Alaska Airlines flights from Ronald Reagan Washington (DCA) to Seattle-Tacoma (SEA).

FLIGHT SCHEDULE
Direct Flights:
Daily 08:00 Ronald Reagan Washington (DCA) 2 11:04 Seattle-Tacoma (SEA) Alaska Airlines AS 1 Non-stop Boeing 737-800 (73H) 6:04 Valid until 2026-01-06
Daily 08:00 Ronald Reagan Washington (DCA) 2 11:09 Seattle-Tacoma (SEA) Alaska Airlines AS 1 Non-stop Boeing 737-800 (73H) 6:09 Effective 2026-01-07 through 2026-02-11
Mon,Wed-Sun 08:00 Ronald Reagan Washington (DCA) 2 11:10 Seattle-Tacoma (SEA) Alaska Airlines AS 1 Non-stop Boeing 737-800 (73H) 6:10 Effective 2026-02-12 through 2026-02-23
Tue 08:00 Ronald Reagan Washington (DCA) 2 11:10 Seattle-Tacoma (SEA) Alaska Airlines AS 1 Non-stop Boeing 737 MAX 8 (7M8) 6:10 Operates only on 2026-02-17
Daily 08:00 Ronald Reagan Washington (DCA) 2 11:10 Seattle-Tacoma (SEA) Alaska Airlines AS 1 Non-stop Boeing 737-800 (73H) 6:10 Effective 2026-02-24 through 2026-03-17
Wed 08:00 Ronald Reagan Washington (DCA) 2 10:55 Seattle-Tacoma (SEA) Alaska Airlines AS 1 Non-stop Boeing 737-800 (73H) 5:55 Operates only on 2026-03-18
Daily 08:00 Ronald Reagan Washington (DCA) 2 10:58 Seattle-Tacoma (SEA) Alaska Airlines AS 1 Non-stop Boeing 737-800 (73H) 5:58 Effective 2026-03-19 through 2026-05-12
Daily 08:00 Ronald Reagan Washington (DCA) 2 10:39 Seattle-Tacoma (SEA) Alaska Airlines AS 1 Non-stop Boeing 737-800 (73H) 5:39 Effective 2026-05-13 through 2026-06-09
Daily 08:00 Ronald Reagan Washington (DCA) 2 10:58 Seattle-Tacoma (SEA) Alaska Airlines AS 1 Non-stop Boeing 737-800 (73H) 5:58 Effective from 2026-06-10
Mon,Wed-Sun 17:00 Ronald Reagan Washington (DCA) 2 20:00 Seattle-Tacoma (SEA) Alaska Airlines AS 3 Non-stop Boeing 737 MAX 8 (7M8) 6:00 Valid until 2026-01-04
Mon,Tue 17:00 Ronald Reagan Washington (DCA) 2 20:00 Seattle-Tacoma (SEA) Alaska Airlines AS 3 Non-stop Boeing 737-800 (73H) 6:00 Valid until 2026-01-05
Tue 17:00 Ronald Reagan Washington (DCA) 2 20:00 Seattle-Tacoma (SEA) Alaska Airlines AS 3 Non-stop Boeing 737 MAX 8 (7M8) 6:00 Operates only on 2026-01-06
Wed-Sun 17:00 Ronald Reagan Washington (DCA) 2 20:11 Seattle-Tacoma (SEA) Alaska Airlines AS 3 Non-stop Boeing 737-800 (73H) 6:11 Effective 2026-02-12 through 2026-02-26
Mon,Tue 17:00 Ronald Reagan Washington (DCA) 2 20:11 Seattle-Tacoma (SEA) Alaska Airlines AS 3 Non-stop Boeing 737 MAX 8 (7M8) 6:11 Effective 2026-02-16 through 2026-02-24
