Alaska Airlines flight AS 4780: Multiple routes

FLIGHT SCHEDULE
Direct Codeshare Flights:
Daily 11:40 Chicago O'Hare (ORD) 3 13:14 Omaha (OMA) AS 4780 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:34 Effective 2026-06-10 through 2026-07-01 Codeshare flight, operated by American Airlines.(AA 3739)
Daily 11:40 Chicago O'Hare (ORD) 3 14:19 Rochester (ROC) AS 4780 Non-stop Embraer EMB 175 (E75) 1:39 Effective 2026-09-09 through 2026-10-04 Codeshare flight, operated by American Airlines.(AA 4080)
Daily 11:40 Chicago O'Hare (ORD) 3 13:15 Omaha (OMA) AS 4780 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:35 Effective from 2026-10-05 Codeshare flight, operated by American Airlines.(AA 3634)
Sat 13:42 Chicago O'Hare (ORD) 3 16:30 Rochester (ROC) AS 4780 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:48 Effective 2026-01-24 through 2026-02-07 Codeshare flight, operated by American Airlines.(AA 3765)
Sat 13:45 Chicago O'Hare (ORD) 3 16:33 Rochester (ROC) AS 4780 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:48 Operates only on 2026-01-10 Codeshare flight, operated by American Airlines.(AA 3765)
Daily 14:25 Omaha (OMA) 16:10 Chicago O'Hare (ORD) 3 AS 4780 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:45 Effective from 2026-10-05 Codeshare flight, operated by American Airlines.(AA 3634)
Daily 14:31 Omaha (OMA) 16:10 Chicago O'Hare (ORD) 3 AS 4780 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:39 Effective 2026-06-10 through 2026-07-01 Codeshare flight, operated by American Airlines.(AA 3739)
Mon-Fri,Sun 15:01 Chicago O'Hare (ORD) 3 17:49 Rochester (ROC) AS 4780 Non-stop Embraer EMB 175 (E75) 1:48 Effective 2026-01-11 through 2026-02-11 Codeshare flight, operated by American Airlines.(AA 3765)
Daily 15:02 Rochester (ROC) 16:10 Chicago O'Hare (ORD) 3 AS 4780 Non-stop Embraer EMB 175 (E75) 2:08 Effective 2026-09-09 through 2026-10-04 Codeshare flight, operated by American Airlines.(AA 4080)
Sat 17:02 Rochester (ROC) 18:27 Chicago O'Hare (ORD) 3 AS 4780 Non-stop Embraer EMB 170 / EMB 175 (E70) 2:25 Effective 2026-01-24 through 2026-02-07 Codeshare flight, operated by American Airlines.(AA 3765)
Sat 17:05 Rochester (ROC) 18:30 Chicago O'Hare (ORD) 3 AS 4780 Non-stop Embraer EMB 170 / EMB 175 (E70) 2:25 Operates only on 2026-01-10 Codeshare flight, operated by American Airlines.(AA 3765)
Daily 18:30 Chicago O'Hare (ORD) 3 21:18 Rochester (ROC) AS 4780 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:48 Effective 2026-04-07 through 2026-05-20 Codeshare flight, operated by American Airlines.(AA 3765)
Mon-Fri,Sun 18:35 Rochester (ROC) 19:56 Chicago O'Hare (ORD) 3 AS 4780 Non-stop Embraer EMB 175 (E75) 2:21 Effective 2026-01-11 through 2026-02-11 Codeshare flight, operated by American Airlines.(AA 3765)
Sat 18:59 Chicago O'Hare (ORD) 3 21:41 Rochester (ROC) AS 4780 Non-stop Embraer EMB 175 (E75) 1:42 Effective 2026-02-21 through 2026-03-07 Codeshare flight, operated by American Airlines.(AA 3765)
Daily 18:59 Chicago O'Hare (ORD) 3 21:53 Rochester (ROC) AS 4780 Non-stop Embraer EMB 175 (E75) 1:54 Effective 2026-03-08 through 2026-04-06 Codeshare flight, operated by American Airlines.(AA 3765)
Mon,Thu,Fri 19:06 Chicago O'Hare (ORD) 3 21:52 Rochester (ROC) AS 4780 Non-stop Embraer EMB 175 (E75) 1:46 Effective 2026-02-12 through 2026-02-20 Codeshare flight, operated by American Airlines.(AA 3765)
Mon,Thu,Fri,Sun 19:06 Chicago O'Hare (ORD) 3 21:52 Rochester (ROC) AS 4780 Non-stop Embraer EMB 175 (E75) 1:46 Effective 2026-02-22 through 2026-03-06 Codeshare flight, operated by American Airlines.(AA 3765)
Sun 20:46 Chicago O'Hare (ORD) 3 23:49 Rochester (ROC) AS 4780 Non-stop Embraer EMB 175 (E75) 2:03 Operates only on 2026-01-04 Codeshare flight, operated by American Airlines.(AA 4643)
Sat,Sun 20:50 Chicago O'Hare (ORD) 3 23:35 Rochester (ROC) AS 4780 Non-stop Embraer EMB 175 (E75) 1:45 Effective 2026-02-14 through 2026-02-15 Codeshare flight, operated by American Airlines.(AA 3765)
Tue,Wed 21:00 Chicago O'Hare (ORD) 3 23:45 Rochester (ROC) AS 4780 Non-stop Embraer EMB 175 (E75) 1:45 Effective 2026-02-17 through 2026-03-04 Codeshare flight, operated by American Airlines.(AA 3765)
Mon,Tue,Thu-Sat 21:15 Chicago O'Hare (ORD) 3 00:15 Rochester (ROC) AS 4780 Non-stop Embraer EMB 175 (E75) 2:00 Valid until 2026-01-05 Codeshare flight, operated by American Airlines.(AA 4643) The flight arrives 1 day after departure.

