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

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FLIGHT SCHEDULE
Direct Codeshare Flights:
Sat 12:30 Denver (DEN) 14:43 Seattle-Tacoma (SEA) WestJet WS 5483 Non-stop Embraer EMB 175 (E7W) 3:13 Effective 2026-01-10 through 2026-01-17 Codeshare flight, operated by Delta Air Lines.(DL 4168)
Fri,Sun 06:45 Denver (DEN) 08:53 Seattle-Tacoma (SEA) WestJet WS 5484 Non-stop Airbus A220-300 (223) 3:08 Effective 2026-06-12 through 2026-06-28 Codeshare flight, operated by Delta Air Lines.(DL 1731)
Fri,Sun 06:45 Denver (DEN) 08:53 Seattle-Tacoma (SEA) WestJet WS 5484 Non-stop Airbus A220-300 (223) 3:08 Effective 2026-07-05 through 2026-07-26 Codeshare flight, operated by Delta Air Lines.(DL 1731)
Fri 06:45 Denver (DEN) 08:53 Seattle-Tacoma (SEA) WestJet WS 5485 Non-stop Airbus A220-300 (223) 3:08 Operates only on 2026-07-03 Codeshare flight, operated by Delta Air Lines.(DL 1731)
Fri,Sun 06:45 Denver (DEN) 08:53 Seattle-Tacoma (SEA) WestJet WS 5488 Non-stop Airbus A220-300 (223) 3:08 Effective 2026-08-07 through 2026-10-04 Codeshare flight, operated by Delta Air Lines.(DL 1731)
Fri,Sun 06:45 Denver (DEN) 08:59 Seattle-Tacoma (SEA) WestJet WS 5488 Non-stop Airbus A220-300 (223) 3:14 Effective 2026-10-09 through 2026-10-11 Codeshare flight, operated by Delta Air Lines.(DL 1731)
Daily 12:20 Denver (DEN) 14:28 Seattle-Tacoma (SEA) KLM KL 5644 Non-stop Airbus A220-300 (223) 3:08 Valid until 2026-01-04 Codeshare flight, operated by Delta Air Lines.(DL 2740)
Sat,Sun 06:05 Denver (DEN) 08:20 Seattle-Tacoma (SEA) Air France AF 5785 Non-stop Airbus A220-300 (223) 3:15 Valid until 2026-01-03 Codeshare flight, operated by Delta Air Lines.(DL 1731)
Sun 06:05 Denver (DEN) 08:20 Seattle-Tacoma (SEA) Air France AF 5785 Non-stop Airbus A220-100 (221) 3:15 Operates only on 2026-01-04 Codeshare flight, operated by Delta Air Lines.(DL 1731)
Sat,Sun 06:29 Denver (DEN) 08:40 Seattle-Tacoma (SEA) Air France AF 5785 Non-stop Airbus A220-300 (223) 3:11 Effective 2026-01-10 through 2026-02-08 Codeshare flight, operated by Delta Air Lines.(DL 1731)
Sun 06:30 Denver (DEN) 08:36 Seattle-Tacoma (SEA) Air France AF 5785 Non-stop Airbus A220-300 (223) 3:06 Operates only on 2026-03-08 Codeshare flight, operated by Delta Air Lines.(DL 1731)
Sun 06:30 Denver (DEN) 08:38 Seattle-Tacoma (SEA) Air France AF 5785 Non-stop Airbus A220-300 (223) 3:08 Effective 2026-03-15 through 2026-03-22 Codeshare flight, operated by Delta Air Lines.(DL 1731)
Sat,Sun 06:40 Denver (DEN) 08:51 Seattle-Tacoma (SEA) Air France AF 5785 Non-stop Airbus A220-300 (223) 3:11 Effective 2026-02-14 through 2026-03-07 Codeshare flight, operated by Delta Air Lines.(DL 1731)
Sat 06:02 Denver (DEN) 08:10 Seattle-Tacoma (SEA) Korean Air KE 6030 Non-stop Boeing 737-800 (73H) 3:08 Valid until 2026-01-03 Codeshare flight, operated by Alaska Airlines.(AS 154)
Mon,Tue,Thu,Sun 06:02 Denver (DEN) 08:10 Seattle-Tacoma (SEA) Korean Air KE 6030 Non-stop Boeing 737 (73J) 3:08 Valid until 2026-01-04 Codeshare flight, operated by Alaska Airlines.(AS 154)
Mon,Wed,Fri 06:02 Denver (DEN) 08:10 Seattle-Tacoma (SEA) Korean Air KE 6030 Non-stop Boeing 737 MAX 9 (7M9) 3:08 Valid until 2026-01-05 Codeshare flight, operated by Alaska Airlines.(AS 154)
