Alaska Airlines
flight
AS 4521:
Multiple routes
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FLIGHT SCHEDULE
Direct Codeshare Flights:
Alaska Airlines AS4521
Effective from 2026-10-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines.
(AA 1802)
Duration: 3:13, non-stop Airbus A321 (321)
Direct Codeshare Flights:
Alaska Airlines AS4521
Effective 2026-07-02 through 2026-08-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines.
(AA 1227)
Duration: 3:04, non-stop Airbus A321neo (32Q)
Direct Codeshare Flights:
Alaska Airlines AS4521
Effective 2026-05-21 through 2026-07-01
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines.
(AA 1227)
Duration: 3:12, non-stop Airbus A321neo (32Q)
Direct Codeshare Flights:
Alaska Airlines AS4521
Effective 2026-04-07 through 2026-05-20
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines.
(AA 1227)
Duration: 3:18, non-stop Airbus A321neo (32Q)
Direct Codeshare Flights:
Alaska Airlines AS4521
Effective 2026-08-05 through 2026-09-08
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines.
(AA 1227)
Duration: 3:04, non-stop Airbus A321 (321)
Direct Codeshare Flights:
Alaska Airlines AS4521
Effective 2026-09-09 through 2026-10-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines.
(AA 6254)
Duration: 3:02, non-stop Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4521
Valid until 2026-01-05
Mon
Tue
Wed
-
-
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines.
(AA 6497)
Duration: 2:58, non-stop Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4521
Effective 2026-02-12 through 2026-03-07
Mon
Tue
-
-
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines.
(AA 6497)
Duration: 3:00, non-stop Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4521
Effective 2026-01-06 through 2026-02-11
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines.
(AA 6497)
Duration: 1:54, non-stop Canadair CRJ 700 (CR7)
Direct Codeshare Flights:
Alaska Airlines AS4521
Effective 2026-09-09 through 2026-10-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines.
(AA 6254)
Duration: 3:16, non-stop Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4521
Valid until 2026-01-05
Mon
Tue
Wed
-
-
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines.
(AA 6497)
Duration: 3:35, non-stop Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4521
Effective 2026-02-12 through 2026-03-07
Mon
Tue
-
-
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines.
(AA 6497)
Duration: 3:37, non-stop Embraer EMB 175 (E75)
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This flight number is listed as serving the following routes:
- Grand Junction (GJT) - Phoenix Sky Harbor (PHX)
- Miami (MIA) - Dallas Fort Worth (DFW)
- San Antonio (SAT) - Los Angeles (LAX)