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

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FLIGHT SCHEDULE
Direct Flights:
Sun 13:45 Seattle-Tacoma (SEA) 17:40 Denver (DEN) Southwest Airlines WN 1384 Non-stop Boeing 737-800 (73H) 2:55 Effective 2026-08-09 through 2026-09-27
Daily 17:59 Seattle-Tacoma (SEA) 21:48 Denver (DEN) Alaska Airlines AS 1403 Non-stop Boeing 737 (73J) 2:49 Effective 2026-06-10 through 2026-08-18
Daily 19:59 Seattle-Tacoma (SEA) 23:48 Denver (DEN) Alaska Airlines AS 1403 Non-stop Boeing 737 (73J) 2:49 Effective from 2026-08-19
Fri,Sun 12:10 Seattle-Tacoma (SEA) 15:50 Denver (DEN) Southwest Airlines WN 1456 Non-stop Boeing 737-700 (Scimitar Winglets) 2:40 Effective 2026-01-02 through 2026-01-04
Sat 13:10 Seattle-Tacoma (SEA) 16:40 Denver (DEN) Southwest Airlines WN 1456 Non-stop Boeing 737-800 (73H) 2:30 Valid until 2026-01-03
Mon-Thu,Sun 05:02 Seattle-Tacoma (SEA) 08:51 Denver (DEN) United Airlines UA 1479 Non-stop Airbus A320 (320) 2:49 Valid until 2026-01-04
Fri,Sat 05:02 Seattle-Tacoma (SEA) 08:51 Denver (DEN) United Airlines UA 1479 Non-stop Airbus A319 (319) 2:49 Effective 2026-01-02 through 2026-01-03
Mon 05:02 Seattle-Tacoma (SEA) 08:51 Denver (DEN) United Airlines UA 1479 Non-stop Boeing 737-800 (738) 2:49 Operates only on 2026-01-05
Daily 08:30 Seattle-Tacoma (SEA) 12:11 Denver (DEN) United Airlines UA 1505 Non-stop Boeing 737 MAX 9 (7M9) 2:41 Effective from 2026-05-21
Daily 08:40 Seattle-Tacoma (SEA) 12:32 Denver (DEN) United Airlines UA 1505 Non-stop Airbus A320 (320) 2:52 Effective 2026-01-06 through 2026-02-11
Daily 08:55 Seattle-Tacoma (SEA) 12:45 Denver (DEN) United Airlines UA 1505 Non-stop Boeing 737-800 (738) 2:50 Effective 2026-03-29 through 2026-04-29
Daily 08:56 Seattle-Tacoma (SEA) 12:45 Denver (DEN) United Airlines UA 1505 Non-stop Boeing 737-800 (738) 2:49 Effective 2026-04-30 through 2026-05-20
Daily 08:57 Seattle-Tacoma (SEA) 12:44 Denver (DEN) United Airlines UA 1505 Non-stop Airbus A319 (319) 2:47 Valid until 2026-01-05
Daily 08:59 Seattle-Tacoma (SEA) 12:44 Denver (DEN) United Airlines UA 1505 Non-stop Boeing 737-800 (738) 2:45 Effective 2026-03-05 through 2026-03-28
Daily 09:00 Seattle-Tacoma (SEA) 12:45 Denver (DEN) United Airlines UA 1505 Non-stop Boeing 737-800 (738) 2:45 Effective 2026-02-12 through 2026-03-04
Sat 10:55 Seattle-Tacoma (SEA) 14:35 Denver (DEN) Southwest Airlines WN 1513 Non-stop Boeing 737 MAX 8 (7M8) 2:40 Effective 2026-02-14 through 2026-02-28
Sat 12:40 Seattle-Tacoma (SEA) 16:15 Denver (DEN) Southwest Airlines WN 1513 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Effective 2026-01-10 through 2026-02-07
