Alaska Airlines flight AS 4559: Multiple routes

Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Daily 09:40 Chicago O'Hare (ORD) 3 12:39 San Antonio (SAT)
AS 4559 Non-stop Embraer EMB 175 (E75) 2:59 Effective 2026-09-09 through 2026-10-04
Codeshare flight, operated by American Airlines.(AA 4667)
Sun 11:27 Pittsburgh (PIT) 12:25 Chicago O'Hare (ORD) 3
AS 4559 Non-stop Embraer EMB 175 (E75) 1:58 Effective 2026-02-22 through 2026-03-01
Codeshare flight, operated by American Airlines.(AA 4678)
Mon,Thu-Sat 11:43 Pittsburgh (PIT) 12:41 Chicago O'Hare (ORD) 3
AS 4559 Non-stop Embraer EMB 175 (E75) 1:58 Effective 2026-02-12 through 2026-03-07
Codeshare flight, operated by American Airlines.(AA 4678)
Tue,Wed 12:00 Pittsburgh (PIT) 12:58 Chicago O'Hare (ORD) 3
AS 4559 Non-stop Embraer EMB 175 (E75) 1:58 Effective 2026-02-17 through 2026-03-04
Codeshare flight, operated by American Airlines.(AA 4678)
Sun 12:45 Pittsburgh (PIT) 13:43 Chicago O'Hare (ORD) 3
AS 4559 Non-stop Embraer EMB 175 (E75) 1:58 Operates only on 2026-02-15
Codeshare flight, operated by American Airlines.(AA 4678)
Mon,Tue,Thu,Sat,Sun 13:07 Pittsburgh (PIT) 14:04 Chicago O'Hare (ORD) 3
AS 4559 Non-stop Embraer EMB 175 (E75) 1:57 Valid until 2026-01-05
Codeshare flight, operated by American Airlines.(AA 4678)
Fri 13:13 Pittsburgh (PIT) 14:10 Chicago O'Hare (ORD) 3
AS 4559 Non-stop Embraer EMB 175 (E75) 1:57 Operates only on 2026-01-02
Codeshare flight, operated by American Airlines.(AA 4678)
Daily 13:13 San Antonio (SAT) 16:10 Chicago O'Hare (ORD) 3
AS 4559 Non-stop Embraer EMB 175 (E75) 2:57 Effective 2026-09-09 through 2026-10-04
Codeshare flight, operated by American Airlines.(AA 4667)
Daily 14:57 Chicago O'Hare (ORD) 3 17:41 San Antonio (SAT)
AS 4559 Non-stop Airbus A319 (319) 2:44 Effective 2026-08-05 through 2026-09-08
Codeshare flight, operated by American Airlines.(AA 2435)
Daily 18:24 San Antonio (SAT) 21:15 Chicago O'Hare (ORD) 3
AS 4559 Non-stop Airbus A319 (319) 2:51 Effective 2026-08-05 through 2026-09-08
Codeshare flight, operated by American Airlines.(AA 2435)
Daily 18:35 Philadelphia (PHL) F 20:01 Syracuse (SYR)
AS 4559 Non-stop Embraer ERJ 145 (ER4) 1:26 Effective 2026-05-21 through 2026-07-01
Codeshare flight, operated by American Airlines.(AA 5837)
Daily 18:35 Philadelphia (PHL) F 20:03 Syracuse (SYR)
AS 4559 Non-stop Embraer ERJ 145 (ER4) 1:28 Effective 2026-07-02 through 2026-08-04
Codeshare flight, operated by American Airlines.(AA 5837)
This flight number is listed as serving the following routes:


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Alaska Airlines flight AS 4559: Multiple routes
Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Alaska Airlines AS4559
09:40
Chicago O'Hare (ORD) 3

12:39
San Antonio (SAT)
Effective 2026-09-09 through 2026-10-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 4667)
Duration: 2:59, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4559
11:27
Pittsburgh (PIT)

12:25
Chicago O'Hare (ORD) 3
Effective 2026-02-22 through 2026-03-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Codeshare flight, operated by American Airlines. (AA 4678)
Duration: 1:58, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4559
11:43
Pittsburgh (PIT)

12:41
Chicago O'Hare (ORD) 3
Effective 2026-02-12 through 2026-03-07
Mon
Tue
-
Wed
-
Thu
Fri
Sat
Sun
-
Codeshare flight, operated by American Airlines. (AA 4678)
Duration: 1:58, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4559
12:00
Pittsburgh (PIT)

12:58
Chicago O'Hare (ORD) 3
Effective 2026-02-17 through 2026-03-04
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by American Airlines. (AA 4678)
Duration: 1:58, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4559
12:45
Pittsburgh (PIT)

13:43
Chicago O'Hare (ORD) 3
Operates only on 2026-02-15
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Codeshare flight, operated by American Airlines. (AA 4678)
Duration: 1:58, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4559
13:07
Pittsburgh (PIT)

14:04
Chicago O'Hare (ORD) 3
Valid until 2026-01-05
Mon
Tue
Wed
-
Thu
Fri
-
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 4678)
Duration: 1:57, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4559
13:13
Pittsburgh (PIT)

14:10
Chicago O'Hare (ORD) 3
Operates only on 2026-01-02
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Codeshare flight, operated by American Airlines. (AA 4678)
Duration: 1:57, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4559
13:13
San Antonio (SAT)

16:10
Chicago O'Hare (ORD) 3
Effective 2026-09-09 through 2026-10-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 4667)
Duration: 2:57, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4559
14:57
Chicago O'Hare (ORD) 3

17:41
San Antonio (SAT)
Effective 2026-08-05 through 2026-09-08
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 2435)
Duration: 2:44, non-stop
Airbus A319 (319)
Direct Codeshare Flights:
Alaska Airlines AS4559
18:24
San Antonio (SAT)

21:15
Chicago O'Hare (ORD) 3
Effective 2026-08-05 through 2026-09-08
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 2435)
Duration: 2:51, non-stop
Airbus A319 (319)
Direct Codeshare Flights:
Alaska Airlines AS4559
18:35
Philadelphia (PHL) F

20:01
Syracuse (SYR)
Effective 2026-05-21 through 2026-07-01
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 5837)
Duration: 1:26, non-stop
Embraer ERJ 145 (ER4)
Direct Codeshare Flights:
Alaska Airlines AS4559
18:35
Philadelphia (PHL) F

20:03
Syracuse (SYR)
Effective 2026-07-02 through 2026-08-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 5837)
Duration: 1:28, non-stop
Embraer ERJ 145 (ER4)
This flight number is listed as serving the following routes:
  • Chicago O'Hare (ORD) - San Antonio (SAT)
  • Philadelphia (PHL) - Syracuse (SYR)
  • Pittsburgh (PIT) - Chicago O'Hare (ORD)
All Alaska Airlines flights
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