Alaska Airlines flight AS 4599: Multiple routes

Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Daily 12:15 Phoenix Sky Harbor (PHX) 4 17:27 Saint Louis (STL) 1
AS 4599 Non-stop Embraer EMB 175 (E75) 3:12 Effective 2026-07-02 through 2026-08-04
Codeshare flight, operated by American Airlines.(AA 6364)
Daily 18:29 Saint Louis (STL) 1 19:55 Phoenix Sky Harbor (PHX) 4
AS 4599 Non-stop Embraer EMB 175 (E75) 3:26 Effective 2026-07-02 through 2026-08-04
Codeshare flight, operated by American Airlines.(AA 6364)
Sat 20:00 Ronald Reagan Washington (DCA) 2 21:37 Portland (PWM)
AS 4599 Non-stop Airbus A319 (319) 1:37 Effective 2026-01-10 through 2026-02-07
Codeshare flight, operated by American Airlines.(AA 2923)
Daily 22:00 Ronald Reagan Washington (DCA) 2 23:44 Portland (PWM)
AS 4599 Non-stop Airbus A319 (319) 1:44 Effective 2026-05-21 through 2026-07-01
Codeshare flight, operated by American Airlines.(AA 2978)
Daily 22:00 Ronald Reagan Washington (DCA) 2 23:41 Portland (PWM)
AS 4599 Non-stop Airbus A319 (319) 1:41 Effective 2026-09-09 through 2026-10-04
Codeshare flight, operated by American Airlines.(AA 2978)
Daily 22:00 Ronald Reagan Washington (DCA) 2 23:37 Portland (PWM)
AS 4599 Non-stop Airbus A319 (319) 1:37 Effective from 2026-10-05
Codeshare flight, operated by American Airlines.(AA 2978)
Mon-Fri,Sun 22:15 Ronald Reagan Washington (DCA) 2 23:50 Portland (PWM)
AS 4599 Non-stop Airbus A319 (319) 1:35 Effective 2026-03-18 through 2026-04-06
Codeshare flight, operated by American Airlines.(AA 1255)
This flight number is listed as serving the following routes:


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Alaska Airlines flight AS 4599: Multiple routes
Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Alaska Airlines AS4599
12:15
Phoenix Sky Harbor (PHX) 4

17:27
Saint Louis (STL) 1
Effective 2026-07-02 through 2026-08-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 6364)
Duration: 3:12, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4599
18:29
Saint Louis (STL) 1

19:55
Phoenix Sky Harbor (PHX) 4
Effective 2026-07-02 through 2026-08-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 6364)
Duration: 3:26, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4599
20:00
Ronald Reagan Washington (DCA) 2

21:37
Portland (PWM)
Effective 2026-01-10 through 2026-02-07
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by American Airlines. (AA 2923)
Duration: 1:37, non-stop
Airbus A319 (319)
Direct Codeshare Flights:
Alaska Airlines AS4599
22:00
Ronald Reagan Washington (DCA) 2

23:44
Portland (PWM)
Effective 2026-05-21 through 2026-07-01
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 2978)
Duration: 1:44, non-stop
Airbus A319 (319)
Direct Codeshare Flights:
Alaska Airlines AS4599
22:00
Ronald Reagan Washington (DCA) 2

23:41
Portland (PWM)
Effective 2026-09-09 through 2026-10-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 2978)
Duration: 1:41, non-stop
Airbus A319 (319)
Direct Codeshare Flights:
Alaska Airlines AS4599
22:00
Ronald Reagan Washington (DCA) 2

23:37
Portland (PWM)
Effective from 2026-10-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 2978)
Duration: 1:37, non-stop
Airbus A319 (319)
Direct Codeshare Flights:
Alaska Airlines AS4599
22:15
Ronald Reagan Washington (DCA) 2

23:50
Portland (PWM)
Effective 2026-03-18 through 2026-04-06
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by American Airlines. (AA 1255)
Duration: 1:35, non-stop
Airbus A319 (319)
This flight number is listed as serving the following routes:
  • Phoenix Sky Harbor (PHX) - Saint Louis (STL)
  • Ronald Reagan Washington (DCA) - Portland (PWM)
All Alaska Airlines flights
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