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

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FLIGHT SCHEDULE
Direct Flights:
Daily 12:40 Seattle-Tacoma (SEA) 16:21 Denver (DEN) Alaska Airlines AS 786 Non-stop Boeing 737 (73J) 2:41 Effective 2026-03-19 through 2026-05-12
Tue,Thu 13:36 Seattle-Tacoma (SEA) 17:20 Denver (DEN) Alaska Airlines AS 786 Non-stop Boeing 737 (73J) 2:44 Effective 2026-02-12 through 2026-02-17
Wed-Sun 13:36 Seattle-Tacoma (SEA) 17:20 Denver (DEN) Alaska Airlines AS 786 Non-stop Boeing 737 MAX 9 (7M9) 2:44 Effective 2026-02-13 through 2026-02-22
Mon,Wed-Sun 13:36 Seattle-Tacoma (SEA) 17:20 Denver (DEN) Alaska Airlines AS 786 Non-stop Boeing 737 MAX 9 (7M9) 2:44 Effective 2026-02-23 through 2026-03-06
Tue 13:36 Seattle-Tacoma (SEA) 17:20 Denver (DEN) Alaska Airlines AS 786 Non-stop Boeing 737 (73J) 2:44 Effective 2026-02-24 through 2026-03-10
Sun 13:36 Seattle-Tacoma (SEA) 17:20 Denver (DEN) Alaska Airlines AS 786 Non-stop Boeing 737-700 (73G) 2:44 Operates only on 2026-03-08
Mon,Wed,Thu 13:36 Seattle-Tacoma (SEA) 17:20 Denver (DEN) Alaska Airlines AS 786 Non-stop Boeing 737 MAX 9 (7M9) 2:44 Effective 2026-03-09 through 2026-03-12
Mon,Tue,Fri,Sun 13:36 Seattle-Tacoma (SEA) 17:20 Denver (DEN) Alaska Airlines AS 786 Non-stop Boeing 737 (73J) 2:44 Effective 2026-03-13 through 2026-03-17
Fri 20:17 Seattle-Tacoma (SEA) 23:59 Denver (DEN) Alaska Airlines AS 787 Non-stop Boeing 737-800 (73H) 2:42 Valid until 2026-01-02
Mon,Wed,Sat 20:17 Seattle-Tacoma (SEA) 23:59 Denver (DEN) Alaska Airlines AS 787 Non-stop Boeing 737 (73J) 2:42 Valid until 2026-01-05
Tue,Thu,Sun 20:17 Seattle-Tacoma (SEA) 23:59 Denver (DEN) Alaska Airlines AS 787 Non-stop Boeing 737 MAX 9 (7M9) 2:42 Valid until 2026-01-04
Mon-Fri 09:55 Seattle-Tacoma (SEA) 13:40 Denver (DEN) Southwest Airlines WN 862 Non-stop Boeing 737 MAX 8 (7M8) 2:45 Effective 2026-01-06 through 2026-01-14
Tue-Fri,Sun 09:55 Seattle-Tacoma (SEA) 13:40 Denver (DEN) Southwest Airlines WN 862 Non-stop Boeing 737 MAX 8 (7M8) 2:45 Effective 2026-01-18 through 2026-01-23
Mon-Fri 09:55 Seattle-Tacoma (SEA) 13:40 Denver (DEN) Southwest Airlines WN 862 Non-stop Boeing 737 MAX 8 (7M8) 2:45 Effective 2026-01-26 through 2026-02-04
Tue,Wed,Sun 09:55 Seattle-Tacoma (SEA) 13:40 Denver (DEN) Southwest Airlines WN 862 Non-stop Boeing 737 MAX 8 (7M8) 2:45 Effective 2026-02-08 through 2026-02-11
Tue,Wed 09:55 Seattle-Tacoma (SEA) 13:40 Denver (DEN) Southwest Airlines WN 862 Non-stop Boeing 737 MAX 8 (7M8) 2:45 Effective 2026-02-18 through 2026-03-04
