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

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FLIGHT SCHEDULE
Direct Flights:
Mon-Fri,Sun 17:09 Denver (DEN) 19:15 Seattle-Tacoma (SEA) Alaska Airlines AS 785 Non-stop Boeing 737 (73J) 3:06 Effective 2026-01-16 through 2026-01-26
Sat 17:09 Denver (DEN) 19:15 Seattle-Tacoma (SEA) Alaska Airlines AS 785 Non-stop Boeing 737-800 (73H) 3:06 Effective 2026-01-17 through 2026-01-24
Tue,Thu,Sat 17:09 Denver (DEN) 19:15 Seattle-Tacoma (SEA) Alaska Airlines AS 785 Non-stop Boeing 737-800 (73H) 3:06 Effective 2026-01-27 through 2026-01-31
Mon-Wed,Fri,Sun 17:09 Denver (DEN) 19:15 Seattle-Tacoma (SEA) Alaska Airlines AS 785 Non-stop Boeing 737 (73J) 3:06 Effective 2026-01-28 through 2026-02-09
Thu,Sat 17:09 Denver (DEN) 19:15 Seattle-Tacoma (SEA) Alaska Airlines AS 785 Non-stop Boeing 737-800 (73H) 3:06 Effective 2026-02-05 through 2026-02-07
Tue,Wed 17:09 Denver (DEN) 19:15 Seattle-Tacoma (SEA) Alaska Airlines AS 785 Non-stop Boeing 737 MAX 9 (7M9) 3:06 Effective 2026-02-10 through 2026-02-11
Wed 19:50 Denver (DEN) 21:50 Seattle-Tacoma (SEA) Alaska Airlines AS 785 Non-stop Boeing 737 (73J) 3:00 Operates only on 2026-03-18
Daily 19:50 Denver (DEN) 21:52 Seattle-Tacoma (SEA) Alaska Airlines AS 785 Non-stop Boeing 737 (73J) 3:02 Effective 2026-03-19 through 2026-05-12
Mon,Thu-Sun 19:52 Denver (DEN) 22:00 Seattle-Tacoma (SEA) Alaska Airlines AS 785 Non-stop Boeing 737 (73J) 3:08 Effective 2026-02-12 through 2026-03-02
Thu 19:52 Denver (DEN) 22:00 Seattle-Tacoma (SEA) Alaska Airlines AS 785 Non-stop Boeing 737 MAX 9 (7M9) 3:08 Operates only on 2026-03-05
Mon,Thu-Sun 19:52 Denver (DEN) 22:00 Seattle-Tacoma (SEA) Alaska Airlines AS 785 Non-stop Boeing 737 (73J) 3:08 Effective 2026-03-06 through 2026-03-13
Mon,Sat 19:52 Denver (DEN) 22:00 Seattle-Tacoma (SEA) Alaska Airlines AS 785 Non-stop Boeing 737 MAX 9 (7M9) 3:08 Effective 2026-03-14 through 2026-03-16
Sun 19:52 Denver (DEN) 22:00 Seattle-Tacoma (SEA) Alaska Airlines AS 785 Non-stop Boeing 737 (73J) 3:08 Operates only on 2026-03-15
Mon,Tue,Fri-Sun 07:50 Denver (DEN) 09:55 Seattle-Tacoma (SEA) Southwest Airlines WN 856 Non-stop Boeing 737-800 (73H) 3:05 Valid until 2026-01-04
Sat 11:15 Denver (DEN) 13:10 Seattle-Tacoma (SEA) Southwest Airlines WN 888 Non-stop Boeing 737 MAX 8 (7M8) 2:55 Effective 2026-08-08 through 2026-09-26
Tue 11:25 Denver (DEN) 13:20 Seattle-Tacoma (SEA) Southwest Airlines WN 888 Non-stop Boeing 737 MAX 8 (7M8) 2:55 Effective 2026-08-04 through 2026-09-29
Sun 11:40 Denver (DEN) 13:40 Seattle-Tacoma (SEA) Southwest Airlines WN 888 Non-stop Boeing 737-800 (73H) 3:00 Effective 2026-08-09 through 2026-09-27
Tue,Wed 20:30 Denver (DEN) 22:30 Seattle-Tacoma (SEA) Southwest Airlines WN 972 Non-stop Boeing 737-800 (73H) 3:00 Effective 2026-04-07 through 2026-06-03
Mon,Thu,Fri,Sun 09:00 Denver (DEN) 11:09 Seattle-Tacoma (SEA) Frontier Airlines F9 1175 Non-stop Airbus A320 (320) 3:09 Effective 2026-01-15 through 2026-01-19
Thu,Fri,Sun 09:10 Denver (DEN) 11:21 Seattle-Tacoma (SEA) Frontier Airlines F9 1175 Non-stop Airbus A320neo (32N) 3:11 Effective 2026-01-08 through 2026-01-11
Thu,Fri,Sun 09:10 Denver (DEN) 11:19 Seattle-Tacoma (SEA) Frontier Airlines F9 1175 Non-stop Airbus A320neo (32N) 3:09 Effective 2026-01-22 through 2026-01-29
Mon,Fri 09:10 Denver (DEN) 11:19 Seattle-Tacoma (SEA) Frontier Airlines F9 1175 Non-stop Airbus A321neo (32Q) 3:09 Effective 2026-01-26 through 2026-02-02
Thu,Fri,Sun 09:10 Denver (DEN) 11:19 Seattle-Tacoma (SEA) Frontier Airlines F9 1175 Non-stop Airbus A320neo (32N) 3:09 Effective 2026-02-01 through 2026-02-08
Mon 09:10 Denver (DEN) 11:19 Seattle-Tacoma (SEA) Frontier Airlines F9 1175 Non-stop Airbus A321neo (32Q) 3:09 Operates only on 2026-02-09
Mon,Fri,Sun 09:10 Denver (DEN) 11:19 Seattle-Tacoma (SEA) Frontier Airlines F9 1175 Non-stop Airbus A320neo (32N) 3:09 Effective 2026-02-13 through 2026-03-02
