Southwest Airlines flights from Denver (DEN) to Seattle-Tacoma (SEA).

FLIGHT SCHEDULE
Direct Flights:
Tue,Wed 08:05 Denver (DEN) 10:05 Seattle-Tacoma (SEA) Southwest Airlines WN 1713 Non-stop Boeing 737 MAX 8 (7M8) 3:00 Effective 2026-06-09 through 2026-07-29
Sat 18:00 Denver (DEN) 20:10 Seattle-Tacoma (SEA) Southwest Airlines WN 1716 Non-stop Boeing 737-800 (73H) 3:10 Effective 2026-06-06 through 2026-08-01
Tue,Wed 18:15 Denver (DEN) 20:25 Seattle-Tacoma (SEA) Southwest Airlines WN 1716 Non-stop Boeing 737-700 (Scimitar Winglets) 3:10 Effective 2026-06-09 through 2026-07-29
Mon,Thu,Fri 19:50 Denver (DEN) 21:50 Seattle-Tacoma (SEA) Southwest Airlines WN 1716 Non-stop Boeing 737-800 (73H) 3:00 Effective 2026-06-04 through 2026-08-03
Tue,Wed 08:35 Denver (DEN) 10:35 Seattle-Tacoma (SEA) Southwest Airlines WN 1738 Non-stop Boeing 737-800 (73H) 3:00 Effective 2026-03-10 through 2026-04-01
Sat 08:00 Denver (DEN) 10:05 Seattle-Tacoma (SEA) Southwest Airlines WN 1780 Non-stop Boeing 737-800 (73H) 3:05 Effective 2026-06-06 through 2026-08-01
Mon,Thu,Fri 17:05 Denver (DEN) 19:05 Seattle-Tacoma (SEA) Southwest Airlines WN 1801 Non-stop Boeing 737-800 (73H) 3:00 Effective 2026-04-09 through 2026-06-01
Tue,Wed 09:15 Denver (DEN) 11:10 Seattle-Tacoma (SEA) Southwest Airlines WN 2014 Non-stop Boeing 737 MAX 8 (7M8) 2:55 Effective 2026-08-04 through 2026-09-30
Tue,Wed 15:00 Denver (DEN) 16:55 Seattle-Tacoma (SEA) Southwest Airlines WN 2068 Non-stop Boeing 737-800 (73H) 2:55 Effective 2026-04-07 through 2026-06-03
Sat 20:10 Denver (DEN) 22:10 Seattle-Tacoma (SEA) Southwest Airlines WN 2068 Non-stop Boeing 737-800 (73H) 3:00 Effective 2026-04-11 through 2026-05-30
Sun 20:40 Denver (DEN) 22:40 Seattle-Tacoma (SEA) Southwest Airlines WN 2068 Non-stop Boeing 737 MAX 8 (7M8) 3:00 Operates only on 2026-05-24
Sun 21:00 Denver (DEN) 23:00 Seattle-Tacoma (SEA) Southwest Airlines WN 2068 Non-stop Boeing 737-700 (Scimitar Winglets) 3:00 Effective 2026-04-12 through 2026-05-17
Sun 21:00 Denver (DEN) 23:00 Seattle-Tacoma (SEA) Southwest Airlines WN 2068 Non-stop Boeing 737-700 (Scimitar Winglets) 3:00 Operates only on 2026-05-31
Mon,Thu,Fri 21:35 Denver (DEN) 23:30 Seattle-Tacoma (SEA) Southwest Airlines WN 2068 Non-stop Boeing 737-700 (Scimitar Winglets) 2:55 Effective 2026-04-09 through 2026-06-01
Sun 12:45 Denver (DEN) 14:40 Seattle-Tacoma (SEA) Southwest Airlines WN 2595 Non-stop Boeing 737 MAX 8 (7M8) 2:55 Effective 2026-04-12 through 2026-05-17
Sun 12:45 Denver (DEN) 14:40 Seattle-Tacoma (SEA) Southwest Airlines WN 2595 Non-stop Boeing 737 MAX 8 (7M8) 2:55 Operates only on 2026-05-31