Sat 10:20 Seattle-Tacoma (SEA) 14:00 Denver (DEN) Southwest Airlines WN 862 Non-stop Boeing 737-800 (73H) 2:40 Effective 2026-01-10 through 2026-02-07
Tue,Wed 14:15 Seattle-Tacoma (SEA) 18:10 Denver (DEN) Southwest Airlines WN 1049 Non-stop Boeing 737-800 (73H) 2:55 Effective 2026-06-09 through 2026-07-29
Sun 14:25 Seattle-Tacoma (SEA) 18:15 Denver (DEN) Southwest Airlines WN 1166 Non-stop Boeing 737 MAX 8 (7M8) 2:50 Effective 2026-06-07 through 2026-08-02
Tue,Wed 13:25 Seattle-Tacoma (SEA) 17:05 Denver (DEN) Southwest Airlines WN 1217 Non-stop Boeing 737 MAX 8 (7M8) 2:40 Effective 2026-03-10 through 2026-04-01
Mon,Thu,Fri 14:35 Seattle-Tacoma (SEA) 18:10 Denver (DEN) Southwest Airlines WN 1217 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Effective 2026-03-05 through 2026-04-06
Sat 14:45 Seattle-Tacoma (SEA) 18:15 Denver (DEN) Southwest Airlines WN 1217 Non-stop Boeing 737 MAX 8 (7M8) 2:30 Effective 2026-03-07 through 2026-04-04
Daily 19:02 Seattle-Tacoma (SEA) 22:53 Denver (DEN) United Airlines UA 1218 Non-stop Airbus A320 (320) 2:51 Effective 2026-03-29 through 2026-04-29
Daily 19:05 Seattle-Tacoma (SEA) 22:56 Denver (DEN) United Airlines UA 1218 Non-stop Boeing 737-800 (738) 2:51 Effective 2026-04-30 through 2026-05-20
Mon,Wed-Fri,Sun 19:10 Seattle-Tacoma (SEA) 22:49 Denver (DEN) United Airlines UA 1218 Non-stop Boeing 737 MAX 9 (7M9) 2:39 Effective 2026-02-12 through 2026-02-22
Wed-Fri,Sun 19:10 Seattle-Tacoma (SEA) 22:49 Denver (DEN) United Airlines UA 1218 Non-stop Boeing 737 MAX 9 (7M9) 2:39 Effective 2026-02-25 through 2026-03-05
Fri 19:10 Seattle-Tacoma (SEA) 22:50 Denver (DEN) United Airlines UA 1218 Non-stop Airbus A320 (320) 2:40 Effective 2026-03-06 through 2026-03-27
Wed,Thu,Sun 19:10 Seattle-Tacoma (SEA) 22:49 Denver (DEN) United Airlines UA 1218 Non-stop Boeing 737 MAX 9 (7M9) 2:39 Effective 2026-03-08 through 2026-03-26
Daily 19:10 Seattle-Tacoma (SEA) 22:55 Denver (DEN) United Airlines UA 1218 Non-stop Airbus A320 (320) 2:45 Effective from 2026-05-21
Mon,Tue,Thu-Sun 13:55 Seattle-Tacoma (SEA) 17:41 Denver (DEN) United Airlines UA 1263 Non-stop Boeing 737-800 (738) 2:46 Valid until 2026-01-05
Sat 14:05 Seattle-Tacoma (SEA) 17:40 Denver (DEN) Southwest Airlines WN 1290 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Effective 2026-02-14 through 2026-02-28
Mon,Thu,Fri 05:30 Seattle-Tacoma (SEA) 09:05 Denver (DEN) Southwest Airlines WN 1310 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Effective 2026-04-09 through 2026-06-01
Sun 05:35 Seattle-Tacoma (SEA) 09:10 Denver (DEN) Southwest Airlines WN 1310 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Effective 2026-04-12 through 2026-05-17