This flight number is listed as serving the following routes:

Chicago O'Hare (ORD) - Omaha (OMA)
Rochester (ROC) - Chicago O'Hare (ORD)

All Alaska Airlines flights

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Alaska Airlines flight AS 4780: Multiple routes

FLIGHT SCHEDULE

Direct Codeshare Flights:

Alaska Airlines AS4780

11:40

Chicago O'Hare (ORD) 3

13:14

Omaha (OMA)

Effective 2026-06-10 through 2026-07-01

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by American Airlines. (AA 3739)

Duration: 1:34, non-stop
Embraer EMB 170 / EMB 175 (E70)

Direct Codeshare Flights:

Alaska Airlines AS4780

11:40

Chicago O'Hare (ORD) 3

14:19

Rochester (ROC)

Effective 2026-09-09 through 2026-10-04

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by American Airlines. (AA 4080)

Duration: 1:39, non-stop
Embraer EMB 175 (E75)

Direct Codeshare Flights:

Alaska Airlines AS4780

11:40

Chicago O'Hare (ORD) 3

13:15

Omaha (OMA)

Effective from 2026-10-05

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by American Airlines. (AA 3634)

Duration: 1:35, non-stop
Embraer EMB 170 / EMB 175 (E70)

Direct Codeshare Flights:

Alaska Airlines AS4780

13:42

Chicago O'Hare (ORD) 3

16:30

Rochester (ROC)

Effective 2026-01-24 through 2026-02-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Codeshare flight, operated by American Airlines. (AA 3765)

Duration: 1:48, non-stop
Embraer EMB 170 / EMB 175 (E70)

Direct Codeshare Flights:

Alaska Airlines AS4780

13:45

Chicago O'Hare (ORD) 3

16:33

Rochester (ROC)

Operates only on 2026-01-10

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Codeshare flight, operated by American Airlines. (AA 3765)

Duration: 1:48, non-stop
Embraer EMB 170 / EMB 175 (E70)

Direct Codeshare Flights:

Alaska Airlines AS4780

14:25

Omaha (OMA)

16:10

Chicago O'Hare (ORD) 3

Effective from 2026-10-05

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by American Airlines. (AA 3634)

Duration: 1:45, non-stop
Embraer EMB 170 / EMB 175 (E70)

Direct Codeshare Flights:

Alaska Airlines AS4780

14:31

Omaha (OMA)

16:10

Chicago O'Hare (ORD) 3

Effective 2026-06-10 through 2026-07-01

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by American Airlines. (AA 3739)

Duration: 1:39, non-stop
Embraer EMB 170 / EMB 175 (E70)

Direct Codeshare Flights:

Alaska Airlines AS4780

15:01

Chicago O'Hare (ORD) 3

17:49

Rochester (ROC)