Sun 13:25 Denver (DEN) 15:20 Seattle-Tacoma (SEA) Southwest Airlines WN 2595 Non-stop Boeing 737 MAX 8 (7M8) 2:55 Operates only on 2026-05-24
Mon,Tue,Fri,Sun 17:15 Denver (DEN) 19:15 Seattle-Tacoma (SEA) Southwest Airlines WN 2626 Non-stop Boeing 737 MAX 8 (7M8) 3:00 Valid until 2026-01-04
Sat 19:10 Denver (DEN) 21:10 Seattle-Tacoma (SEA) Southwest Airlines WN 2626 Non-stop Boeing 737 MAX 8 (7M8) 3:00 Valid until 2026-01-03
Wed,Thu 08:10 Denver (DEN) 10:15 Seattle-Tacoma (SEA) Southwest Airlines WN 2628 Non-stop Boeing 737-700 (73W) 3:05 Valid until 2026-01-01
Mon,Tue,Fri,Sun 22:35 Denver (DEN) 00:35 Seattle-Tacoma (SEA) Southwest Airlines WN 2628 Non-stop Boeing 737 MAX 8 (7M8) 3:00 Valid until 2026-01-05 The flight arrives 1 day after departure.
Sat 22:45 Denver (DEN) 00:50 Seattle-Tacoma (SEA) Southwest Airlines WN 2628 Non-stop Boeing 737 MAX 8 (7M8) 3:05 Valid until 2026-01-03 The flight arrives 1 day after departure.
Wed,Thu 20:55 Denver (DEN) 22:55 Seattle-Tacoma (SEA) Southwest Airlines WN 2919 Non-stop Boeing 737 MAX 8 (7M8) 3:00 Valid until 2026-01-01
Mon-Fri 10:05 Denver (DEN) 12:05 Seattle-Tacoma (SEA) Southwest Airlines WN 3051 Non-stop Boeing 737 MAX 8 (7M8) 3:00 Effective 2026-06-04 through 2026-08-03
Sun 12:35 Denver (DEN) 14:25 Seattle-Tacoma (SEA) Southwest Airlines WN 3051 Non-stop Boeing 737-800 (73H) 2:50 Effective 2026-06-07 through 2026-08-02
Tue,Wed 16:25 Denver (DEN) 18:20 Seattle-Tacoma (SEA) Southwest Airlines WN 3063 Non-stop Boeing 737-700 (Scimitar Winglets) 2:55 Effective 2026-03-10 through 2026-04-01
Mon,Thu,Fri,Sun 17:20 Denver (DEN) 19:15 Seattle-Tacoma (SEA) Southwest Airlines WN 3063 Non-stop Boeing 737 MAX 8 (7M8) 2:55 Effective 2026-03-05 through 2026-04-06
Wed,Thu 16:40 Denver (DEN) 18:40 Seattle-Tacoma (SEA) Southwest Airlines WN 3308 Non-stop Boeing 737-800 (73H) 3:00 Valid until 2026-01-01
Mon 18:30 Denver (DEN) 20:35 Seattle-Tacoma (SEA) Southwest Airlines WN 3308 Non-stop Boeing 737-800 (73H) 3:05 Operates only on 2026-01-05
Mon,Thu-Sun 08:30 Denver (DEN) 10:25 Seattle-Tacoma (SEA) Southwest Airlines WN 3398 Non-stop Boeing 737 MAX 8 (7M8) 2:55 Effective 2026-04-09 through 2026-05-23
Mon,Thu-Sun 08:30 Denver (DEN) 10:25 Seattle-Tacoma (SEA) Southwest Airlines WN 3398 Non-stop Boeing 737 MAX 8 (7M8) 2:55 Effective 2026-05-25 through 2026-06-01
Sun 08:45 Denver (DEN) 10:40 Seattle-Tacoma (SEA) Southwest Airlines WN 3398 Non-stop Boeing 737-800 (73H) 2:55 Operates only on 2026-05-24
Sat 16:35 Denver (DEN) 18:35 Seattle-Tacoma (SEA) Southwest Airlines WN 3493 Non-stop Boeing 737 MAX 8 (7M8) 3:00 Effective 2026-02-14 through 2026-02-28
