Alaska Airlines flight AS 643: Denver - Seattle-Tacoma

Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Mon-Fri 06:00 Denver (DEN) 07:59 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737 (73J) 2:59 Valid until 2024-09-02
Tue,Sat,Sun 06:00 Denver (DEN) 07:59 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737 MAX 9 (7M9) 2:59 Valid until 2024-09-03
Mon-Wed,Fri,Sat 06:00 Denver (DEN) 07:59 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737 (73J) 2:59 Effective 2024-09-04 through 2024-09-11
Thu 06:00 Denver (DEN) 07:59 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737-900 (739) 2:59 Operates only on 2024-09-05
Sun 06:00 Denver (DEN) 07:59 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737-800 (73H) 2:59 Effective 2024-09-08 through 2024-09-15
Mon,Tue,Thu-Sat 06:00 Denver (DEN) 07:59 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737 (73J) 2:59 Effective 2024-09-12 through 2024-09-17
Wed 06:00 Denver (DEN) 07:59 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737-900 (739) 2:59 Operates only on 2024-09-18
Thu 06:00 Denver (DEN) 07:59 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737-800 (73H) 2:59 Operates only on 2024-09-19
Daily 06:00 Denver (DEN) 07:59 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737 (73J) 2:59 Effective 2024-09-20 through 2024-09-27
Sat 06:00 Denver (DEN) 07:59 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737 MAX 9 (7M9) 2:59 Operates only on 2024-09-28
Sun 06:00 Denver (DEN) 07:59 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737 (73J) 2:59 Operates only on 2024-09-29
Mon 06:00 Denver (DEN) 07:59 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737-900 (739) 2:59 Operates only on 2024-09-30
Sun 06:00 Denver (DEN) 08:06 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737 (73J) 3:06 Operates only on 2024-10-27
Mon,Thu 06:00 Denver (DEN) 08:06 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737 MAX 9 (7M9) 3:06 Effective 2024-10-28 through 2024-11-11
Fri 06:00 Denver (DEN) 08:05 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737 (73J) 3:05 Operates only on 2024-11-01
Fri,Sun 06:00 Denver (DEN) 08:06 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737-800 (73H) 3:06 Effective 2024-11-03 through 2024-11-10
Thu,Fri,Sun 06:00 Denver (DEN) 08:06 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737-800 (73H) 3:06 Effective 2024-11-14 through 2024-11-21
Mon 06:00 Denver (DEN) 08:06 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737 MAX 9 (7M9) 3:06 Operates only on 2024-11-18
Mon-Wed,Fri-Sun 06:00 Denver (DEN) 08:05 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737 MAX 9 (7M9) 3:05 Effective 2024-11-22 through 2024-11-30
Thu 06:00 Denver (DEN) 08:05 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737 (73J) 3:05 Operates only on 2024-11-28
Sun 06:00 Denver (DEN) 08:05 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737-800 (73H) 3:05 Operates only on 2024-12-01
Mon 06:00 Denver (DEN) 08:05 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737 MAX 9 (7M9) 3:05 Operates only on 2024-12-02
Mon-Fri,Sun 06:00 Denver (DEN) 08:10 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737 MAX 9 (7M9) 3:10 Effective 2024-12-03 through 2024-12-15
Mon 06:00 Denver (DEN) 08:10 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737-800 (73H) 3:10 Operates only on 2024-12-16
Tue,Wed 06:00 Denver (DEN) 08:10 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737 MAX 9 (7M9) 3:10 Effective 2024-12-17 through 2024-12-18
Daily 06:00 Denver (DEN) 08:14 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737 (73J) 3:14 Effective 2024-12-19 through 2025-01-05
Tue 07:00 Denver (DEN) 09:06 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737 (73J) 3:06 Operates only on 2024-10-01
Tue,Wed 07:00 Denver (DEN) 09:06 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737 MAX 9 (7M9) 3:06 Effective 2024-10-02 through 2024-10-29
Wed 07:00 Denver (DEN) 09:06 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737-800 (73H) 3:06 Operates only on 2024-10-30
Wed,Sat 07:00 Denver (DEN) 09:06 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737 MAX 9 (7M9) 3:06 Effective 2024-11-02 through 2024-11-09
Tue 07:00 Denver (DEN) 09:06 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737 (73J) 3:06 Operates only on 2024-11-05
Tue,Wed,Sat 07:00 Denver (DEN) 09:06 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737 MAX 9 (7M9) 3:06 Effective 2024-11-12 through 2024-11-20
Daily 07:00 Denver (DEN) 09:00 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737 (73J) 3:00 Effective from 2025-03-19
Daily 08:00 Denver (DEN) 10:21 Seattle-Tacoma (SEA)
AS 643 Non-stop Boeing 737 (73J) 3:21 Effective 2025-01-06 through 2025-03-18