Thu 09:52 Denver (DEN) 12:01 Seattle-Tacoma (SEA) Frontier Airlines F9 1175 Non-stop Airbus A321neo (32Q) 3:09 Effective 2026-02-12 through 2026-03-05
Sat 09:52 Denver (DEN) 12:01 Seattle-Tacoma (SEA) Frontier Airlines F9 1175 Non-stop Airbus A320neo (32N) 3:09 Effective 2026-02-14 through 2026-02-28
Sat 11:24 Denver (DEN) 13:34 Seattle-Tacoma (SEA) Frontier Airlines F9 1175 Non-stop Airbus A320neo (32N) 3:10 Operates only on 2026-01-10
Sat 12:34 Denver (DEN) 14:43 Seattle-Tacoma (SEA) Frontier Airlines F9 1175 Non-stop Airbus A320neo (32N) 3:09 Operates only on 2026-01-17
Sat 17:20 Denver (DEN) 19:15 Seattle-Tacoma (SEA) Southwest Airlines WN 1271 Non-stop Boeing 737-800 (73H) 2:55 Effective 2026-03-07 through 2026-04-04
Daily 14:58 Denver (DEN) 17:00 Seattle-Tacoma (SEA) Alaska Airlines AS 1332 Non-stop Boeing 737 (73J) 3:02 Effective 2026-04-22 through 2026-05-12
Wed 12:15 Denver (DEN) 14:28 Seattle-Tacoma (SEA) Alaska Airlines AS 1350 Non-stop Boeing 737 MAX 9 (7M9) 3:13 Operates only on 2026-01-07
Mon-Fri 15:45 Denver (DEN) 17:50 Seattle-Tacoma (SEA) Southwest Airlines WN 1372 Non-stop Boeing 737 MAX 8 (7M8) 3:05 Effective 2026-01-06 through 2026-01-14
Tue-Fri,Sun 15:45 Denver (DEN) 17:50 Seattle-Tacoma (SEA) Southwest Airlines WN 1372 Non-stop Boeing 737 MAX 8 (7M8) 3:05 Effective 2026-01-18 through 2026-01-23
Mon-Fri 15:45 Denver (DEN) 17:50 Seattle-Tacoma (SEA) Southwest Airlines WN 1372 Non-stop Boeing 737 MAX 8 (7M8) 3:05 Effective 2026-01-26 through 2026-02-04
Sun 15:45 Denver (DEN) 17:50 Seattle-Tacoma (SEA) Southwest Airlines WN 1372 Non-stop Boeing 737 MAX 8 (7M8) 3:05 Operates only on 2026-02-08
Tue,Wed 15:45 Denver (DEN) 17:50 Seattle-Tacoma (SEA) Southwest Airlines WN 1372 Non-stop Boeing 737-700 (Scimitar Winglets) 3:05 Effective 2026-02-10 through 2026-02-11
Tue,Wed 15:45 Denver (DEN) 17:50 Seattle-Tacoma (SEA) Southwest Airlines WN 1372 Non-stop Boeing 737-700 (Scimitar Winglets) 3:05 Effective 2026-02-18 through 2026-03-04
Daily 11:15 Denver (DEN) 13:14 Seattle-Tacoma (SEA) United Airlines UA 1424 Non-stop Boeing 737-800 (738) 2:59 Effective 2026-03-29 through 2026-04-29
Daily 11:21 Denver (DEN) 13:20 Seattle-Tacoma (SEA) United Airlines UA 1424 Non-stop Boeing 737-800 (738) 2:59 Effective from 2026-04-30
Mon,Tue,Thu-Sun 11:42 Denver (DEN) 13:46 Seattle-Tacoma (SEA) United Airlines UA 1424 Non-stop Boeing 737-800 (738) 3:04 Effective 2026-03-05 through 2026-03-17
Wed 11:42 Denver (DEN) 13:46 Seattle-Tacoma (SEA) United Airlines UA 1424 Non-stop Airbus A319 (319) 3:04 Operates only on 2026-03-11
Daily 11:42 Denver (DEN) 13:46 Seattle-Tacoma (SEA) United Airlines UA 1424 Non-stop Boeing 737-800 (738) 3:04 Effective 2026-03-18 through 2026-03-28
Mon-Thu 11:50 Denver (DEN) 13:58 Seattle-Tacoma (SEA) United Airlines UA 1424 Non-stop Airbus A320 (320) 3:08 Valid until 2026-01-05
Fri-Sun 11:50 Denver (DEN) 13:58 Seattle-Tacoma (SEA) United Airlines UA 1424 Non-stop Airbus A319 (319) 3:08 Valid until 2026-01-04
Mon-Fri,Sun 11:50 Denver (DEN) 13:57 Seattle-Tacoma (SEA) United Airlines UA 1424 Non-stop Boeing 737-900 (739) 3:07 Effective 2026-01-06 through 2026-02-11
Sat 11:50 Denver (DEN) 13:58 Seattle-Tacoma (SEA) United Airlines UA 1424 Non-stop Airbus A321neo (32Q) 3:08 Effective 2026-01-10 through 2026-02-07
Mon,Thu,Fri 13:00 Denver (DEN) 14:55 Seattle-Tacoma (SEA) Southwest Airlines WN 1536 Non-stop Boeing 737 MAX 8 (7M8) 2:55 Effective 2026-08-06 through 2026-09-28
Mon,Thu,Fri 17:05 Denver (DEN) 19:05 Seattle-Tacoma (SEA) Southwest Airlines WN 1601 Non-stop Boeing 737 MAX 8 (7M8) 3:00 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 17:05 Denver (DEN) 19:05 Seattle-Tacoma (SEA) Southwest Airlines WN 1601 Non-stop Boeing 737 MAX 8 (7M8) 3:00 Effective 2026-02-20 through 2026-03-01