Sun 05:35 Seattle-Tacoma (SEA) 09:10 Denver (DEN) Southwest Airlines WN 1310 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Operates only on 2026-05-31
Sat 05:45 Seattle-Tacoma (SEA) 09:25 Denver (DEN) Southwest Airlines WN 1310 Non-stop Boeing 737 MAX 8 (7M8) 2:40 Effective 2026-04-11 through 2026-05-30
Tue,Wed 06:30 Seattle-Tacoma (SEA) 10:05 Denver (DEN) Southwest Airlines WN 1310 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Effective 2026-04-07 through 2026-06-03
Sun 06:40 Seattle-Tacoma (SEA) 10:15 Denver (DEN) Southwest Airlines WN 1310 Non-stop Boeing 737 MAX 8 (7M8) 2:35 Operates only on 2026-05-24
Daily 10:05 Seattle-Tacoma (SEA) 13:59 Denver (DEN) Alaska Airlines AS 1332 Non-stop Boeing 737 (73J) 2:54 Effective 2026-04-22 through 2026-05-12
Daily 12:46 Seattle-Tacoma (SEA) 16:30 Denver (DEN) United Airlines UA 1351 Non-stop Boeing 737 MAX 9 (7M9) 2:44 Effective from 2026-05-21
Daily 12:51 Seattle-Tacoma (SEA) 16:42 Denver (DEN) United Airlines UA 1351 Non-stop Airbus A321neo (32Q) 2:51 Effective 2026-04-30 through 2026-05-20
Daily 12:55 Seattle-Tacoma (SEA) 16:45 Denver (DEN) United Airlines UA 1351 Non-stop Boeing 737 MAX 9 (7M9) 2:50 Effective 2026-03-29 through 2026-04-29
Daily 08:25 Seattle-Tacoma (SEA) 12:22 Denver (DEN) Delta Air Lines DL 1358 Non-stop Airbus A220-100 (221) 2:57 Effective 2026-04-13 through 2026-05-06
Daily 08:25 Seattle-Tacoma (SEA) 12:22 Denver (DEN) Delta Air Lines DL 1358 Non-stop Airbus A220-300 (223) 2:57 Effective 2026-05-07 through 2026-10-05
Daily 08:25 Seattle-Tacoma (SEA) 12:17 Denver (DEN) Delta Air Lines DL 1358 Non-stop Airbus A220-300 (223) 2:52 Effective from 2026-10-06
Sat 12:30 Seattle-Tacoma (SEA) 16:16 Denver (DEN) United Airlines UA 1374 Non-stop Boeing 737-900 (739) 2:46 Valid until 2026-01-03
Thu,Sun 12:37 Seattle-Tacoma (SEA) 16:24 Denver (DEN) United Airlines UA 1374 Non-stop Airbus A319 (319) 2:47 Valid until 2026-01-04
Mon-Wed,Fri 12:44 Seattle-Tacoma (SEA) 16:30 Denver (DEN) United Airlines UA 1374 Non-stop Boeing 737-900 (739) 2:46 Valid until 2026-01-02
Mon 12:44 Seattle-Tacoma (SEA) 16:30 Denver (DEN) United Airlines UA 1374 Non-stop Boeing 737 MAX 8 (7M8) 2:46 Operates only on 2026-01-05
Mon,Thu,Fri 06:30 Seattle-Tacoma (SEA) 10:05 Denver (DEN) Southwest Airlines WN 1384 Non-stop Boeing 737-700 (Scimitar Winglets) 2:35 Effective 2026-08-06 through 2026-09-28
Tue,Wed 12:55 Seattle-Tacoma (SEA) 16:35 Denver (DEN) Southwest Airlines WN 1384 Non-stop Boeing 737-800 (73H) 2:40 Effective 2026-08-04 through 2026-09-30