Tue 06:02 Denver (DEN) 08:10 Seattle-Tacoma (SEA) Korean Air KE 6030 Non-stop Boeing 737 (73J) 3:08 Operates only on 2026-01-06 Codeshare flight, operated by Alaska Airlines.(AS 154)
Daily 08:00 Denver (DEN) 09:59 Seattle-Tacoma (SEA) Korean Air KE 6030 Non-stop Boeing 737 (73J) 2:59 Effective 2026-05-13 through 2026-06-09 Codeshare flight, operated by Alaska Airlines.(AS 525)
Daily 08:00 Denver (DEN) 10:04 Seattle-Tacoma (SEA) Korean Air KE 6030 Non-stop Boeing 737 (73J) 3:04 Effective 2026-06-10 through 2026-10-02 Codeshare flight, operated by Alaska Airlines.(AS 715)
Daily 09:00 Denver (DEN) 11:04 Seattle-Tacoma (SEA) Korean Air KE 6030 Non-stop Boeing 737 (73J) 3:04 Effective 2026-10-03 through 2026-10-24 Codeshare flight, operated by Alaska Airlines.(AS 715)
Daily 06:00 Denver (DEN) 07:59 Seattle-Tacoma (SEA) Korean Air KE 6122 Non-stop Boeing 737 (73J) 2:59 Effective 2026-05-13 through 2026-06-09 Codeshare flight, operated by Alaska Airlines.(AS 643)
Daily 06:00 Denver (DEN) 08:05 Seattle-Tacoma (SEA) Korean Air KE 6122 Non-stop Boeing 737 (73J) 3:05 Effective 2026-06-10 through 2026-10-02 Codeshare flight, operated by Alaska Airlines.(AS 643)
Mon-Sat 07:00 Denver (DEN) 09:11 Seattle-Tacoma (SEA) Korean Air KE 6122 Non-stop Boeing 737 MAX 9 (7M9) 3:11 Effective 2026-01-07 through 2026-01-16 Codeshare flight, operated by Alaska Airlines.(AS 643)
Sat,Sun 07:00 Denver (DEN) 09:11 Seattle-Tacoma (SEA) Korean Air KE 6122 Non-stop Boeing 737 (73J) 3:11 Effective 2026-01-11 through 2026-01-18 Codeshare flight, operated by Alaska Airlines.(AS 643)
Mon,Wed-Sun 07:00 Denver (DEN) 09:11 Seattle-Tacoma (SEA) Korean Air KE 6122 Non-stop Boeing 737 MAX 9 (7M9) 3:11 Effective 2026-01-19 through 2026-01-25 Codeshare flight, operated by Alaska Airlines.(AS 643)
Mon,Tue 07:00 Denver (DEN) 09:11 Seattle-Tacoma (SEA) Korean Air KE 6122 Non-stop Boeing 737 (73J) 3:11 Effective 2026-01-20 through 2026-01-26 Codeshare flight, operated by Alaska Airlines.(AS 643)
Mon-Wed,Fri,Sat 07:00 Denver (DEN) 09:11 Seattle-Tacoma (SEA) Korean Air KE 6122 Non-stop Boeing 737 MAX 9 (7M9) 3:11 Effective 2026-01-27 through 2026-02-02 Codeshare flight, operated by Alaska Airlines.(AS 643)
Tue,Thu,Sun 07:00 Denver (DEN) 09:11 Seattle-Tacoma (SEA) Korean Air KE 6122 Non-stop Boeing 737 (73J) 3:11 Effective 2026-01-29 through 2026-02-03 Codeshare flight, operated by Alaska Airlines.(AS 643)
Mon,Wed-Sat 07:00 Denver (DEN) 09:11 Seattle-Tacoma (SEA) Korean Air KE 6122 Non-stop Boeing 737 MAX 9 (7M9) 3:11 Effective 2026-02-04 through 2026-02-11 Codeshare flight, operated by Alaska Airlines.(AS 643)
Tue,Sun 07:00 Denver (DEN) 09:11 Seattle-Tacoma (SEA) Korean Air KE 6122 Non-stop Boeing 737 (73J) 3:11 Effective 2026-02-08 through 2026-02-10 Codeshare flight, operated by Alaska Airlines.(AS 643)
Daily 07:00 Denver (DEN) 09:10 Seattle-Tacoma (SEA) Korean Air KE 6122 Non-stop Boeing 737 (73J) 3:10 Effective 2026-02-12 through 2026-03-06 Codeshare flight, operated by Alaska Airlines.(AS 643)
Fri-Sun 07:00 Denver (DEN) 09:10 Seattle-Tacoma (SEA) Korean Air KE 6122 Non-stop Boeing 737 MAX 9 (7M9) 3:10 Effective 2026-03-07 through 2026-03-15 Codeshare flight, operated by Alaska Airlines.(AS 643)
Mon 07:00 Denver (DEN) 09:10 Seattle-Tacoma (SEA) Korean Air KE 6122 Non-stop Boeing 737-800 (73H) 3:10 Operates only on 2026-03-09 Codeshare flight, operated by Alaska Airlines.(AS 643)