Mon-Fri 14:05 Seattle-Tacoma (SEA) 17:40 Denver (DEN) Southwest Airlines WN 1513 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Effective 2026-01-06 through 2026-01-14
Tue-Fri,Sun 14:05 Seattle-Tacoma (SEA) 17:40 Denver (DEN) Southwest Airlines WN 1513 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Effective 2026-01-18 through 2026-01-23
Mon-Fri 14:05 Seattle-Tacoma (SEA) 17:40 Denver (DEN) Southwest Airlines WN 1513 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Effective 2026-01-26 through 2026-02-04
Tue,Wed,Sun 14:05 Seattle-Tacoma (SEA) 17:40 Denver (DEN) Southwest Airlines WN 1513 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Effective 2026-02-08 through 2026-02-11
Tue,Wed 14:05 Seattle-Tacoma (SEA) 17:40 Denver (DEN) Southwest Airlines WN 1513 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Effective 2026-02-18 through 2026-03-04
Thu,Fri,Sun 14:15 Seattle-Tacoma (SEA) 17:50 Denver (DEN) Southwest Airlines WN 1513 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Effective 2026-01-11 through 2026-01-16
Mon,Sun 14:15 Seattle-Tacoma (SEA) 17:50 Denver (DEN) Southwest Airlines WN 1513 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Effective 2026-01-19 through 2026-01-25
Thu,Fri,Sun 14:15 Seattle-Tacoma (SEA) 17:50 Denver (DEN) Southwest Airlines WN 1513 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Effective 2026-02-01 through 2026-02-06
Mon,Sun 14:15 Seattle-Tacoma (SEA) 17:50 Denver (DEN) Southwest Airlines WN 1513 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Effective 2026-02-09 through 2026-02-15
Mon,Tue,Thu 14:15 Seattle-Tacoma (SEA) 17:50 Denver (DEN) Southwest Airlines WN 1513 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Effective 2026-02-17 through 2026-02-23
Mon 14:15 Seattle-Tacoma (SEA) 17:50 Denver (DEN) Southwest Airlines WN 1513 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Operates only on 2026-03-02
Mon,Thu,Fri 16:30 Seattle-Tacoma (SEA) 20:00 Denver (DEN) Southwest Airlines WN 1513 Non-stop Boeing 737-700 (Scimitar Winglets) 2:30 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 16:30 Seattle-Tacoma (SEA) 20:00 Denver (DEN) Southwest Airlines WN 1513 Non-stop Boeing 737-700 (Scimitar Winglets) 2:30 Effective 2026-02-20 through 2026-03-01
Sat 08:50 Seattle-Tacoma (SEA) 12:25 Denver (DEN) Southwest Airlines WN 1567 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Valid until 2026-01-03
Wed,Thu 14:20 Seattle-Tacoma (SEA) 17:55 Denver (DEN) Southwest Airlines WN 1567 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Valid until 2026-01-01
Mon,Tue,Fri,Sun 20:35 Seattle-Tacoma (SEA) 00:05 Denver (DEN) Southwest Airlines WN 1567 Non-stop Boeing 737 MAX 8 (7M8) 2:30 Valid until 2026-01-04 The flight arrives 1 day after departure.