Thu,Fri,Sun 16:40 Denver (DEN) 18:40 Seattle-Tacoma (SEA) Southwest Airlines WN 3493 Non-stop Boeing 737-800 (73H) 3:00 Effective 2026-01-11 through 2026-01-16
Mon,Sun 16:40 Denver (DEN) 18:40 Seattle-Tacoma (SEA) Southwest Airlines WN 3493 Non-stop Boeing 737-800 (73H) 3:00 Effective 2026-01-19 through 2026-01-25
Thu,Fri,Sun 16:40 Denver (DEN) 18:40 Seattle-Tacoma (SEA) Southwest Airlines WN 3493 Non-stop Boeing 737-800 (73H) 3:00 Effective 2026-02-01 through 2026-02-06
Mon,Sun 16:40 Denver (DEN) 18:40 Seattle-Tacoma (SEA) Southwest Airlines WN 3493 Non-stop Boeing 737-800 (73H) 3:00 Effective 2026-02-09 through 2026-02-15
Mon,Tue,Thu 16:40 Denver (DEN) 18:40 Seattle-Tacoma (SEA) Southwest Airlines WN 3493 Non-stop Boeing 737-800 (73H) 3:00 Effective 2026-02-17 through 2026-02-23
Mon 16:40 Denver (DEN) 18:40 Seattle-Tacoma (SEA) Southwest Airlines WN 3493 Non-stop Boeing 737-800 (73H) 3:00 Operates only on 2026-03-02
Mon,Thu,Fri,Sun 21:10 Denver (DEN) 23:05 Seattle-Tacoma (SEA) Southwest Airlines WN 3856 Non-stop Boeing 737-800 (73H) 2:55 Effective 2026-06-04 through 2026-08-03
Tue,Wed 21:35 Denver (DEN) 23:30 Seattle-Tacoma (SEA) Southwest Airlines WN 3856 Non-stop Boeing 737-800 (73H) 2:55 Effective 2026-06-09 through 2026-07-29
Sat 22:20 Denver (DEN) 00:10 Seattle-Tacoma (SEA) Southwest Airlines WN 3856 Non-stop Boeing 737-700 (Scimitar Winglets) 2:50 Effective 2026-06-06 through 2026-08-01 The flight arrives 1 day after departure.
Sun 15:45 Denver (DEN) 17:45 Seattle-Tacoma (SEA) Southwest Airlines WN 4030 Non-stop Boeing 737 MAX 8 (7M8) 3:00 Effective 2026-06-07 through 2026-08-02
Sat 11:20 Denver (DEN) 13:15 Seattle-Tacoma (SEA) Southwest Airlines WN 4130 Non-stop Boeing 737-800 (73H) 2:55 Effective 2026-06-06 through 2026-08-01
Mon,Thu,Fri 12:30 Denver (DEN) 14:25 Seattle-Tacoma (SEA) Southwest Airlines WN 4130 Non-stop Boeing 737 MAX 8 (7M8) 2:55 Effective 2026-06-04 through 2026-08-03
Tue,Wed 12:55 Denver (DEN) 14:45 Seattle-Tacoma (SEA) Southwest Airlines WN 4130 Non-stop Boeing 737 MAX 8 (7M8) 2:50 Effective 2026-06-09 through 2026-07-29
Tue,Wed 09:00 Denver (DEN) 10:55 Seattle-Tacoma (SEA) Southwest Airlines WN 4204 Non-stop Boeing 737 MAX 8 (7M8) 2:55 Effective 2026-04-07 through 2026-06-03
Sun 16:00 Denver (DEN) 18:00 Seattle-Tacoma (SEA) Southwest Airlines WN 4204 Non-stop Boeing 737 MAX 8 (7M8) 3:00 Operates only on 2026-05-24
Sat 16:15 Denver (DEN) 18:15 Seattle-Tacoma (SEA) Southwest Airlines WN 4204 Non-stop Boeing 737 MAX 8 (7M8) 3:00 Effective 2026-04-11 through 2026-05-30
Sun 18:00 Denver (DEN) 20:10 Seattle-Tacoma (SEA) Southwest Airlines WN 4204 Non-stop Boeing 737 MAX 8 (7M8) 3:10 Effective 2026-04-12 through 2026-05-17

