airlines SQ 1235 Non-stop Boeing 737 MAX 9 (7M9) 5:48 Operates only on 2024-10-28
Codeshare flight, operated by Alaska Airlines.(AS 406)
Fri 19:12 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Singapore Airlines SQ 1235 Non-stop Boeing 737 (73J) 5:48 Effective 2024-11-01 through 2024-11-15
Codeshare flight, operated by Alaska Airlines.(AS 406)
Mon 19:12 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Singapore Airlines SQ 1235 Non-stop Boeing 737-800 (73H) 5:48 Operates only on 2024-11-04
Codeshare flight, operated by Alaska Airlines.(AS 406)
Mon 19:12 Dulles, Washington (IAD) 22:00 Seattle-Tacoma (SEA)
Singapore Airlines SQ 1235 Non-stop Boeing 737 MAX 9 (7M9) 5:48 Effective 2024-11-11 through 2024-11-18
Codeshare flight, operated by Alaska Airlines.(AS 406)


Singapore Airlines flights from Dulles, Washington (IAD) to Seattle-Tacoma (SEA).
Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:

Effective 2025-01-06 through 2025-03-07
Mon
Tue
-
Wed
Thu
-
Fri
Sat
Sun
-
Codeshare flight, operated by Alaska Airlines. (AS 351)
Duration: 6:04, non-stop
Boeing 737 (73J)

Effective 2024-12-20 through 2025-01-04
Mon
Tue
-
Wed
Thu
-
Fri
Sat
Sun
-
Codeshare flight, operated by Alaska Airlines. (AS 406)
Duration: 6:02, non-stop
Boeing 737 (73J)

Effective 2025-03-19 through 2025-03-28
Mon
Tue
-
Wed
Thu
-
Fri
Sat
Sun
-
Codeshare flight, operated by Alaska Airlines. (AS 406)
Duration: 5:56, non-stop
Boeing 737 (73J)

Effective 2024-11-22 through 2024-12-02
Mon
Tue
-
Wed
Thu
-
Fri
Sat
Sun
-
Codeshare flight, operated by Alaska Airlines. (AS 406)
Duration: 5:54, non-stop
Boeing 737 (73J)

Operates only on 2024-10-28
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Alaska Airlines. (AS 406)
Duration: 5:48, non-stop
Boeing 737 MAX 9 (7M9)

Effective 2024-11-01 through 2024-11-15
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Codeshare flight, operated by Alaska Airlines. (AS 406)
Duration: 5:48, non-stop
Boeing 737 (73J)

Operates only on 2024-11-04
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Alaska Airlines. (AS 406)
Duration: 5:48, non-stop
Boeing 737-800 (73H)

Effective 2024-11-11 through 2024-11-18
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by Alaska Airlines. (AS 406)
Duration: 5:48, 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 5:48 and 6:04.