Mon,Tue,Fri 17:00 Ronald Reagan Washington (DCA) 2 20:11 Seattle-Tacoma (SEA) Alaska Airlines AS 3 Non-stop Boeing 737 MAX 8 (7M8) 6:11 Effective 2026-02-27 through 2026-03-06
Wed,Thu,Sat,Sun 17:00 Ronald Reagan Washington (DCA) 2 20:11 Seattle-Tacoma (SEA) Alaska Airlines AS 3 Non-stop Boeing 737-800 (73H) 6:11 Effective 2026-02-28 through 2026-03-08
Mon-Wed,Sun 17:00 Ronald Reagan Washington (DCA) 2 20:11 Seattle-Tacoma (SEA) Alaska Airlines AS 3 Non-stop Boeing 737-800 (73H) 6:11 Effective 2026-03-09 through 2026-03-17
Thu-Sat 17:00 Ronald Reagan Washington (DCA) 2 20:11 Seattle-Tacoma (SEA) Alaska Airlines AS 3 Non-stop Boeing 737 MAX 8 (7M8) 6:11 Effective 2026-03-12 through 2026-03-14
Daily 17:00 Ronald Reagan Washington (DCA) 2 19:56 Seattle-Tacoma (SEA) Alaska Airlines AS 3 Non-stop Boeing 737-800 (73H) 5:56 Effective 2026-05-13 through 2026-06-09
Daily 17:01 Ronald Reagan Washington (DCA) 2 20:07 Seattle-Tacoma (SEA) Alaska Airlines AS 3 Non-stop Boeing 737-800 (73H) 6:06 Effective 2026-01-07 through 2026-01-15
Fri 17:01 Ronald Reagan Washington (DCA) 2 20:07 Seattle-Tacoma (SEA) Alaska Airlines AS 3 Non-stop Boeing 737 MAX 8 (7M8) 6:06 Effective 2026-01-16 through 2026-01-23
Mon-Thu,Sat,Sun 17:01 Ronald Reagan Washington (DCA) 2 20:07 Seattle-Tacoma (SEA) Alaska Airlines AS 3 Non-stop Boeing 737-800 (73H) 6:06 Effective 2026-01-17 through 2026-01-29
Wed,Fri,Sat 17:01 Ronald Reagan Washington (DCA) 2 20:07 Seattle-Tacoma (SEA) Alaska Airlines AS 3 Non-stop Boeing 737-800 (73H) 6:06 Effective 2026-01-30 through 2026-02-04
Mon,Tue,Thu,Fri,Sun 17:01 Ronald Reagan Washington (DCA) 2 20:07 Seattle-Tacoma (SEA) Alaska Airlines AS 3 Non-stop Boeing 737 MAX 8 (7M8) 6:06 Effective 2026-02-01 through 2026-02-06
Mon-Wed,Sat,Sun 17:01 Ronald Reagan Washington (DCA) 2 20:07 Seattle-Tacoma (SEA) Alaska Airlines AS 3 Non-stop Boeing 737-800 (73H) 6:06 Effective 2026-02-07 through 2026-02-11
Wed 17:02 Ronald Reagan Washington (DCA) 2 20:02 Seattle-Tacoma (SEA) Alaska Airlines AS 3 Non-stop Boeing 737-800 (73H) 6:00 Operates only on 2026-06-10
Daily 17:04 Ronald Reagan Washington (DCA) 2 20:04 Seattle-Tacoma (SEA) Alaska Airlines AS 3 Non-stop Boeing 737-800 (73H) 6:00 Effective from 2026-06-11
Wed 17:30 Ronald Reagan Washington (DCA) 2 20:25 Seattle-Tacoma (SEA) Alaska Airlines AS 3 Non-stop Boeing 737-800 (73H) 5:55 Operates only on 2026-03-18
Daily 17:30 Ronald Reagan Washington (DCA) 2 20:32 Seattle-Tacoma (SEA) Alaska Airlines AS 3 Non-stop Boeing 737-800 (73H) 6:02 Effective 2026-03-19 through 2026-05-12