1 2 3

A domestic route departing from the Denver airport (DEN) and arriving at Seattle-Tacoma airport (SEA).
The flight distance is 1022 miles, or 1644 km.
The timezone of the departure airport is UTC-7 , 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 2:50 and 3:15.

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Southwest Airlines flights from Denver (DEN) to Seattle-Tacoma (SEA).

FLIGHT SCHEDULE

Direct Flights:

Southwest Airlines WN1713

08:05

Denver (DEN)

10:05

Seattle-Tacoma (SEA)

Effective 2026-06-09 through 2026-07-29

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:00, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1716

18:00

Denver (DEN)

20:10

Seattle-Tacoma (SEA)

Effective 2026-06-06 through 2026-08-01

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:10, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN1716

18:15

Denver (DEN)

20:25

Seattle-Tacoma (SEA)

Effective 2026-06-09 through 2026-07-29

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:10, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN1716

19:50

Denver (DEN)

21:50

Seattle-Tacoma (SEA)

Effective 2026-06-04 through 2026-08-03

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 3:00, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN1738

08:35

Denver (DEN)

10:35

Seattle-Tacoma (SEA)

Effective 2026-03-10 through 2026-04-01

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:00, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN1780

08:00

Denver (DEN)

10:05

Seattle-Tacoma (SEA)

Effective 2026-06-06 through 2026-08-01

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:05, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN1801

17:05

Denver (DEN)

19:05

Seattle-Tacoma (SEA)

Effective 2026-04-09 through 2026-06-01

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 3:00, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN2014

09:15

Denver (DEN)

11:10

Seattle-Tacoma (SEA)

Effective 2026-08-04 through 2026-09-30

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:55, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2068

15:00

Denver (DEN)

16:55

Seattle-Tacoma (SEA)

Effective 2026-04-07 through 2026-06-03

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:55, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN2068

20:10

Denver (DEN)

22:10

Seattle-Tacoma (SEA)

Effective 2026-04-11 through 2026-05-30

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:00, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN2068

20:40

Denver (DEN)

22:40

Seattle-Tacoma (SEA)

Operates only on 2026-05-24

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:00, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2068

21:00

Denver (DEN)

23:00

Seattle-Tacoma (SEA)

Effective 2026-04-12 through 2026-05-17

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:00, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN2068

21:00

Denver (DEN)

23:00

Seattle-Tacoma (SEA)

Operates only on 2026-05-31

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:00, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN2068

21:35

Denver (DEN)

23:30

Seattle-Tacoma (SEA)

Effective 2026-04-09 through 2026-06-01

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 2:55, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN2595

12:45

Denver (DEN)

14:40

Seattle-Tacoma (SEA)

Effective 2026-04-12 through 2026-05-17

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:55, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2595

12:45

Denver (DEN)

14:40

Seattle-Tacoma (SEA)

Operates only on 2026-05-31

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:55, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2595

13:25

Denver (DEN)

15:20

Seattle-Tacoma (SEA)

Operates only on 2026-05-24

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:55, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2626

17:15

Denver (DEN)

19:15

Seattle-Tacoma (SEA)

Valid until 2026-01-04

Mon

Tue

Wed
-

Thu
-

Fri

Sat
-

Sun

Duration: 3:00, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2626

19:10

Denver (DEN)

21:10

Seattle-Tacoma (SEA)

Valid until 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:00, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2628

08:10

Denver (DEN)

10:15

Seattle-Tacoma (SEA)

Valid until 2026-01-01

Mon
-

Tue
-

Wed

Thu

Fri
-

Sat
-

Sun
-

Duration: 3:05, non-stop
Boeing 737-700 (73W)

Direct Flights:

Southwest Airlines WN2628

22:35

Denver (DEN)

00:35(+1)

Seattle-Tacoma (SEA)

Valid until 2026-01-05

Mon

Tue

Wed
-

Thu
-

Fri

Sat
-

Sun

Duration: 3:00, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.

Direct Flights:

Southwest Airlines WN2628

22:45

Denver (DEN)

00:50(+1)

Seattle-Tacoma (SEA)

Valid until 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:05, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.

Direct Flights:

Southwest Airlines WN2919

20:55

Denver (DEN)

22:55

Seattle-Tacoma (SEA)

Valid until 2026-01-01

Mon
-

Tue
-

Wed

Thu

Fri
-

Sat
-

Sun
-

Duration: 3:00, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3051

10:05

Denver (DEN)

12:05

Seattle-Tacoma (SEA)

Effective 2026-06-04 through 2026-08-03

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

Duration: 3:00, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3051

12:35

Denver (DEN)

14:25

Seattle-Tacoma (SEA)

Effective 2026-06-07 through 2026-08-02

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:50, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3063

16:25

Denver (DEN)

18:20

Seattle-Tacoma (SEA)

Effective 2026-03-10 through 2026-04-01

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:55, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN3063

17:20

Denver (DEN)

19:15

Seattle-Tacoma (SEA)

Effective 2026-03-05 through 2026-04-06

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 2:55, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3308

