All airlines flying from Denver (DEN) to Seattle-Tacoma (SEA).

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FLIGHT SCHEDULE
Direct Flights:
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
Daily 13:03 Denver (DEN) 15:12 Seattle-Tacoma (SEA) Delta Air Lines DL 3675 Non-stop Embraer EMB 175 (E7W) 3:09 Effective 2026-03-08 through 2026-03-14
Daily 13:03 Denver (DEN) 15:14 Seattle-Tacoma (SEA) Delta Air Lines DL 3675 Non-stop Embraer EMB 175 (E7W) 3:11 Effective 2026-03-15 through 2026-04-12
Daily 18:50 Denver (DEN) 21:10 Seattle-Tacoma (SEA) Delta Air Lines DL 3696 Non-stop Embraer EMB 175 (E7W) 3:20 Effective 2026-01-05 through 2026-02-11
Daily 18:50 Denver (DEN) 21:08 Seattle-Tacoma (SEA) Delta Air Lines DL 3696 Non-stop Embraer EMB 175 (E7W) 3:18 Effective 2026-02-12 through 2026-03-07
Daily 19:39 Denver (DEN) 21:50 Seattle-Tacoma (SEA) Delta Air Lines DL 3795 Non-stop Embraer EMB 175 (E7W) 3:11 Effective 2026-03-08 through 2026-04-12
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.
Daily 19:50 Denver (DEN) 22:05 Seattle-Tacoma (SEA) Delta Air Lines DL 4026 Non-stop Embraer EMB 175 (E7W) 3:15 Effective 2026-04-13 through 2026-05-06
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
Mon-Fri,Sun 12:30 Denver (DEN) 14:43 Seattle-Tacoma (SEA) Delta Air Lines DL 4168 Non-stop Embraer EMB 175 (E7W) 3:13 Effective 2026-01-05 through 2026-02-11
Sat 12:30 Denver (DEN) 14:43 Seattle-Tacoma (SEA) Delta Air Lines DL 4168 Non-stop Embraer EMB 175 (E7W) 3:13 Effective 2026-01-10 through 2026-01-17
Mon-Fri,Sun 12:30 Denver (DEN) 14:41 Seattle-Tacoma (SEA) Delta Air Lines DL 4168 Non-stop Embraer EMB 175 (E7W) 3:11 Effective 2026-02-12 through 2026-03-06
Sat 12:55 Denver (DEN) 15:06 Seattle-Tacoma (SEA) Delta Air Lines DL 4168 Non-stop Embraer EMB 175 (E7W) 3:11 Effective 2026-02-14 through 2026-03-07
Sat 13:30 Denver (DEN) 15:43 Seattle-Tacoma (SEA) Delta Air Lines DL 4168 Non-stop Embraer EMB 175 (E7W) 3:13 Effective 2026-01-24 through 2026-02-07
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
Sun 18:00 Denver (DEN) 20:10 Seattle-Tacoma (SEA) Southwest Airlines WN 4204 Non-stop Boeing 737 MAX 8 (7M8) 3:10 Operates only on 2026-05-31
Sat 07:55 Denver (DEN) 10:10 Seattle-Tacoma (SEA) Southwest Airlines WN 4473 Non-stop Boeing 737-700 (Scimitar Winglets) 3:15 Effective 2026-01-10 through 2026-02-07
Sat 08:00 Denver (DEN) 10:15 Seattle-Tacoma (SEA) Southwest Airlines WN 4473 Non-stop Boeing 737 MAX 8 (7M8) 3:15 Effective 2026-02-14 through 2026-02-28
Thu,Fri,Sun 08:20 Denver (DEN) 10:25 Seattle-Tacoma (SEA) Southwest Airlines WN 4473 Non-stop Boeing 737 MAX 8 (7M8) 3:05 Effective 2026-01-11 through 2026-01-16
Mon,Sun 08:20 Denver (DEN) 10:25 Seattle-Tacoma (SEA) Southwest Airlines WN 4473 Non-stop Boeing 737 MAX 8 (7M8) 3:05 Effective 2026-01-19 through 2026-01-25
Thu,Fri,Sun 08:20 Denver (DEN) 10:25 Seattle-Tacoma (SEA) Southwest Airlines WN 4473 Non-stop Boeing 737 MAX 8 (7M8) 3:05 Effective 2026-02-01 through 2026-02-06
Mon,Sun 08:20 Denver (DEN) 10:25 Seattle-Tacoma (SEA) Southwest Airlines WN 4473 Non-stop Boeing 737 MAX 8 (7M8) 3:05 Effective 2026-02-09 through 2026-02-15
Mon,Tue,Thu 08:20 Denver (DEN) 10:25 Seattle-Tacoma (SEA) Southwest Airlines WN 4473 Non-stop Boeing 737 MAX 8 (7M8) 3:05 Effective 2026-02-17 through 2026-02-23
Mon 08:20 Denver (DEN) 10:25 Seattle-Tacoma (SEA) Southwest Airlines WN 4473 Non-stop Boeing 737 MAX 8 (7M8) 3:05 Operates only on 2026-03-02
Mon,Thu,Fri,Sun 09:10 Denver (DEN) 11:19 Seattle-Tacoma (SEA) Frontier Airlines F9 4545 Non-stop Airbus A320neo (32N) 3:09 Effective 2026-03-06 through 2026-03-30
Mon,Tue,Thu,Sun 10:16 Denver (DEN) 12:30 Seattle-Tacoma (SEA) Frontier Airlines F9 4545 Non-stop Airbus A321neo (32Q) 3:14 Valid until 2026-01-05
Fri 10:16 Denver (DEN) 12:30 Seattle-Tacoma (SEA) Frontier Airlines F9 4545 Non-stop Airbus A321 (321) 3:14 Operates only on 2026-01-02
Mon,Thu-Sun 10:16 Denver (DEN) 12:30 Seattle-Tacoma (SEA) Frontier Airlines F9 4545 Non-stop Airbus A321 (321) 3:14 Effective 2026-04-02 through 2026-04-13
Sat 10:22 Denver (DEN) 12:36 Seattle-Tacoma (SEA) Frontier Airlines F9 4545 Non-stop Airbus A320neo (32N) 3:14 Operates only on 2026-01-03
Sat 14:15 Denver (DEN) 16:15 Seattle-Tacoma (SEA) Southwest Airlines WN 4605 Non-stop Boeing 737 MAX 8 (7M8) 3:00 Valid until 2026-01-03
Thu,Fri 08:05 Denver (DEN) 10:20 Seattle-Tacoma (SEA) Southwest Airlines WN 4746 Non-stop Boeing 737 MAX 8 (7M8) 3:15 Effective 2026-02-12 through 2026-02-13