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Alaska Airlines flight AS 643:
Denver - Seattle-Tacoma
Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Alaska Airlines AS643
06:00
Denver (DEN)

07:59
Seattle-Tacoma (SEA)
Valid until 2024-09-02
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 2:59, non-stop
Boeing 737 (73J)
Alaska Airlines AS643
06:00
Denver (DEN)

07:59
Seattle-Tacoma (SEA)
Valid until 2024-09-03
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
Sun
Duration: 2:59, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS643
06:00
Denver (DEN)

07:59
Seattle-Tacoma (SEA)
Effective 2024-09-04 through 2024-09-11
Mon
Tue
Wed
Thu
-
Fri
Sat
Sun
-
Duration: 2:59, non-stop
Boeing 737 (73J)
Alaska Airlines AS643
06:00
Denver (DEN)

07:59
Seattle-Tacoma (SEA)
Operates only on 2024-09-05
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 2:59, non-stop
Boeing 737-900 (739)
Alaska Airlines AS643
06:00
Denver (DEN)

07:59
Seattle-Tacoma (SEA)
Effective 2024-09-08 through 2024-09-15
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:59, non-stop
Boeing 737-800 (73H)
Alaska Airlines AS643
06:00
Denver (DEN)

07:59
Seattle-Tacoma (SEA)
Effective 2024-09-12 through 2024-09-17
Mon
Tue
Wed
-
Thu
Fri
Sat
Sun
-
Duration: 2:59, non-stop
Boeing 737 (73J)
Alaska Airlines AS643
06:00
Denver (DEN)

07:59
Seattle-Tacoma (SEA)
Operates only on 2024-09-18
Mon
-
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:59, non-stop
Boeing 737-900 (739)
Alaska Airlines AS643
06:00
Denver (DEN)

07:59
Seattle-Tacoma (SEA)
Operates only on 2024-09-19
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 2:59, non-stop
Boeing 737-800 (73H)
Alaska Airlines AS643
06:00
Denver (DEN)

07:59
Seattle-Tacoma (SEA)
Effective 2024-09-20 through 2024-09-27
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:59, non-stop
Boeing 737 (73J)
Alaska Airlines AS643
06:00
Denver (DEN)

07:59
Seattle-Tacoma (SEA)
Operates only on 2024-09-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:59, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS643
06:00
Denver (DEN)

07:59
Seattle-Tacoma (SEA)
Operates only on 2024-09-29
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:59, non-stop
Boeing 737 (73J)
Alaska Airlines AS643
06:00
Denver (DEN)

07:59
Seattle-Tacoma (SEA)
Operates only on 2024-09-30
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:59, non-stop
Boeing 737-900 (739)
Alaska Airlines AS643
06:00
Denver (DEN)

08:06
Seattle-Tacoma (SEA)
Operates only on 2024-10-27
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:06, non-stop
Boeing 737 (73J)
Alaska Airlines AS643
06:00
Denver (DEN)

08:06
Seattle-Tacoma (SEA)
Effective 2024-10-28 through 2024-11-11
Mon
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 3:06, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS643
06:00
Denver (DEN)

08:05
Seattle-Tacoma (SEA)
Operates only on 2024-11-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 3:05, non-stop
Boeing 737 (73J)
Alaska Airlines AS643
06:00
Denver (DEN)