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Parallax here SEA-DEN

1 2 3 4 5 6 ... 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:

Alaska Airlines AS786

12:40

Seattle-Tacoma (SEA)

16:21

Denver (DEN)

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:41, non-stop
Boeing 737 (73J)

Direct Flights:

Alaska Airlines AS786

13:36

Seattle-Tacoma (SEA)

17:20

Denver (DEN)

Effective 2026-02-12 through 2026-02-17

Mon
-

Tue

Wed
-

Thu

Fri
-

Sat
-

Sun
-

Duration: 2:44, non-stop
Boeing 737 (73J)

Direct Flights:

Alaska Airlines AS786

13:36

Seattle-Tacoma (SEA)

17:20

Denver (DEN)

Effective 2026-02-13 through 2026-02-22

Mon
-

Tue
-

Wed

Thu

Fri

Sat

Sun

Duration: 2:44, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

Alaska Airlines AS786

13:36

Seattle-Tacoma (SEA)

17:20

Denver (DEN)

Effective 2026-02-23 through 2026-03-06

Mon

Tue
-

Wed

Thu

Fri

Sat

Sun

Duration: 2:44, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

Alaska Airlines AS786

13:36

Seattle-Tacoma (SEA)

17:20

Denver (DEN)

Effective 2026-02-24 through 2026-03-10

Mon
-

Tue

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:44, non-stop
Boeing 737 (73J)

Direct Flights:

Alaska Airlines AS786

13:36

Seattle-Tacoma (SEA)

17:20

Denver (DEN)

Operates only on 2026-03-08

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:44, non-stop
Boeing 737-700 (73G)

Direct Flights:

Alaska Airlines AS786

13:36

Seattle-Tacoma (SEA)

17:20

Denver (DEN)

Effective 2026-03-09 through 2026-03-12

Mon

Tue
-

Wed

Thu

Fri
-

Sat
-

Sun
-

Duration: 2:44, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

Alaska Airlines AS786

13:36

Seattle-Tacoma (SEA)

17:20

Denver (DEN)

Effective 2026-03-13 through 2026-03-17

Mon

Tue

Wed
-

Thu
-

Fri

Sat
-

Sun

Duration: 2:44, non-stop
Boeing 737 (73J)

Direct Flights:

Alaska Airlines AS787

20:17

Seattle-Tacoma (SEA)

23:59

Denver (DEN)

Valid until 2026-01-02

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Duration: 2:42, non-stop
Boeing 737-800 (73H)

Direct Flights:

Alaska Airlines AS787

20:17

Seattle-Tacoma (SEA)

23:59

Denver (DEN)

Valid until 2026-01-05

Mon

Tue
-

Wed

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:42, non-stop
Boeing 737 (73J)

Direct Flights:

Alaska Airlines AS787

20:17

Seattle-Tacoma (SEA)

23:59

Denver (DEN)

Valid until 2026-01-04

Mon
-

Tue

Wed
-

Thu

Fri
-

Sat
-

Sun

Duration: 2:42, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

Southwest Airlines WN862

09:55

Seattle-Tacoma (SEA)

13:40

Denver (DEN)

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

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

Duration: 2:45, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN862

09:55

Seattle-Tacoma (SEA)

13:40

Denver (DEN)

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

Mon
-

Tue

Wed

Thu

Fri

Sat
-

Sun

Duration: 2:45, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN862

09:55

Seattle-Tacoma (SEA)

13:40

Denver (DEN)

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

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun
-

Duration: 2:45, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN862

09:55

Seattle-Tacoma (SEA)

13:40

Denver (DEN)

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun

Duration: 2:45, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN862

09:55

Seattle-Tacoma (SEA)

13:40

Denver (DEN)

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:45, non-stop
Boeing 737 MAX 8 (7M8)

Direct Flights:

Southwest Airlines WN862

10:20

Seattle-Tacoma (SEA)

14:00

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 2:40, non-stop
Boeing 737-800 (73H)

Direct Flights:

Southwest Airlines WN1049

14:15

Seattle-Tacoma (SEA)

18:10

Denver (DEN)

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 WN1166

14:25

Seattle-Tacoma (SEA)

18:15

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

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

Direct Flights:

Southwest Airlines WN1217

13:25

Seattle-Tacoma (SEA)

17:05

Denver (DEN)

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN1217

14:35

Seattle-Tacoma (SEA)

18:10

Denver (DEN)

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN1217

14:45

Seattle-Tacoma (SEA)

18:15

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

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

Direct Flights:

United Airlines UA1218

19:02

Seattle-Tacoma (SEA)

22:53

Denver (DEN)

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:51, non-stop
Airbus A320 (320)

Direct Flights:

United Airlines UA1218

19:05

Seattle-Tacoma (SEA)

22:56

Denver (DEN)

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:51, non-stop
Boeing 737-800 (738)

Direct Flights:

United Airlines UA1218

19:10

Seattle-Tacoma (SEA)

22:49

Denver (DEN)

Effective 2026-02-12 through 2026-02-22

Mon

Tue
-

Wed

Thu

Fri

Sat
-

Sun

Duration: 2:39, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

United Airlines UA1218

19:10

Seattle-Tacoma (SEA)

22:49

Denver (DEN)

Effective 2026-02-25 through 2026-03-05

Mon
-

Tue
-

Wed

Thu

Fri

Sat
-

Sun

Duration: 2:39, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

United Airlines UA1218

19:10

Seattle-Tacoma (SEA)

22:50

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Duration: 2:40, non-stop
Airbus A320 (320)

Direct Flights:

United Airlines UA1218

19:10

Seattle-Tacoma (SEA)