Mon 08:35 Seattle-Tacoma (SEA) 12:10 Denver (DEN) Southwest Airlines WN 1692 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Operates only on 2026-01-05
Sun 11:00 Seattle-Tacoma (SEA) 14:40 Denver (DEN) Southwest Airlines WN 1722 Non-stop Boeing 737 MAX 8 (7M8) 2:40 Operates only on 2026-05-24
Sun 14:45 Seattle-Tacoma (SEA) 18:15 Denver (DEN) Southwest Airlines WN 1841 Non-stop Boeing 737 MAX 8 (7M8) 2:30 Effective 2026-03-08 through 2026-04-05
Daily 11:11 Seattle-Tacoma (SEA) 14:52 Denver (DEN) United Airlines UA 2031 Non-stop Boeing 737 MAX 9 (7M9) 2:41 Effective 2026-05-21 through 2026-10-24
Sun 18:25 Seattle-Tacoma (SEA) 22:10 Denver (DEN) Southwest Airlines WN 2079 Non-stop Boeing 737-800 (73H) 2:45 Effective 2026-08-09 through 2026-09-27
Wed,Thu 05:40 Seattle-Tacoma (SEA) 09:15 Denver (DEN) Southwest Airlines WN 2141 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Valid until 2026-01-01
Tue 12:25 Seattle-Tacoma (SEA) 16:11 Denver (DEN) United Airlines UA 2258 Non-stop Boeing 737-900 (739) 2:46 Operates only on 2026-01-06
Daily 12:25 Seattle-Tacoma (SEA) 16:11 Denver (DEN) United Airlines UA 2258 Non-stop Boeing 737 MAX 8 (7M8) 2:46 Effective 2026-01-07 through 2026-02-02
Tue 12:25 Seattle-Tacoma (SEA) 16:11 Denver (DEN) United Airlines UA 2258 Non-stop Boeing 737 MAX 9 (7M9) 2:46 Operates only on 2026-02-03
Daily 12:25 Seattle-Tacoma (SEA) 16:11 Denver (DEN) United Airlines UA 2258 Non-stop Boeing 737 MAX 8 (7M8) 2:46 Effective 2026-02-05 through 2026-02-11
Wed 12:35 Seattle-Tacoma (SEA) 16:21 Denver (DEN) United Airlines UA 2258 Non-stop Boeing 737 MAX 8 (7M8) 2:46 Operates only on 2026-02-04
Tue,Wed 19:30 Seattle-Tacoma (SEA) 23:05 Denver (DEN) Southwest Airlines WN 2328 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Effective 2026-06-09 through 2026-07-29
Mon,Tue,Thu-Sun 05:00 Seattle-Tacoma (SEA) 08:38 Denver (DEN) United Airlines UA 2601 Non-stop Boeing 737 MAX 9 (7M9) 2:38 Effective 2026-02-12 through 2026-02-23
Tue,Wed 05:00 Seattle-Tacoma (SEA) 08:38 Denver (DEN) United Airlines UA 2601 Non-stop Boeing 737-800 (738) 2:38 Effective 2026-02-18 through 2026-03-04
Mon,Thu-Sun 05:00 Seattle-Tacoma (SEA) 08:38 Denver (DEN) United Airlines UA 2601 Non-stop Boeing 737 MAX 9 (7M9) 2:38 Effective 2026-02-26 through 2026-03-07
Sun 05:00 Seattle-Tacoma (SEA) 08:39 Denver (DEN) United Airlines UA 2601 Non-stop Airbus A319 (319) 2:39 Effective 2026-03-08 through 2026-03-22
Mon-Sat 05:00 Seattle-Tacoma (SEA) 08:38 Denver (DEN) United Airlines UA 2601 Non-stop Boeing 737 MAX 9 (7M9) 2:38 Effective 2026-03-09 through 2026-03-28