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Parallax here DEN-SEA

1 2 3 4 5 6 ... 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:

Alaska Airlines AS785

17:09

Denver (DEN)

19:15

Seattle-Tacoma (SEA)

Effective 2026-01-16 through 2026-01-26

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun

Duration: 3:06, non-stop
Boeing 737 (73J)

Direct Flights:

Alaska Airlines AS785

17:09

Denver (DEN)

19:15

Seattle-Tacoma (SEA)

Effective 2026-01-17 through 2026-01-24

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:06, non-stop
Boeing 737-800 (73H)

Direct Flights:

Alaska Airlines AS785

17:09

Denver (DEN)

19:15

Seattle-Tacoma (SEA)

Effective 2026-01-27 through 2026-01-31

Mon
-

Tue

Wed
-

Thu

Fri
-

Sat

Sun
-

Duration: 3:06, non-stop
Boeing 737-800 (73H)

Direct Flights:

Alaska Airlines AS785

17:09

Denver (DEN)

19:15

Seattle-Tacoma (SEA)

Effective 2026-01-28 through 2026-02-09

Mon

Tue

Wed

Thu
-

Fri

Sat
-

Sun

Duration: 3:06, non-stop
Boeing 737 (73J)

Direct Flights:

Alaska Airlines AS785

17:09

Denver (DEN)

19:15

Seattle-Tacoma (SEA)

Effective 2026-02-05 through 2026-02-07

Mon
-

Tue
-

Wed
-

Thu

Fri
-

Sat

Sun
-

Duration: 3:06, non-stop
Boeing 737-800 (73H)

Direct Flights:

Alaska Airlines AS785

17:09

Denver (DEN)

19:15

Seattle-Tacoma (SEA)

Effective 2026-02-10 through 2026-02-11

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:06, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

Alaska Airlines AS785

19:50

Denver (DEN)

21:50

Seattle-Tacoma (SEA)