22:49

Denver (DEN)

Effective 2026-03-08 through 2026-03-26

Mon
-

Tue
-

Wed

Thu

Fri
-

Sat
-

Sun

Duration: 2:39, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

United Airlines UA1218

19:10

Seattle-Tacoma (SEA)

22:55

Denver (DEN)

Effective from 2026-05-21

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:45, non-stop
Airbus A320 (320)

Direct Flights:

United Airlines UA1263

13:55

Seattle-Tacoma (SEA)

17:41

Denver (DEN)

Valid until 2026-01-05

Mon

Tue

Wed
-

Thu

Fri

Sat

Sun

Duration: 2:46, non-stop
Boeing 737-800 (738)

Direct Flights:

Southwest Airlines WN1290

14:05

Seattle-Tacoma (SEA)

17:40

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

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

Direct Flights:

Southwest Airlines WN1310

05:30

Seattle-Tacoma (SEA)

09:05

Denver (DEN)

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN1310

05:35

Seattle-Tacoma (SEA)

09:10

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

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

Direct Flights:

Southwest Airlines WN1310

05:35

Seattle-Tacoma (SEA)

09:10

Denver (DEN)

Operates only on 2026-05-31

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

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

Direct Flights:

Southwest Airlines WN1310

05:45

Seattle-Tacoma (SEA)

09:25

Denver (DEN)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

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

Direct Flights:

Southwest Airlines WN1310

06:30

Seattle-Tacoma (SEA)

10:05

Denver (DEN)

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN1310

06:40

Seattle-Tacoma (SEA)

10:15

Denver (DEN)

Operates only on 2026-05-24

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

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

Direct Flights:

Alaska Airlines AS1332

10:05

Seattle-Tacoma (SEA)

13:59

Denver (DEN)

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:54, non-stop
Boeing 737 (73J)

Direct Flights:

United Airlines UA1351

12:46

Seattle-Tacoma (SEA)

16:30

Denver (DEN)

Effective from 2026-05-21

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:44, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

United Airlines UA1351

12:51

Seattle-Tacoma (SEA)

16:42

Denver (DEN)

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:51, non-stop
Airbus A321neo (32Q)

Direct Flights:

United Airlines UA1351

12:55

Seattle-Tacoma (SEA)

16:45

Denver (DEN)

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:50, non-stop
Boeing 737 MAX 9 (7M9)

Direct Flights:

Delta Air Lines DL1358

08:25

Seattle-Tacoma (SEA)

12:22

Denver (DEN)

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:57, non-stop
Airbus A220-100 (221)

Direct Flights:

Delta Air Lines DL1358

08:25

Seattle-Tacoma (SEA)

12:22

Denver (DEN)

Effective 2026-05-07 through 2026-10-05

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:57, non-stop
Airbus A220-300 (223)

Direct Flights:

Delta Air Lines DL1358

08:25

Seattle-Tacoma (SEA)

12:17

Denver (DEN)

Effective from 2026-10-06

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 2:52, non-stop
Airbus A220-300 (223)

Direct Flights:

United Airlines UA1374

12:30

Seattle-Tacoma (SEA)

16:16

Denver (DEN)

Valid until 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

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

Direct Flights:

United Airlines UA1374

12:37

Seattle-Tacoma (SEA)

16:24

Denver (DEN)

Valid until 2026-01-04

Mon
-

Tue
-

Wed
-

Thu

Fri
-

Sat
-

Sun

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

Direct Flights:

United Airlines UA1374

12:44

Seattle-Tacoma (SEA)

16:30

Denver (DEN)

Valid until 2026-01-02

Mon

Tue

Wed

Thu
-

Fri

Sat
-

Sun
-

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

Direct Flights:

United Airlines UA1374

12:44

Seattle-Tacoma (SEA)

16:30

Denver (DEN)

Operates only on 2026-01-05

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

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

Direct Flights:

Southwest Airlines WN1384

06:30

Seattle-Tacoma (SEA)

10:05

Denver (DEN)

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

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 2:35, non-stop
Boeing 737-700 (Scimitar Winglets)

Direct Flights:

Southwest Airlines WN1384

12:55

Seattle-Tacoma (SEA)

16:35

Denver (DEN)

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

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 2:40, non-stop
Boeing 737-800 (73H)

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Parallax here SEA-DEN

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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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