A domestic route departing from the Ronald Reagan Washington airport (DCA) and arriving at Seattle-Tacoma airport (SEA).
The flight distance is 2321 miles, or 3736 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 5:39 and 6:11.

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FLIGHT SCHEDULE

Direct Flights:

Alaska Airlines AS1

08:00

Ronald Reagan Washington (DCA) 2

11:04

Seattle-Tacoma (SEA)

Valid until 2026-01-06

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 6:04, non-stop
Boeing 737-800 (73H)

Direct Flights:

Alaska Airlines AS1

08:00

Ronald Reagan Washington (DCA) 2

11:09

Seattle-Tacoma (SEA)

Effective 2026-01-07 through 2026-02-11

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 6:09, non-stop
Boeing 737-800 (73H)

Direct Flights:

Alaska Airlines AS1

08:00

Ronald Reagan Washington (DCA) 2

11:10

Seattle-Tacoma (SEA)

Effective 2026-02-12 through 2026-02-23

Mon

Tue
-

Wed

Thu

Fri

Sat

Sun

Duration: 6:10, non-stop
Boeing 737-800 (73H)

Direct Flights:

Alaska Airlines AS1

08:00

Ronald Reagan Washington (DCA) 2

11:10

Seattle-Tacoma (SEA)

Operates only on 2026-02-17

Mon
-

Tue

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 6:10, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Alaska Airlines AS1

08:00

Ronald Reagan Washington (DCA) 2

11:10

Seattle-Tacoma (SEA)

Effective 2026-02-24 through 2026-03-17

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 6:10, non-stop
Boeing 737-800 (73H)

Direct Flights:

Alaska Airlines AS1

08:00

Ronald Reagan Washington (DCA) 2

10:55

Seattle-Tacoma (SEA)

Operates only on 2026-03-18

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 5:55, non-stop
Boeing 737-800 (73H)

Direct Flights:

Alaska Airlines AS1

08:00

Ronald Reagan Washington (DCA) 2

10:58

Seattle-Tacoma (SEA)

Effective 2026-03-19 through 2026-05-12

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 5:58, non-stop
Boeing 737-800 (73H)

Direct Flights:

Alaska Airlines AS1

08:00

Ronald Reagan Washington (DCA) 2

10:39

Seattle-Tacoma (SEA)

Effective 2026-05-13 through 2026-06-09

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 5:39, non-stop
Boeing 737-800 (73H)

Direct Flights:

Alaska Airlines AS1

08:00

Ronald Reagan Washington (DCA) 2

10:58

Seattle-Tacoma (SEA)

Effective from 2026-06-10

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 5:58, non-stop
Boeing 737-800 (73H)

Direct Flights:

Alaska Airlines AS3

17:00

Ronald Reagan Washington (DCA) 2

20:00

Seattle-Tacoma (SEA)

Valid until 2026-01-04

Mon

Tue
-

Wed

Thu

Fri

Sat

Sun

Duration: 6:00, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Alaska Airlines AS3

17:00

Ronald Reagan Washington (DCA) 2

20:00

Seattle-Tacoma (SEA)

Valid until 2026-01-05

Mon

Tue

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 6:00, non-stop
Boeing 737-800 (73H)

Direct Flights:

Alaska Airlines AS3

17:00

Ronald Reagan Washington (DCA) 2

20:00

Seattle-Tacoma (SEA)

Operates only on 2026-01-06

Mon
-

Tue

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 6:00, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Alaska Airlines AS3

17:00

Ronald Reagan Washington (DCA) 2

20:11

Seattle-Tacoma (SEA)

Effective 2026-02-12 through 2026-02-26

Mon
-

Tue
-

Wed

Thu

Fri

Sat

Sun

Duration: 6:11, non-stop
Boeing 737-800 (73H)

Direct Flights:

Alaska Airlines AS3

17:00

Ronald Reagan Washington (DCA) 2

20:11

Seattle-Tacoma (SEA)

Effective 2026-02-16 through 2026-02-24

Mon

Tue

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 6:11, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Alaska Airlines AS3

17:00

Ronald Reagan Washington (DCA) 2

20:11

Seattle-Tacoma (SEA)

Effective 2026-02-27 through 2026-03-06

Mon

Tue

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Duration: 6:11, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Alaska Airlines AS3

17:00

Ronald Reagan Washington (DCA) 2

20:11

Seattle-Tacoma (SEA)

