Alaska Airlines flight AS 4: Seattle-Tacoma - Ronald Reagan Washington

Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Daily 08:00 Seattle-Tacoma (SEA) 16:05 Ronald Reagan Washington (DCA) 2
AS 4 Non-stop Boeing 737-800 (73H) 5:05 Valid until 2026-01-06
Daily 08:00 Seattle-Tacoma (SEA) 16:09 Ronald Reagan Washington (DCA) 2
AS 4 Non-stop Boeing 737-800 (73H) 5:09 Effective 2026-01-07 through 2026-02-11
Daily 08:00 Seattle-Tacoma (SEA) 16:06 Ronald Reagan Washington (DCA) 2
AS 4 Non-stop Boeing 737-800 (73H) 5:06 Effective 2026-02-12 through 2026-03-12
Fri 08:00 Seattle-Tacoma (SEA) 16:06 Ronald Reagan Washington (DCA) 2
AS 4 Non-stop Boeing 737 MAX 8 (7M8) 5:06 Operates only on 2026-03-13
Mon,Tue,Sat,Sun 08:00 Seattle-Tacoma (SEA) 16:06 Ronald Reagan Washington (DCA) 2
AS 4 Non-stop Boeing 737-800 (73H) 5:06 Effective 2026-03-14 through 2026-03-17
Wed 08:00 Seattle-Tacoma (SEA) 16:15 Ronald Reagan Washington (DCA) 2
AS 4 Non-stop Boeing 737-800 (73H) 5:15 Operates only on 2026-03-18
Daily 08:00 Seattle-Tacoma (SEA) 16:17 Ronald Reagan Washington (DCA) 2
AS 4 Non-stop Boeing 737-800 (73H) 5:17 Effective 2026-03-19 through 2026-05-12
Daily 08:00 Seattle-Tacoma (SEA) 16:14 Ronald Reagan Washington (DCA) 2
AS 4 Non-stop Boeing 737-800 (73H) 5:14 Effective 2026-05-13 through 2026-06-10
Daily 08:00 Seattle-Tacoma (SEA) 16:08 Ronald Reagan Washington (DCA) 2
AS 4 Non-stop Boeing 737-800 (73H) 5:08 Effective from 2026-06-11


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Alaska Airlines flight AS 4:
Seattle-Tacoma - Ronald Reagan Washington
Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Alaska Airlines AS4
08:00
Seattle-Tacoma (SEA)

16:05
Ronald Reagan Washington (DCA) 2
Valid until 2026-01-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:05, non-stop
Boeing 737-800 (73H)
Direct Flights:
Alaska Airlines AS4
08:00
Seattle-Tacoma (SEA)

16:09
Ronald Reagan Washington (DCA) 2
Effective 2026-01-07 through 2026-02-11
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:09, non-stop
Boeing 737-800 (73H)
Direct Flights:
Alaska Airlines AS4
08:00
Seattle-Tacoma (SEA)

16:06
Ronald Reagan Washington (DCA) 2
Effective 2026-02-12 through 2026-03-12
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:06, non-stop
Boeing 737-800 (73H)
Direct Flights:
Alaska Airlines AS4
08:00
Seattle-Tacoma (SEA)

16:06
Ronald Reagan Washington (DCA) 2
Operates only on 2026-03-13
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 5:06, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Alaska Airlines AS4
08:00
Seattle-Tacoma (SEA)

16:06
Ronald Reagan Washington (DCA) 2
Effective 2026-03-14 through 2026-03-17
Mon
Tue
Wed
-
Thu
-
Fri
-
Sat
Sun
Duration: 5:06, non-stop
Boeing 737-800 (73H)
Direct Flights:
Alaska Airlines AS4
08:00
Seattle-Tacoma (SEA)

16:15
Ronald Reagan Washington (DCA) 2
Operates only on 2026-03-18
Mon
-
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 5:15, non-stop
Boeing 737-800 (73H)
Direct Flights:
Alaska Airlines AS4
08:00
Seattle-Tacoma (SEA)

16:17
Ronald Reagan Washington (DCA) 2
Effective 2026-03-19 through 2026-05-12
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:17, non-stop
Boeing 737-800 (73H)
Direct Flights:
Alaska Airlines AS4
08:00
Seattle-Tacoma (SEA)

16:14
Ronald Reagan Washington (DCA) 2
Effective 2026-05-13 through 2026-06-10
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:14, non-stop
Boeing 737-800 (73H)
Direct Flights:
Alaska Airlines AS4
08:00
Seattle-Tacoma (SEA)

16:08
Ronald Reagan Washington (DCA) 2
Effective from 2026-06-11
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:08, non-stop
Boeing 737-800 (73H)
  • AS 4 is a domestic flight departing from the Seattle-Tacoma airport (SEA) and arriving at Ronald Reagan Washington airport (DCA).
  • The flight distance is 2321 miles, or 3736 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 5:05 and 5:17.
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