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Parallax here SEA-DEN

1 2 3 4 5 6 7 ... 14 15 16

A domestic route departing from the Seattle-Tacoma airport (SEA) and arriving at Denver airport (DEN).
The flight distance is 1022 miles, or 1644 km.
The timezone of the departure airport is UTC-8 , and the timezone of the arrival airport is UTC-7 . 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 2:30 and 3:02.

Return (DEN-SEA) flights

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

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FLIGHT SCHEDULE

Direct Flights:

Southwest Airlines WN1384

13:45

Seattle-Tacoma (SEA)

17:40

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

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

Direct Flights:

Alaska Airlines AS1403

17:59

Seattle-Tacoma (SEA)

21:48

Denver (DEN)

Effective 2026-06-10 through 2026-08-18

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:49, non-stop
Boeing 737 (73J)

Direct Flights:

Alaska Airlines AS1403

19:59

Seattle-Tacoma (SEA)

23:48

Denver (DEN)

Effective from 2026-08-19

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:49, non-stop
Boeing 737 (73J)

Direct Flights:

Southwest Airlines WN1456

12:10

Seattle-Tacoma (SEA)

15:50

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun

Duration: 2:40, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN1456

13:10

Seattle-Tacoma (SEA)

16:40

Denver (DEN)

Valid until 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:30, non-stop
Boeing 737-800 (73H)

Direct Flights:

United Airlines UA1479

05:02

Seattle-Tacoma (SEA)

08:51

Denver (DEN)

Valid until 2026-01-04

Mon

Tue

Wed

Thu

Fri
-

Sat
-

Sun

Duration: 2:49, non-stop
Airbus A320 (320)

Direct Flights:

United Airlines UA1479

05:02

Seattle-Tacoma (SEA)

08:51

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat

Sun
-

Duration: 2:49, non-stop
Airbus A319 (319)

Direct Flights:

United Airlines UA1479

05:02

Seattle-Tacoma (SEA)

08:51

Denver (DEN)

Operates only on 2026-01-05

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:49, non-stop
Boeing 737-800 (738)

Direct Flights:

United Airlines UA1505

08:30

Seattle-Tacoma (SEA)

12:11

Denver (DEN)

Effective from 2026-05-21

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:41, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

United Airlines UA1505

08:40

Seattle-Tacoma (SEA)

12:32

Denver (DEN)

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:52, non-stop
Airbus A320 (320)

Direct Flights:

United Airlines UA1505

08:55

Seattle-Tacoma (SEA)

12:45

Denver (DEN)

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:50, non-stop
Boeing 737-800 (738)

Direct Flights:

United Airlines UA1505

08:56

Seattle-Tacoma (SEA)

12:45

Denver (DEN)

Effective 2026-04-30 through 2026-05-20

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:49, non-stop
Boeing 737-800 (738)

Direct Flights:

United Airlines UA1505

08:57

Seattle-Tacoma (SEA)

12:44

Denver (DEN)

Valid until 2026-01-05

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:47, non-stop
Airbus A319 (319)

Direct Flights:

United Airlines UA1505

08:59

Seattle-Tacoma (SEA)

12:44

Denver (DEN)

Effective 2026-03-05 through 2026-03-28

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:45, non-stop
Boeing 737-800 (738)

Direct Flights:

United Airlines UA1505

09:00

Seattle-Tacoma (SEA)

12:45

Denver (DEN)

Effective 2026-02-12 through 2026-03-04

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:45, non-stop
Boeing 737-800 (738)

Direct Flights:

Southwest Airlines WN1513

10:55

Seattle-Tacoma (SEA)

14:35

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:40, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1513

12:40

Seattle-Tacoma (SEA)

16:15

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1513

14:05

Seattle-Tacoma (SEA)

17:40

Denver (DEN)

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

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1513

14:05

Seattle-Tacoma (SEA)

17:40

Denver (DEN)

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

Mon
-

Tue

Wed

Thu

Fri

Sat
-

Sun

Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1513

14:05

Seattle-Tacoma (SEA)

17:40

Denver (DEN)

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

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1513

14:05

Seattle-Tacoma (SEA)

17:40

Denver (DEN)

Effective 2026-02-08 through 2026-02-11

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1513

14:05

Seattle-Tacoma (SEA)

17:40

Denver (DEN)

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1513

14:15

Seattle-Tacoma (SEA)

17:50

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1513

14:15

Seattle-Tacoma (SEA)

17:50

Denver (DEN)

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

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1513

14:15

Seattle-Tacoma (SEA)

17:50

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1513

14:15

Seattle-Tacoma (SEA)

17:50

Denver (DEN)

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

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1513

14:15

Seattle-Tacoma (SEA)

17:50

Denver (DEN)

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

Mon

Tue

Wed
-

Thu

Fri
-

Sat
-

Sun
-

Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1513

14:15

Seattle-Tacoma (SEA)

17:50

Denver (DEN)

Operates only on 2026-03-02

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1513

16:30

Seattle-Tacoma (SEA)

20:00

Denver (DEN)

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 2:30, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN1513

16:30

Seattle-Tacoma (SEA)

20:00

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Duration: 2:30, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN1567

08:50

Seattle-Tacoma (SEA)

12:25

Denver (DEN)

Valid until 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1567

14:20

Seattle-Tacoma (SEA)

17:55

Denver (DEN)

Valid until 2026-01-01

Mon
-

Tue
-

Wed

Thu

Fri
-

Sat
-

Sun
-

Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1567

20:35

Seattle-Tacoma (SEA)

00:05(+1)

Denver (DEN)

Valid until 2026-01-04

Mon

Tue

Wed
-

Thu
-

Fri

Sat
-

Sun

Duration: 2:30, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.