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Parallax here DEN-SEA

1 2 3 4 5 6 7 8 9 ... 15 16 17

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 3:20.

Return (SEA-DEN) flights

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All airlines flying from Denver (DEN) to Seattle-Tacoma (SEA).

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FLIGHT SCHEDULE

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:

Delta Air Lines DL3675

13:03

Denver (DEN)

15:12

Seattle-Tacoma (SEA)

Effective 2026-03-08 through 2026-03-14

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:09, non-stop
Embraer EMB 175 (E7W)

Direct Flights:

Delta Air Lines DL3675

13:03

Denver (DEN)

15:14

Seattle-Tacoma (SEA)

Effective 2026-03-15 through 2026-04-12

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:11, non-stop
Embraer EMB 175 (E7W)

Direct Flights:

Delta Air Lines DL3696

18:50

Denver (DEN)

21:10

Seattle-Tacoma (SEA)

Effective 2026-01-05 through 2026-02-11

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:20, non-stop
Embraer EMB 175 (E7W)

Direct Flights:

Delta Air Lines DL3696

18:50

Denver (DEN)

21:08

Seattle-Tacoma (SEA)

Effective 2026-02-12 through 2026-03-07

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:18, non-stop
Embraer EMB 175 (E7W)

Direct Flights:

Delta Air Lines DL3795

19:39

Denver (DEN)

21:50

Seattle-Tacoma (SEA)

Effective 2026-03-08 through 2026-04-12

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:11, non-stop
Embraer EMB 175 (E7W)

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:

Delta Air Lines DL4026

19:50

Denver (DEN)

22:05

Seattle-Tacoma (SEA)