Mon-Thu 07:00 Denver (DEN) 09:10 Seattle-Tacoma (SEA) Korean Air KE 6122 Non-stop Boeing 737 (73J) 3:10 Effective 2026-03-10 through 2026-03-17 Codeshare flight, operated by Alaska Airlines.(AS 643)
Wed 07:00 Denver (DEN) 09:00 Seattle-Tacoma (SEA) Korean Air KE 6122 Non-stop Boeing 737 (73J) 3:00 Operates only on 2026-03-18 Codeshare flight, operated by Alaska Airlines.(AS 643)
Daily 07:00 Denver (DEN) 09:07 Seattle-Tacoma (SEA) Korean Air KE 6122 Non-stop Boeing 737 (73J) 3:07 Effective 2026-03-19 through 2026-05-12 Codeshare flight, operated by Alaska Airlines.(AS 643)
Daily 07:00 Denver (DEN) 09:05 Seattle-Tacoma (SEA) Korean Air KE 6122 Non-stop Boeing 737 (73J) 3:05 Effective from 2026-10-03 Codeshare flight, operated by Alaska Airlines.(AS 643)
Mon-Sat 07:00 Denver (DEN) 09:11 Seattle-Tacoma (SEA) JAL JL 6365 Non-stop Boeing 737 MAX 9 (7M9) 3:11 Effective 2026-01-07 through 2026-01-16 Codeshare flight, operated by Alaska Airlines.(AS 643)
Sat,Sun 07:00 Denver (DEN) 09:11 Seattle-Tacoma (SEA) JAL JL 6365 Non-stop Boeing 737 (73J) 3:11 Effective 2026-01-11 through 2026-01-18 Codeshare flight, operated by Alaska Airlines.(AS 643)
Mon,Wed-Sun 07:00 Denver (DEN) 09:11 Seattle-Tacoma (SEA) JAL JL 6365 Non-stop Boeing 737 MAX 9 (7M9) 3:11 Effective 2026-01-19 through 2026-01-25 Codeshare flight, operated by Alaska Airlines.(AS 643)
Mon,Tue 07:00 Denver (DEN) 09:11 Seattle-Tacoma (SEA) JAL JL 6365 Non-stop Boeing 737 (73J) 3:11 Effective 2026-01-20 through 2026-01-26 Codeshare flight, operated by Alaska Airlines.(AS 643)
Mon-Wed,Fri,Sat 07:00 Denver (DEN) 09:11 Seattle-Tacoma (SEA) JAL JL 6365 Non-stop Boeing 737 MAX 9 (7M9) 3:11 Effective 2026-01-27 through 2026-02-02 Codeshare flight, operated by Alaska Airlines.(AS 643)
Tue,Thu,Sun 07:00 Denver (DEN) 09:11 Seattle-Tacoma (SEA) JAL JL 6365 Non-stop Boeing 737 (73J) 3:11 Effective 2026-01-29 through 2026-02-03 Codeshare flight, operated by Alaska Airlines.(AS 643)
Mon,Wed-Sat 07:00 Denver (DEN) 09:11 Seattle-Tacoma (SEA) JAL JL 6365 Non-stop Boeing 737 MAX 9 (7M9) 3:11 Effective 2026-02-04 through 2026-02-11 Codeshare flight, operated by Alaska Airlines.(AS 643)
Tue,Sun 07:00 Denver (DEN) 09:11 Seattle-Tacoma (SEA) JAL JL 6365 Non-stop Boeing 737 (73J) 3:11 Effective 2026-02-08 through 2026-02-10 Codeshare flight, operated by Alaska Airlines.(AS 643)
Daily 07:00 Denver (DEN) 09:10 Seattle-Tacoma (SEA) JAL JL 6365 Non-stop Boeing 737 (73J) 3:10 Effective 2026-02-12 through 2026-03-06 Codeshare flight, operated by Alaska Airlines.(AS 643)
Fri-Sun 07:00 Denver (DEN) 09:10 Seattle-Tacoma (SEA) JAL JL 6365 Non-stop Boeing 737 MAX 9 (7M9) 3:10 Effective 2026-03-07 through 2026-03-15 Codeshare flight, operated by Alaska Airlines.(AS 643)
Mon 07:00 Denver (DEN) 09:10 Seattle-Tacoma (SEA) JAL JL 6365 Non-stop Boeing 737-800 (73H) 3:10 Operates only on 2026-03-09 Codeshare flight, operated by Alaska Airlines.(AS 643)
Mon-Thu 07:00 Denver (DEN) 09:10 Seattle-Tacoma (SEA) JAL JL 6365 Non-stop Boeing 737 (73J) 3:10 Effective 2026-03-10 through 2026-03-17 Codeshare flight, operated by Alaska Airlines.(AS 643)
Wed 07:00 Denver (DEN) 09:00 Seattle-Tacoma (SEA) JAL JL 6365 Non-stop Boeing 737 (73J) 3:00 Operates only on 2026-03-18 Codeshare flight, operated by Alaska Airlines.(AS 643)