Operates only on 2026-03-18

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun
-

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

Direct Flights:

Alaska Airlines AS785

19:50

Denver (DEN)

21:52

Seattle-Tacoma (SEA)

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:02, non-stop
Boeing 737 (73J)

Direct Flights:

Alaska Airlines AS785

19:52

Denver (DEN)

22:00

Seattle-Tacoma (SEA)

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat

Sun

Duration: 3:08, non-stop
Boeing 737 (73J)

Direct Flights:

Alaska Airlines AS785

19:52

Denver (DEN)

22:00

Seattle-Tacoma (SEA)

Operates only on 2026-03-05

Mon
-

Tue
-

Wed
-

Thu

Fri
-

Sat
-

Sun
-

Duration: 3:08, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

Alaska Airlines AS785

19:52

Denver (DEN)

22:00

Seattle-Tacoma (SEA)

Effective 2026-03-06 through 2026-03-13

Mon

Tue
-

Wed
-

Thu

Fri

Sat

Sun

Duration: 3:08, non-stop
Boeing 737 (73J)

Direct Flights:

Alaska Airlines AS785

19:52

Denver (DEN)

22:00

Seattle-Tacoma (SEA)

Effective 2026-03-14 through 2026-03-16

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:08, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

Alaska Airlines AS785

19:52

Denver (DEN)

22:00

Seattle-Tacoma (SEA)

Operates only on 2026-03-15

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 3:08, non-stop
Boeing 737 (73J)

Direct Flights:

Southwest Airlines WN856

07:50

Denver (DEN)

09:55

Seattle-Tacoma (SEA)

Valid until 2026-01-04

Mon

Tue

Wed
-

Thu
-

Fri

Sat

Sun

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

Direct Flights:

Southwest Airlines WN888

11:15

Denver (DEN)

13:10

Seattle-Tacoma (SEA)

Effective 2026-08-08 through 2026-09-26

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

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

Direct Flights:

Southwest Airlines WN888

11:25

Denver (DEN)

13:20

Seattle-Tacoma (SEA)

Effective 2026-08-04 through 2026-09-29

Mon
-

Tue

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN888

11:40

Denver (DEN)

13:40

Seattle-Tacoma (SEA)

Effective 2026-08-09 through 2026-09-27

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

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

Direct Flights:

Southwest Airlines WN972

20:30

Denver (DEN)

22:30

Seattle-Tacoma (SEA)

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

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

Direct Flights:

Frontier Airlines F91175

09:00

Denver (DEN)

11:09

Seattle-Tacoma (SEA)

Effective 2026-01-15 through 2026-01-19

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 3:09, non-stop
Airbus A320 (320)

Direct Flights:

Frontier Airlines F91175

09:10

Denver (DEN)

11:21

Seattle-Tacoma (SEA)

Effective 2026-01-08 through 2026-01-11

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 3:11, non-stop
Airbus A320neo (32N)

Direct Flights:

Frontier Airlines F91175

09:10

Denver (DEN)

11:19

Seattle-Tacoma (SEA)

Effective 2026-01-22 through 2026-01-29

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

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

Direct Flights:

Frontier Airlines F91175

09:10

Denver (DEN)

11:19

Seattle-Tacoma (SEA)

Effective 2026-01-26 through 2026-02-02

Mon

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Duration: 3:09, non-stop
Airbus A321neo (32Q)

Direct Flights:

Frontier Airlines F91175

09:10

Denver (DEN)

11:19

Seattle-Tacoma (SEA)

Effective 2026-02-01 through 2026-02-08

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

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

Direct Flights:

Frontier Airlines F91175

09:10

Denver (DEN)

11:19

Seattle-Tacoma (SEA)

Operates only on 2026-02-09

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:09, non-stop
Airbus A321neo (32Q)

Direct Flights:

Frontier Airlines F91175

09:10

Denver (DEN)

11:19

Seattle-Tacoma (SEA)

Effective 2026-02-13 through 2026-03-02

Mon

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun

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

Direct Flights:

Frontier Airlines F91175

09:52

Denver (DEN)

12:01

Seattle-Tacoma (SEA)

Effective 2026-02-12 through 2026-03-05

Mon
-

Tue
-

Wed
-

Thu

Fri
-

Sat
-

Sun
-

Duration: 3:09, non-stop
Airbus A321neo (32Q)

Direct Flights:

Frontier Airlines F91175

09:52

Denver (DEN)

12:01

Seattle-Tacoma (SEA)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

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

Direct Flights:

Frontier Airlines F91175

11:24

Denver (DEN)

13:34

Seattle-Tacoma (SEA)