08:06
Seattle-Tacoma (SEA)
Effective 2024-11-03 through 2024-11-10
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
Duration: 3:06, non-stop
Boeing 737-800 (73H)
Alaska Airlines AS643
06:00
Denver (DEN)

08:06
Seattle-Tacoma (SEA)
Effective 2024-11-14 through 2024-11-21
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 3:06, non-stop
Boeing 737-800 (73H)
Alaska Airlines AS643
06:00
Denver (DEN)

08:06
Seattle-Tacoma (SEA)
Operates only on 2024-11-18
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 3:06, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS643
06:00
Denver (DEN)

08:05
Seattle-Tacoma (SEA)
Effective 2024-11-22 through 2024-11-30
Mon
Tue
Wed
Thu
-
Fri
Sat
Sun
Duration: 3:05, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS643
06:00
Denver (DEN)

08:05
Seattle-Tacoma (SEA)
Operates only on 2024-11-28
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 3:05, non-stop
Boeing 737 (73J)
Alaska Airlines AS643
06:00
Denver (DEN)

08:05
Seattle-Tacoma (SEA)
Operates only on 2024-12-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:05, non-stop
Boeing 737-800 (73H)
Alaska Airlines AS643
06:00
Denver (DEN)

08:05
Seattle-Tacoma (SEA)
Operates only on 2024-12-02
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 3:05, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS643
06:00
Denver (DEN)

08:10
Seattle-Tacoma (SEA)
Effective 2024-12-03 through 2024-12-15
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 3:10, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS643
06:00
Denver (DEN)

08:10
Seattle-Tacoma (SEA)
Operates only on 2024-12-16
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 3:10, non-stop
Boeing 737-800 (73H)
Alaska Airlines AS643
06:00
Denver (DEN)

08:10
Seattle-Tacoma (SEA)
Effective 2024-12-17 through 2024-12-18
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 3:10, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS643
06:00
Denver (DEN)

08:14
Seattle-Tacoma (SEA)
Effective 2024-12-19 through 2025-01-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 3:14, non-stop
Boeing 737 (73J)
Alaska Airlines AS643
07:00
Denver (DEN)

09:06
Seattle-Tacoma (SEA)
Operates only on 2024-10-01
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 3:06, non-stop
Boeing 737 (73J)
Alaska Airlines AS643
07:00
Denver (DEN)

09:06
Seattle-Tacoma (SEA)
Effective 2024-10-02 through 2024-10-29
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 3:06, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS643
07:00
Denver (DEN)

09:06
Seattle-Tacoma (SEA)
Operates only on 2024-10-30
Mon
-
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 3:06, non-stop
Boeing 737-800 (73H)
Alaska Airlines AS643
07:00
Denver (DEN)

09:06
Seattle-Tacoma (SEA)
Effective 2024-11-02 through 2024-11-09
Mon
-
Tue
-
Wed
Thu
-
Fri
-
Sat
Sun
-
Duration: 3:06, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS643
07:00
Denver (DEN)

09:06
Seattle-Tacoma (SEA)
Operates only on 2024-11-05
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 3:06, non-stop
Boeing 737 (73J)
Alaska Airlines AS643
07:00
Denver (DEN)

09:06
Seattle-Tacoma (SEA)
Effective 2024-11-12 through 2024-11-20
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
Sun
-
Duration: 3:06, non-stop
Boeing 737 MAX 9 (7M9)
Alaska Airlines AS643
07:00
Denver (DEN)

09:00
Seattle-Tacoma (SEA)
Effective from 2025-03-19
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 3:00, non-stop
Boeing 737 (73J)
Alaska Airlines AS643
08:00
Denver (DEN)

10:21
Seattle-Tacoma (SEA)
Effective 2025-01-06 through 2025-03-18
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 3:21, non-stop
Boeing 737 (73J)
  • AS 643 is a domestic flight 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 2:59 and 3:21.
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All DEN-SEA flights
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