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Parallax here DEN-SEA

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

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FLIGHT SCHEDULE

Direct Codeshare Flights:

WestJet WS5483

12:30

Denver (DEN)

14:43

Seattle-Tacoma (SEA)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Codeshare flight, operated by Delta Air Lines. (DL 4168)

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

Direct Codeshare Flights:

WestJet WS5484

06:45

Denver (DEN)

08:53

Seattle-Tacoma (SEA)

Effective 2026-06-12 through 2026-06-28

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun

Codeshare flight, operated by Delta Air Lines. (DL 1731)

Duration: 3:08, non-stop
Airbus A220-300 (223)

Direct Codeshare Flights:

WestJet WS5484

06:45

Denver (DEN)

08:53

Seattle-Tacoma (SEA)

Effective 2026-07-05 through 2026-07-26

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun

Codeshare flight, operated by Delta Air Lines. (DL 1731)

Duration: 3:08, non-stop
Airbus A220-300 (223)

Direct Codeshare Flights:

WestJet WS5485

06:45

Denver (DEN)

08:53

Seattle-Tacoma (SEA)

Operates only on 2026-07-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Codeshare flight, operated by Delta Air Lines. (DL 1731)

Duration: 3:08, non-stop
Airbus A220-300 (223)

Direct Codeshare Flights:

WestJet WS5488

06:45

Denver (DEN)

08:53

Seattle-Tacoma (SEA)

Effective 2026-08-07 through 2026-10-04

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun

Codeshare flight, operated by Delta Air Lines. (DL 1731)

Duration: 3:08, non-stop
Airbus A220-300 (223)

Direct Codeshare Flights:

WestJet WS5488

06:45

Denver (DEN)

08:59

Seattle-Tacoma (SEA)

Effective 2026-10-09 through 2026-10-11

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun

Codeshare flight, operated by Delta Air Lines. (DL 1731)

Duration: 3:14, non-stop
Airbus A220-300 (223)

Direct Codeshare Flights:

KLM KL5644

12:20

Denver (DEN)

14:28

Seattle-Tacoma (SEA)

Valid until 2026-01-04

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 2740)

Duration: 3:08, non-stop
Airbus A220-300 (223)

Direct Codeshare Flights:

Air France AF5785

06:05

Denver (DEN)

08:20

Seattle-Tacoma (SEA)

Valid until 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 1731)

Duration: 3:15, non-stop
Airbus A220-300 (223)

Direct Codeshare Flights:

Air France AF5785

06:05

Denver (DEN)

08:20

Seattle-Tacoma (SEA)