Operates only on 2026-01-10

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:10, non-stop
Airbus A320neo (32N)

Direct Flights:

Frontier Airlines F91175

12:34

Denver (DEN)

14:43

Seattle-Tacoma (SEA)

Operates only on 2026-01-17

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

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

Direct Flights:

Southwest Airlines WN1271

17:20

Denver (DEN)

19:15

Seattle-Tacoma (SEA)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

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

Direct Flights:

Alaska Airlines AS1332

14:58

Denver (DEN)

17:00

Seattle-Tacoma (SEA)

Effective 2026-04-22 through 2026-05-12

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:02, non-stop
Boeing 737 (73J)

Direct Flights:

Alaska Airlines AS1350

12:15

Denver (DEN)

14:28

Seattle-Tacoma (SEA)

Operates only on 2026-01-07

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:13, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

Southwest Airlines WN1372

15:45

Denver (DEN)

17:50

Seattle-Tacoma (SEA)

Effective 2026-01-06 through 2026-01-14

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN1372

15:45

Denver (DEN)

17:50

Seattle-Tacoma (SEA)

Effective 2026-01-18 through 2026-01-23

Mon
-

Tue

Wed

Thu

Fri

Sat
-

Sun

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

Direct Flights:

Southwest Airlines WN1372

15:45

Denver (DEN)

17:50

Seattle-Tacoma (SEA)

Effective 2026-01-26 through 2026-02-04

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN1372

15:45

Denver (DEN)

17:50

Seattle-Tacoma (SEA)

Operates only on 2026-02-08

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

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

Direct Flights:

Southwest Airlines WN1372

15:45

Denver (DEN)

17:50

Seattle-Tacoma (SEA)

Effective 2026-02-10 through 2026-02-11

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:05, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN1372

15:45

Denver (DEN)

17:50

Seattle-Tacoma (SEA)

Effective 2026-02-18 through 2026-03-04

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:05, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

United Airlines UA1424

11:15

Denver (DEN)

13:14

Seattle-Tacoma (SEA)

Effective 2026-03-29 through 2026-04-29

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:59, non-stop
Boeing 737-800 (738)

Direct Flights:

United Airlines UA1424

11:21

Denver (DEN)

13:20

Seattle-Tacoma (SEA)

Effective from 2026-04-30

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:59, non-stop
Boeing 737-800 (738)

Direct Flights:

United Airlines UA1424

11:42

Denver (DEN)

13:46

Seattle-Tacoma (SEA)

Effective 2026-03-05 through 2026-03-17

Mon

Tue

Wed
-

Thu

Fri

Sat

Sun

Duration: 3:04, non-stop
Boeing 737-800 (738)

Direct Flights:

United Airlines UA1424

11:42

Denver (DEN)

13:46

Seattle-Tacoma (SEA)

Operates only on 2026-03-11

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 3:04, non-stop
Airbus A319 (319)

Direct Flights:

United Airlines UA1424

11:42

Denver (DEN)

13:46

Seattle-Tacoma (SEA)

Effective 2026-03-18 through 2026-03-28

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 3:04, non-stop
Boeing 737-800 (738)

Direct Flights:

United Airlines UA1424

11:50

Denver (DEN)

13:58

Seattle-Tacoma (SEA)

Valid until 2026-01-05

Mon

Tue

Wed

Thu

Fri
-

Sat
-

Sun
-

Duration: 3:08, non-stop
Airbus A320 (320)

Direct Flights:

United Airlines UA1424

11:50

Denver (DEN)

13:58

Seattle-Tacoma (SEA)

Valid until 2026-01-04

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat

Sun

Duration: 3:08, non-stop
Airbus A319 (319)

Direct Flights:

United Airlines UA1424

11:50

Denver (DEN)

13:57

Seattle-Tacoma (SEA)

Effective 2026-01-06 through 2026-02-11

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun

Duration: 3:07, non-stop
Boeing 737-900 (739)

Direct Flights:

United Airlines UA1424

11:50

Denver (DEN)

13:58

Seattle-Tacoma (SEA)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 3:08, non-stop
Airbus A321neo (32Q)

Direct Flights:

Southwest Airlines WN1536

13:00

Denver (DEN)

14:55

Seattle-Tacoma (SEA)

Effective 2026-08-06 through 2026-09-28

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN1601

17:05

Denver (DEN)

19:05

Seattle-Tacoma (SEA)

Effective 2026-02-12 through 2026-02-16

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN1601

17:05

Denver (DEN)

19:05

Seattle-Tacoma (SEA)

Effective 2026-02-20 through 2026-03-01

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 3:00, 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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