Alaska Airlines flight AS 4257: Multiple routes

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Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Daily 08:00 Chicago O'Hare (ORD) 3 10:53 Syracuse (SYR)
AS 4257 Non-stop Embraer EMB 175 (E75) 1:53 Effective from 2026-10-05
Codeshare flight, operated by American Airlines.(AA 3922)
Mon-Fri 08:12 Chicago O'Hare (ORD) 3 11:15 Syracuse (SYR)
AS 4257 Non-stop Embraer EMB 175 (E75) 2:03 Effective 2026-03-09 through 2026-04-06
Codeshare flight, operated by American Airlines.(AA 4666)
Sun 08:17 Chicago O'Hare (ORD) 3 11:20 Syracuse (SYR)
AS 4257 Non-stop Embraer EMB 175 (E75) 2:03 Effective 2026-03-08 through 2026-04-05
Codeshare flight, operated by American Airlines.(AA 4666)
Daily 11:29 Syracuse (SYR) 12:40 Chicago O'Hare (ORD) 3
AS 4257 Non-stop Embraer EMB 175 (E75) 2:11 Effective from 2026-10-05
Codeshare flight, operated by American Airlines.(AA 3922)
Mon-Fri 11:46 Syracuse (SYR) 13:09 Chicago O'Hare (ORD) 3
AS 4257 Non-stop Embraer EMB 175 (E75) 2:23 Effective 2026-03-09 through 2026-04-06
Codeshare flight, operated by American Airlines.(AA 4666)
Sun 11:50 Syracuse (SYR) 13:13 Chicago O'Hare (ORD) 3
AS 4257 Non-stop Embraer EMB 175 (E75) 2:23 Effective 2026-03-08 through 2026-04-05
Codeshare flight, operated by American Airlines.(AA 4666)
Daily 13:45 Philadelphia (PHL) 15:03 Chicago O'Hare (ORD) 3
AS 4257 Non-stop Airbus A320 (320) 2:18 Effective 2026-04-22 through 2026-05-20
Codeshare flight, operated by American Airlines.(AA 470)
Daily 14:15 Philadelphia (PHL) 15:39 Chicago O'Hare (ORD) 3
AS 4257 Non-stop Airbus A320 (320) 2:24 Effective 2026-05-21 through 2026-07-01
Codeshare flight, operated by American Airlines.(AA 470)
Daily 14:15 Philadelphia (PHL) 15:42 Chicago O'Hare (ORD) 3
AS 4257 Non-stop Airbus A320 (320) 2:27 Effective 2026-08-05 through 2026-09-08
Codeshare flight, operated by American Airlines.(AA 470)
Daily 14:15 Philadelphia (PHL) 15:40 Chicago O'Hare (ORD) 3
AS 4257 Non-stop Airbus A320 (320) 2:25 Effective 2026-09-09 through 2026-10-04
Codeshare flight, operated by American Airlines.(AA 470)
Mon-Thu,Sat,Sun 18:02 Los Angeles (LAX) 22:54 San Antonio (SAT)
AS 4257 Non-stop Embraer EMB 175 (E75) 2:52 Effective 2026-01-06 through 2026-01-17
Codeshare flight, operated by American Airlines.(AA 6196)
Mon-Thu,Sat,Sun 18:02 Los Angeles (LAX) 22:54 San Antonio (SAT)
AS 4257 Non-stop Embraer EMB 175 (E75) 2:52 Effective 2026-01-20 through 2026-02-11
Codeshare flight, operated by American Airlines.(AA 6196)
Mon 19:10 Chicago O'Hare (ORD) 3 21:43 Cleveland (CLE)
AS 4257 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:33 Operates only on 2026-01-05
Codeshare flight, operated by American Airlines.(AA 3569)
Sat 19:14 Fargo (FAR) 21:29 Chicago O'Hare (ORD) 3
AS 4257 Non-stop Embraer EMB 170 / EMB 175 (E70) 2:15 Valid until 2026-01-03
Codeshare flight, operated by American Airlines.(AA 3664)
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This flight number is listed as serving the following routes:


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Alaska Airlines flight AS 4257: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Alaska Airlines AS4257
08:00
Chicago O'Hare (ORD) 3

10:53
Syracuse (SYR)
Effective from 2026-10-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 3922)
Duration: 1:53, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4257
08:12
Chicago O'Hare (ORD) 3

11:15
Syracuse (SYR)
Effective 2026-03-09 through 2026-04-06
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Codeshare flight, operated by American Airlines. (AA 4666)
Duration: 2:03, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4257
08:17
Chicago O'Hare (ORD) 3

11:20
Syracuse (SYR)
Effective 2026-03-08 through 2026-04-05
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Codeshare flight, operated by American Airlines. (AA 4666)
Duration: 2:03, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4257
11:29
Syracuse (SYR)

12:40
Chicago O'Hare (ORD) 3
Effective from 2026-10-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 3922)
Duration: 2:11, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4257
11:46
Syracuse (SYR)

13:09
Chicago O'Hare (ORD) 3
Effective 2026-03-09 through 2026-04-06
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Codeshare flight, operated by American Airlines. (AA 4666)
Duration: 2:23, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4257
11:50
Syracuse (SYR)

13:13
Chicago O'Hare (ORD) 3
Effective 2026-03-08 through 2026-04-05
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Codeshare flight, operated by American Airlines. (AA 4666)
Duration: 2:23, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4257
13:45
Philadelphia (PHL)

15:03
Chicago O'Hare (ORD) 3
Effective 2026-04-22 through 2026-05-20
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 470)
Duration: 2:18, non-stop
Airbus A320 (320)
Direct Codeshare Flights:
Alaska Airlines AS4257
14:15
Philadelphia (PHL)

15:39
Chicago O'Hare (ORD) 3
Effective 2026-05-21 through 2026-07-01
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 470)
Duration: 2:24, non-stop
Airbus A320 (320)
Direct Codeshare Flights:
Alaska Airlines AS4257
14:15
Philadelphia (PHL)

15:42
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 470)
Duration: 2:27, non-stop
Airbus A320 (320)
Direct Codeshare Flights:
Alaska Airlines AS4257
14:15
Philadelphia (PHL)

15:40
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 470)
Duration: 2:25, non-stop
Airbus A320 (320)
Direct Codeshare Flights:
Alaska Airlines AS4257
18:02
Los Angeles (LAX)

22:54
San Antonio (SAT)
Effective 2026-01-06 through 2026-01-17
Mon
Tue
Wed
Thu
Fri
-
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 6196)
Duration: 2:52, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4257
18:02
Los Angeles (LAX)

22:54
San Antonio (SAT)
Effective 2026-01-20 through 2026-02-11
Mon
Tue
Wed
Thu
Fri
-
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 6196)
Duration: 2:52, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Alaska Airlines AS4257
19:10
Chicago O'Hare (ORD) 3

21:43
Cleveland (CLE)
Operates only on 2026-01-05
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by American Airlines. (AA 3569)
Duration: 1:33, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Codeshare Flights:
Alaska Airlines AS4257
19:14
Fargo (FAR)

21:29
Chicago O'Hare (ORD) 3
Valid until 2026-01-03
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by American Airlines. (AA 3664)
Duration: 2:15, non-stop
Embraer EMB 170 / EMB 175 (E70)
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This flight number is listed as serving the following routes:
  • Chicago O'Hare (ORD) - Cleveland (CLE)
  • Fargo (FAR) - Chicago O'Hare (ORD)
  • Los Angeles (LAX) - San Antonio (SAT)
  • Philadelphia (PHL) - Chicago O'Hare (ORD)
  • Syracuse (SYR) - Chicago O'Hare (ORD)
All Alaska Airlines flights
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