Operates only on 2026-01-04

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Codeshare flight, operated by Delta Air Lines. (DL 1731)

Duration: 3:15, non-stop
Airbus A220-100 (221)

Direct Codeshare Flights:

Air France AF5785

06:29

Denver (DEN)

08:40

Seattle-Tacoma (SEA)

Effective 2026-01-10 through 2026-02-08

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 1731)

Duration: 3:11, non-stop
Airbus A220-300 (223)

Direct Codeshare Flights:

Air France AF5785

06:30

Denver (DEN)

08:36

Seattle-Tacoma (SEA)

Operates only on 2026-03-08

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Codeshare flight, operated by Delta Air Lines. (DL 1731)

Duration: 3:06, non-stop
Airbus A220-300 (223)

Direct Codeshare Flights:

Air France AF5785

06:30

Denver (DEN)

08:38

Seattle-Tacoma (SEA)

Effective 2026-03-15 through 2026-03-22

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Codeshare flight, operated by Delta Air Lines. (DL 1731)

Duration: 3:08, non-stop
Airbus A220-300 (223)

Direct Codeshare Flights:

Air France AF5785

06:40

Denver (DEN)

08:51

Seattle-Tacoma (SEA)

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

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 1731)

Duration: 3:11, non-stop
Airbus A220-300 (223)

Direct Codeshare Flights:

Korean Air KE6030

06:02

Denver (DEN)

08:10

Seattle-Tacoma (SEA)

Valid until 2026-01-03

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Codeshare flight, operated by Alaska Airlines. (AS 154)

Duration: 3:08, non-stop
Boeing 737-800 (73H)

Direct Codeshare Flights:

Korean Air KE6030

06:02

Denver (DEN)

08:10

Seattle-Tacoma (SEA)

Valid until 2026-01-04

Mon

Tue

Wed
-

Thu

Fri
-

Sat
-

Sun

Codeshare flight, operated by Alaska Airlines. (AS 154)

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

Direct Codeshare Flights:

Korean Air KE6030

06:02

Denver (DEN)

08:10

Seattle-Tacoma (SEA)

Valid until 2026-01-05

Mon

Tue
-

Wed

Thu
-

Fri

Sat
-

Sun
-

Codeshare flight, operated by Alaska Airlines. (AS 154)

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

Direct Codeshare Flights:

Korean Air KE6030

06:02

Denver (DEN)

08:10

Seattle-Tacoma (SEA)

Operates only on 2026-01-06

Mon
-

Tue

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Codeshare flight, operated by Alaska Airlines. (AS 154)

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

Direct Codeshare Flights:

Korean Air KE6030

08:00

Denver (DEN)

09:59

Seattle-Tacoma (SEA)

Effective 2026-05-13 through 2026-06-09

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Alaska Airlines. (AS 525)

Duration: 2:59, non-stop
Boeing 737 (73J)

Direct Codeshare Flights:

Korean Air KE6030

08:00

Denver (DEN)

10:04

Seattle-Tacoma (SEA)

Effective 2026-06-10 through 2026-10-02

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Alaska Airlines. (AS 715)

Duration: 3:04, non-stop
Boeing 737 (73J)

Direct Codeshare Flights:

Korean Air KE6030

09:00

Denver (DEN)

11:04

Seattle-Tacoma (SEA)

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Alaska Airlines. (AS 715)

Duration: 3:04, non-stop
Boeing 737 (73J)

Direct Codeshare Flights:

Korean Air KE6122

06:00

Denver (DEN)

07:59

Seattle-Tacoma (SEA)

Effective 2026-05-13 through 2026-06-09

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Alaska Airlines. (AS 643)

Duration: 2:59, non-stop
Boeing 737 (73J)

Direct Codeshare Flights:

Korean Air KE6122

06:00

Denver (DEN)

08:05

Seattle-Tacoma (SEA)

Effective 2026-06-10 through 2026-10-02

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Alaska Airlines. (AS 643)

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

Direct Codeshare Flights:

Korean Air KE6122

07:00

Denver (DEN)

09:11

Seattle-Tacoma (SEA)

Effective 2026-01-07 through 2026-01-16

Mon

Tue

Wed

Thu

Fri

Sat

Sun
-

Codeshare flight, operated by Alaska Airlines. (AS 643)

Duration: 3:11, non-stop
Boeing 737 MAX 9 (7M9)

Direct Codeshare Flights:

Korean Air KE6122

07:00

Denver (DEN)

09:11

Seattle-Tacoma (SEA)

Effective 2026-01-11 through 2026-01-18

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun

Codeshare flight, operated by Alaska Airlines. (AS 643)

Duration: 3:11, non-stop
Boeing 737 (73J)

Direct Codeshare Flights:

Korean Air KE6122

07:00

Denver (DEN)

09:11

Seattle-Tacoma (SEA)

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

Mon

Tue
-

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Alaska Airlines. (AS 643)

Duration: 3:11, non-stop
Boeing 737 MAX 9 (7M9)

Direct Codeshare Flights:

Korean Air KE6122

07:00

Denver (DEN)

09:11

Seattle-Tacoma (SEA)

Effective 2026-01-20 through 2026-01-26

Mon

Tue

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Codeshare flight, operated by Alaska Airlines. (AS 643)

Duration: 3:11, non-stop
Boeing 737 (73J)

Direct Codeshare Flights:

Korean Air KE6122

07:00

Denver (DEN)

09:11

Seattle-Tacoma (SEA)

Effective 2026-01-27 through 2026-02-02

Mon

Tue

Wed

Thu
-

Fri

Sat

Sun
-

Codeshare flight, operated by Alaska Airlines. (AS 643)

Duration: 3:11, non-stop
Boeing 737 MAX 9 (7M9)

Direct Codeshare Flights:

Korean Air KE6122

07:00

Denver (DEN)

09:11

Seattle-Tacoma (SEA)

Effective 2026-01-29 through 2026-02-03

Mon
-

Tue

Wed
-

Thu

Fri
-

Sat
-

Sun

Codeshare flight, operated by Alaska Airlines. (AS 643)

Duration: 3:11, non-stop
Boeing 737 (73J)

Direct Codeshare Flights:

Korean Air KE6122

07:00

Denver (DEN)

09:11

Seattle-Tacoma (SEA)

Effective 2026-02-04 through 2026-02-11

Mon

Tue
-

Wed

Thu

Fri

Sat

Sun
-

Codeshare flight, operated by Alaska Airlines. (AS 643)

Duration: 3:11, non-stop
Boeing 737 MAX 9 (7M9)

Direct Codeshare Flights:

Korean Air KE6122

07:00

Denver (DEN)

09:11

Seattle-Tacoma (SEA)

Effective 2026-02-08 through 2026-02-10

Mon
-

Tue

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Codeshare flight, operated by Alaska Airlines. (AS 643)

Duration: 3:11, non-stop
Boeing 737 (73J)

Direct Codeshare Flights:

Korean Air KE6122

07:00

Denver (DEN)

09:10

Seattle-Tacoma (SEA)

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Alaska Airlines. (AS 643)

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

Direct Codeshare Flights:

Korean Air KE6122

07:00

Denver (DEN)

09:10

Seattle-Tacoma (SEA)

Effective 2026-03-07 through 2026-03-15

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat

Sun

Codeshare flight, operated by Alaska Airlines. (AS 643)

Duration: 3:10, non-stop
Boeing 737 MAX 9 (7M9)

Direct Codeshare Flights:

Korean Air KE6122

07:00

Denver (DEN)

09:10

Seattle-Tacoma (SEA)

Operates only on 2026-03-09

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Codeshare flight, operated by Alaska Airlines. (AS 643)

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

Direct Codeshare Flights:

Korean Air KE6122

07:00

Denver (DEN)

09:10

Seattle-Tacoma (SEA)

Effective 2026-03-10 through 2026-03-17

Mon

Tue

Wed

Thu

Fri
-

Sat
-

Sun
-

Codeshare flight, operated by Alaska Airlines. (AS 643)

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

Direct Codeshare Flights:

Korean Air KE6122

07:00

Denver (DEN)

09:00

Seattle-Tacoma (SEA)

Operates only on 2026-03-18

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Codeshare flight, operated by Alaska Airlines. (AS 643)

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

Direct Codeshare Flights:

Korean Air KE6122

07:00

Denver (DEN)

09:07

Seattle-Tacoma (SEA)

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Alaska Airlines. (AS 643)

Duration: 3:07, non-stop
Boeing 737 (73J)

Direct Codeshare Flights:

Korean Air KE6122

07:00

Denver (DEN)

09:05

Seattle-Tacoma (SEA)

Effective from 2026-10-03

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Alaska Airlines. (AS 643)