16:40

Denver (DEN)

18:40

Seattle-Tacoma (SEA)

Valid until 2026-01-01

Mon
-

Tue
-

Wed

Thu

Fri
-

Sat
-

Sun
-

Duration: 3:00, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3308

18:30

Denver (DEN)

20:35

Seattle-Tacoma (SEA)

Operates only on 2026-01-05

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:05, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3398

08:30

Denver (DEN)

10:25

Seattle-Tacoma (SEA)

Effective 2026-04-09 through 2026-05-23

Mon

Tue
-

Wed
-

Thu

Fri

Sat

Sun

Duration: 2:55, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3398

08:30

Denver (DEN)

10:25

Seattle-Tacoma (SEA)

Effective 2026-05-25 through 2026-06-01

Mon

Tue
-

Wed
-

Thu

Fri

Sat

Sun

Duration: 2:55, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3398

08:45

Denver (DEN)

10:40

Seattle-Tacoma (SEA)

Operates only on 2026-05-24

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:55, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3493

16:35

Denver (DEN)

18:35

Seattle-Tacoma (SEA)

Effective 2026-02-14 through 2026-02-28

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:00, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN3493

16:40

Denver (DEN)

18:40

Seattle-Tacoma (SEA)

Effective 2026-01-11 through 2026-01-16

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 3:00, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3493

16:40

Denver (DEN)

18:40

Seattle-Tacoma (SEA)

Effective 2026-01-19 through 2026-01-25

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:00, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3493

16:40

Denver (DEN)

18:40

Seattle-Tacoma (SEA)

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

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 3:00, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3493

16:40

Denver (DEN)

18:40

Seattle-Tacoma (SEA)

Effective 2026-02-09 through 2026-02-15

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:00, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3493

16:40

Denver (DEN)

18:40

Seattle-Tacoma (SEA)

Effective 2026-02-17 through 2026-02-23

Mon

Tue

Wed
-

Thu

Fri
-

Sat
-

Sun
-

Duration: 3:00, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3493

16:40

Denver (DEN)

18:40

Seattle-Tacoma (SEA)

Operates only on 2026-03-02

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:00, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3856

21:10

Denver (DEN)

23:05

Seattle-Tacoma (SEA)

Effective 2026-06-04 through 2026-08-03

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 2:55, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3856

21:35

Denver (DEN)

23:30

Seattle-Tacoma (SEA)

Effective 2026-06-09 through 2026-07-29

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:55, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN3856

22:20

Denver (DEN)

00:10(+1)

Seattle-Tacoma (SEA)

Effective 2026-06-06 through 2026-08-01

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:50, non-stop
Boeing 737-700 (Scimitar Winglets)
The flight arrives 1 day after departure.

Direct Flights:

Southwest Airlines WN4030

15:45

Denver (DEN)

17:45

Seattle-Tacoma (SEA)

Effective 2026-06-07 through 2026-08-02

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:00, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4130

11:20

Denver (DEN)

13:15

Seattle-Tacoma (SEA)

Effective 2026-06-06 through 2026-08-01

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:55, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN4130

12:30

Denver (DEN)

14:25

Seattle-Tacoma (SEA)

Effective 2026-06-04 through 2026-08-03

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 2:55, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4130

12:55

Denver (DEN)

14:45

Seattle-Tacoma (SEA)

Effective 2026-06-09 through 2026-07-29

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:50, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4204

09:00

Denver (DEN)

10:55

Seattle-Tacoma (SEA)

Effective 2026-04-07 through 2026-06-03

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:55, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4204

16:00

Denver (DEN)

18:00

Seattle-Tacoma (SEA)

Operates only on 2026-05-24

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:00, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4204

16:15

Denver (DEN)

18:15

Seattle-Tacoma (SEA)

Effective 2026-04-11 through 2026-05-30

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:00, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4204

18:00

Denver (DEN)

20:10

Seattle-Tacoma (SEA)

Effective 2026-04-12 through 2026-05-17

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:10, non-stop
Boeing 737 MAX 8 (7M8)

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A domestic route departing from the Denver airport (DEN) and arriving at Seattle-Tacoma airport (SEA).
The flight distance is 1022 miles, or 1644 km.
The timezone of the departure airport is UTC-7 , 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 2:50 and 3:15.

All DEN-SEA flights

All Southwest Airlines flights

Return (SEA-DEN) flights

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