Direct Flights:

Southwest Airlines WN1692

08:35

Seattle-Tacoma (SEA)

12:10

Denver (DEN)

Operates only on 2026-01-05

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1722

11:00

Seattle-Tacoma (SEA)

14:40

Denver (DEN)

Operates only on 2026-05-24

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:40, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN1841

14:45

Seattle-Tacoma (SEA)

18:15

Denver (DEN)

Effective 2026-03-08 through 2026-04-05

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:30, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

United Airlines UA2031

11:11

Seattle-Tacoma (SEA)

14:52

Denver (DEN)

Effective 2026-05-21 through 2026-10-24

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:41, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

Southwest Airlines WN2079

18:25

Seattle-Tacoma (SEA)

22:10

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:45, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN2141

05:40

Seattle-Tacoma (SEA)

09:15

Denver (DEN)

Valid until 2026-01-01

Mon
-

Tue
-

Wed

Thu

Fri
-

Sat
-

Sun
-

Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

United Airlines UA2258

12:25

Seattle-Tacoma (SEA)

16:11

Denver (DEN)

Operates only on 2026-01-06

Mon
-

Tue

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:46, non-stop
Boeing 737-900 (739)

Direct Flights:

United Airlines UA2258

12:25

Seattle-Tacoma (SEA)

16:11

Denver (DEN)

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:46, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

United Airlines UA2258

12:25

Seattle-Tacoma (SEA)

16:11

Denver (DEN)

Operates only on 2026-02-03

Mon
-

Tue

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:46, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

United Airlines UA2258

12:25

Seattle-Tacoma (SEA)

16:11

Denver (DEN)

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:46, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

United Airlines UA2258

12:35

Seattle-Tacoma (SEA)

16:21

Denver (DEN)

Operates only on 2026-02-04

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:46, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN2328

19:30

Seattle-Tacoma (SEA)

23:05

Denver (DEN)

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:35, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

United Airlines UA2601

05:00

Seattle-Tacoma (SEA)

08:38

Denver (DEN)

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

Mon

Tue

Wed
-

Thu

Fri

Sat

Sun

Duration: 2:38, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

United Airlines UA2601

05:00

Seattle-Tacoma (SEA)

08:38

Denver (DEN)

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:38, non-stop
Boeing 737-800 (738)

Direct Flights:

United Airlines UA2601

05:00

Seattle-Tacoma (SEA)

08:38

Denver (DEN)

Effective 2026-02-26 through 2026-03-07

Mon

Tue
-

Wed
-

Thu

Fri

Sat

Sun

Duration: 2:38, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

United Airlines UA2601

05:00

Seattle-Tacoma (SEA)

08:39

Denver (DEN)

Effective 2026-03-08 through 2026-03-22

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:39, non-stop
Airbus A319 (319)

Direct Flights:

United Airlines UA2601

05:00

Seattle-Tacoma (SEA)

08:38

Denver (DEN)

Effective 2026-03-09 through 2026-03-28

Mon

Tue

Wed

Thu

Fri

Sat

Sun
-

Duration: 2:38, non-stop
Boeing 737 MAX 9 (7M9)

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A domestic route departing from the Seattle-Tacoma airport (SEA) and arriving at Denver airport (DEN).
The flight distance is 1022 miles, or 1644 km.
The timezone of the departure airport is UTC-8 , and the timezone of the arrival airport is UTC-7 . 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 2:30 and 3:02.

Return (DEN-SEA) flights

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