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

Direct Codeshare Flights:

JAL JL6365

07:00

Denver (DEN)

09:11

Seattle-Tacoma (SEA)

Effective 2026-01-07 through 2026-01-16

Mon

Tue

Wed

Thu

Fri

Sat

Sun
-

Codeshare flight, operated by Alaska Airlines. (AS 643)

Duration: 3:11, non-stop
Boeing 737 MAX 9 (7M9)

Direct Codeshare Flights:

JAL JL6365

07:00

Denver (DEN)

09:11

Seattle-Tacoma (SEA)

Effective 2026-01-11 through 2026-01-18

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun

Codeshare flight, operated by Alaska Airlines. (AS 643)

Duration: 3:11, non-stop
Boeing 737 (73J)

Direct Codeshare Flights:

JAL JL6365

07:00

Denver (DEN)

09:11

Seattle-Tacoma (SEA)

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

Mon

Tue
-

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Alaska Airlines. (AS 643)

Duration: 3:11, non-stop
Boeing 737 MAX 9 (7M9)

Direct Codeshare Flights:

JAL JL6365

07:00

Denver (DEN)

09:11

Seattle-Tacoma (SEA)

Effective 2026-01-20 through 2026-01-26

Mon

Tue

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Codeshare flight, operated by Alaska Airlines. (AS 643)

Duration: 3:11, non-stop
Boeing 737 (73J)

Direct Codeshare Flights:

JAL JL6365

07:00

Denver (DEN)

09:11

Seattle-Tacoma (SEA)

Effective 2026-01-27 through 2026-02-02

Mon

Tue

Wed

Thu
-

Fri

Sat

Sun
-

Codeshare flight, operated by Alaska Airlines. (AS 643)

Duration: 3:11, non-stop
Boeing 737 MAX 9 (7M9)

Direct Codeshare Flights:

JAL JL6365

07:00

Denver (DEN)

09:11

Seattle-Tacoma (SEA)

Effective 2026-01-29 through 2026-02-03

Mon
-

Tue

Wed
-

Thu

Fri
-

Sat
-

Sun

Codeshare flight, operated by Alaska Airlines. (AS 643)

Duration: 3:11, non-stop
Boeing 737 (73J)

Direct Codeshare Flights:

JAL JL6365

07:00

Denver (DEN)

09:11

Seattle-Tacoma (SEA)

Effective 2026-02-04 through 2026-02-11

Mon

Tue
-

Wed

Thu

Fri

Sat

Sun
-

Codeshare flight, operated by Alaska Airlines. (AS 643)

Duration: 3:11, non-stop
Boeing 737 MAX 9 (7M9)

Direct Codeshare Flights:

JAL JL6365

07:00

Denver (DEN)

09:11

Seattle-Tacoma (SEA)

Effective 2026-02-08 through 2026-02-10

Mon
-

Tue

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Codeshare flight, operated by Alaska Airlines. (AS 643)

Duration: 3:11, non-stop
Boeing 737 (73J)

Direct Codeshare Flights:

JAL JL6365

07:00

Denver (DEN)

09:10

Seattle-Tacoma (SEA)

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

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Alaska Airlines. (AS 643)

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

Direct Codeshare Flights:

JAL JL6365

07:00

Denver (DEN)

09:10

Seattle-Tacoma (SEA)

Effective 2026-03-07 through 2026-03-15

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat

Sun

Codeshare flight, operated by Alaska Airlines. (AS 643)

Duration: 3:10, non-stop
Boeing 737 MAX 9 (7M9)

Direct Codeshare Flights:

JAL JL6365

07:00

Denver (DEN)

09:10

Seattle-Tacoma (SEA)

Operates only on 2026-03-09

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Codeshare flight, operated by Alaska Airlines. (AS 643)

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

Direct Codeshare Flights:

JAL JL6365

07:00

Denver (DEN)

09:10

Seattle-Tacoma (SEA)

Effective 2026-03-10 through 2026-03-17

Mon

Tue

Wed

Thu

Fri
-

Sat
-

Sun
-

Codeshare flight, operated by Alaska Airlines. (AS 643)

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

Direct Codeshare Flights:

JAL JL6365

07:00

Denver (DEN)

09:00

Seattle-Tacoma (SEA)

Operates only on 2026-03-18

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Codeshare flight, operated by Alaska Airlines. (AS 643)

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

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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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