Effective 2026-02-28 through 2026-03-08

Mon
-

Tue
-

Wed

Thu

Fri
-

Sat

Sun

Duration: 6:11, non-stop
Boeing 737-800 (73H)

Direct Flights:

Alaska Airlines AS3

17:00

Ronald Reagan Washington (DCA) 2

20:11

Seattle-Tacoma (SEA)

Effective 2026-03-09 through 2026-03-17

Mon

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun

Duration: 6:11, non-stop
Boeing 737-800 (73H)

Direct Flights:

Alaska Airlines AS3

17:00

Ronald Reagan Washington (DCA) 2

20:11

Seattle-Tacoma (SEA)

Effective 2026-03-12 through 2026-03-14

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat

Sun
-

Duration: 6:11, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Alaska Airlines AS3

17:00

Ronald Reagan Washington (DCA) 2

19:56

Seattle-Tacoma (SEA)

Effective 2026-05-13 through 2026-06-09

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 5:56, non-stop
Boeing 737-800 (73H)

Direct Flights:

Alaska Airlines AS3

17:01

Ronald Reagan Washington (DCA) 2

20:07

Seattle-Tacoma (SEA)

Effective 2026-01-07 through 2026-01-15

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 6:06, non-stop
Boeing 737-800 (73H)

Direct Flights:

Alaska Airlines AS3

17:01

Ronald Reagan Washington (DCA) 2

20:07

Seattle-Tacoma (SEA)

Effective 2026-01-16 through 2026-01-23

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Duration: 6:06, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Alaska Airlines AS3

17:01

Ronald Reagan Washington (DCA) 2

20:07

Seattle-Tacoma (SEA)

Effective 2026-01-17 through 2026-01-29

Mon

Tue

Wed

Thu

Fri
-

Sat

Sun

Duration: 6:06, non-stop
Boeing 737-800 (73H)

Direct Flights:

Alaska Airlines AS3

17:01

Ronald Reagan Washington (DCA) 2

20:07

Seattle-Tacoma (SEA)

Effective 2026-01-30 through 2026-02-04

Mon
-

Tue
-

Wed

Thu
-

Fri

Sat

Sun
-

Duration: 6:06, non-stop
Boeing 737-800 (73H)

Direct Flights:

Alaska Airlines AS3

17:01

Ronald Reagan Washington (DCA) 2

20:07

Seattle-Tacoma (SEA)

Effective 2026-02-01 through 2026-02-06

Mon

Tue

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 6:06, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Alaska Airlines AS3

17:01

Ronald Reagan Washington (DCA) 2

20:07

Seattle-Tacoma (SEA)

Effective 2026-02-07 through 2026-02-11

Mon

Tue

Wed

Thu
-

Fri
-

Sat

Sun

Duration: 6:06, non-stop
Boeing 737-800 (73H)

Direct Flights:

Alaska Airlines AS3

17:02

Ronald Reagan Washington (DCA) 2

20:02

Seattle-Tacoma (SEA)

Operates only on 2026-06-10

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 6:00, non-stop
Boeing 737-800 (73H)

Direct Flights:

Alaska Airlines AS3

17:04

Ronald Reagan Washington (DCA) 2

20:04

Seattle-Tacoma (SEA)

Effective from 2026-06-11

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 6:00, non-stop
Boeing 737-800 (73H)

Direct Flights:

Alaska Airlines AS3

17:30

Ronald Reagan Washington (DCA) 2

20:25

Seattle-Tacoma (SEA)

Operates only on 2026-03-18

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 5:55, non-stop
Boeing 737-800 (73H)

Direct Flights:

Alaska Airlines AS3

17:30

Ronald Reagan Washington (DCA) 2

20:32

Seattle-Tacoma (SEA)

Effective 2026-03-19 through 2026-05-12

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 6:02, non-stop
Boeing 737-800 (73H)

A domestic route departing from the Ronald Reagan Washington airport (DCA) and arriving at Seattle-Tacoma airport (SEA).
The flight distance is 2321 miles, or 3736 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 5:39 and 6:11.

All DCA-SEA flights

All Alaska Airlines flights

Return (SEA-DCA) flights

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