Effective 2026-04-13 through 2026-05-06

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:15, non-stop
Embraer EMB 175 (E7W)

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:

Delta Air Lines DL4168

12:30

Denver (DEN)

14:43

Seattle-Tacoma (SEA)

Effective 2026-01-05 through 2026-02-11

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun

Duration: 3:13, non-stop
Embraer EMB 175 (E7W)

Direct Flights:

Delta Air Lines DL4168

12:30

Denver (DEN)

14:43

Seattle-Tacoma (SEA)

Effective 2026-01-10 through 2026-01-17

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:13, non-stop
Embraer EMB 175 (E7W)

Direct Flights:

Delta Air Lines DL4168

12:30

Denver (DEN)

14:41

Seattle-Tacoma (SEA)

Effective 2026-02-12 through 2026-03-06

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun

Duration: 3:11, non-stop
Embraer EMB 175 (E7W)

Direct Flights:

Delta Air Lines DL4168

12:55

Denver (DEN)

15:06

Seattle-Tacoma (SEA)

Effective 2026-02-14 through 2026-03-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:11, non-stop
Embraer EMB 175 (E7W)

Direct Flights:

Delta Air Lines DL4168

13:30

Denver (DEN)

15:43

Seattle-Tacoma (SEA)

Effective 2026-01-24 through 2026-02-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:13, non-stop
Embraer EMB 175 (E7W)

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)

Direct Flights:

Southwest Airlines WN4204

18:00

Denver (DEN)

20:10

Seattle-Tacoma (SEA)

Operates only on 2026-05-31

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

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

Direct Flights:

Southwest Airlines WN4473

07:55

Denver (DEN)

10:10

Seattle-Tacoma (SEA)

Effective 2026-01-10 through 2026-02-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:15, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN4473

08:00

Denver (DEN)

10:15

Seattle-Tacoma (SEA)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:15, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4473

08:20

Denver (DEN)

10:25

Seattle-Tacoma (SEA)

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

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 3:05, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4473

08:20

Denver (DEN)

10:25

Seattle-Tacoma (SEA)

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

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:05, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4473

08:20

Denver (DEN)

10:25

Seattle-Tacoma (SEA)

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

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 3:05, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4473

08:20

Denver (DEN)

10:25

Seattle-Tacoma (SEA)

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

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:05, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4473

08:20

Denver (DEN)

10:25

Seattle-Tacoma (SEA)

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

Mon

Tue

Wed
-

Thu

Fri
-

Sat
-

Sun
-

Duration: 3:05, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN4473

08:20

Denver (DEN)

10:25

Seattle-Tacoma (SEA)

Operates only on 2026-03-02

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:05, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Frontier Airlines F94545

09:10

Denver (DEN)

11:19

Seattle-Tacoma (SEA)

Effective 2026-03-06 through 2026-03-30

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 3:09, non-stop
Airbus A320neo (32N)

Direct Flights:

Frontier Airlines F94545

10:16

Denver (DEN)

12:30

Seattle-Tacoma (SEA)

Valid until 2026-01-05

Mon

Tue

Wed
-

Thu

Fri
-

Sat
-

Sun

Duration: 3:14, non-stop
Airbus A321neo (32Q)

Direct Flights:

Frontier Airlines F94545

10:16

Denver (DEN)

12:30

Seattle-Tacoma (SEA)

Operates only on 2026-01-02

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Duration: 3:14, non-stop
Airbus A321 (321)

Direct Flights:

Frontier Airlines F94545

10:16

Denver (DEN)

12:30

Seattle-Tacoma (SEA)

Effective 2026-04-02 through 2026-04-13

Mon

Tue
-

Wed
-

Thu

Fri

Sat

Sun

Duration: 3:14, non-stop
Airbus A321 (321)

Direct Flights:

Frontier Airlines F94545

10:22

Denver (DEN)

12:36

Seattle-Tacoma (SEA)

Operates only on 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:14, non-stop
Airbus A320neo (32N)

Direct Flights:

Southwest Airlines WN4605

14:15

Denver (DEN)

16:15

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 WN4746

08:05

Denver (DEN)

10:20

Seattle-Tacoma (SEA)

Effective 2026-02-12 through 2026-02-13

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 3:15, 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 3:20.

Return (SEA-DEN) flights

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