Effective 2026-01-11 through 2026-02-11

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun

Codeshare flight, operated by American Airlines. (AA 3765)

Duration: 1:48, non-stop
Embraer EMB 175 (E75)

Direct Codeshare Flights:

Alaska Airlines AS4780

15:02

Rochester (ROC)

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 4080)

Duration: 2:08, non-stop
Embraer EMB 175 (E75)

Direct Codeshare Flights:

Alaska Airlines AS4780

17:02

Rochester (ROC)

18:27

Chicago O'Hare (ORD) 3

Effective 2026-01-24 through 2026-02-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Codeshare flight, operated by American Airlines. (AA 3765)

Duration: 2:25, non-stop
Embraer EMB 170 / EMB 175 (E70)

Direct Codeshare Flights:

Alaska Airlines AS4780

17:05

Rochester (ROC)

18:30

Chicago O'Hare (ORD) 3

Operates only on 2026-01-10

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Codeshare flight, operated by American Airlines. (AA 3765)

Duration: 2:25, non-stop
Embraer EMB 170 / EMB 175 (E70)

Direct Codeshare Flights:

Alaska Airlines AS4780

18:30

Chicago O'Hare (ORD) 3

21:18

Rochester (ROC)

Effective 2026-04-07 through 2026-05-20

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by American Airlines. (AA 3765)

Duration: 1:48, non-stop
Embraer EMB 170 / EMB 175 (E70)

Direct Codeshare Flights:

Alaska Airlines AS4780

18:35

Rochester (ROC)

19:56

Chicago O'Hare (ORD) 3

Effective 2026-01-11 through 2026-02-11

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun

Codeshare flight, operated by American Airlines. (AA 3765)

Duration: 2:21, non-stop
Embraer EMB 175 (E75)

Direct Codeshare Flights:

Alaska Airlines AS4780

18:59

Chicago O'Hare (ORD) 3

21:41

Rochester (ROC)

Effective 2026-02-21 through 2026-03-07

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Codeshare flight, operated by American Airlines. (AA 3765)

Duration: 1:42, non-stop
Embraer EMB 175 (E75)

Direct Codeshare Flights:

Alaska Airlines AS4780

18:59

Chicago O'Hare (ORD) 3

21:53

Rochester (ROC)

Effective 2026-03-08 through 2026-04-06

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by American Airlines. (AA 3765)

Duration: 1:54, non-stop
Embraer EMB 175 (E75)

Direct Codeshare Flights:

Alaska Airlines AS4780

19:06

Chicago O'Hare (ORD) 3

21:52

Rochester (ROC)

Effective 2026-02-12 through 2026-02-20

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Codeshare flight, operated by American Airlines. (AA 3765)

Duration: 1:46, non-stop
Embraer EMB 175 (E75)

Direct Codeshare Flights:

Alaska Airlines AS4780

19:06

Chicago O'Hare (ORD) 3

21:52

Rochester (ROC)

Effective 2026-02-22 through 2026-03-06

Mon

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun

Codeshare flight, operated by American Airlines. (AA 3765)

Duration: 1:46, non-stop
Embraer EMB 175 (E75)

Direct Codeshare Flights:

Alaska Airlines AS4780

20:46

Chicago O'Hare (ORD) 3

23:49

Rochester (ROC)

Operates only on 2026-01-04

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Codeshare flight, operated by American Airlines. (AA 4643)

Duration: 2:03, non-stop
Embraer EMB 175 (E75)

Direct Codeshare Flights:

Alaska Airlines AS4780

20:50

Chicago O'Hare (ORD) 3

23:35

Rochester (ROC)

Effective 2026-02-14 through 2026-02-15

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun

Codeshare flight, operated by American Airlines. (AA 3765)

Duration: 1:45, non-stop
Embraer EMB 175 (E75)

Direct Codeshare Flights:

Alaska Airlines AS4780

21:00

Chicago O'Hare (ORD) 3

23:45

Rochester (ROC)

Effective 2026-02-17 through 2026-03-04

Mon
-

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Codeshare flight, operated by American Airlines. (AA 3765)

Duration: 1:45, non-stop
Embraer EMB 175 (E75)

Direct Codeshare Flights:

Alaska Airlines AS4780

21:15

Chicago O'Hare (ORD) 3

00:15(+1)

Rochester (ROC)

Valid until 2026-01-05

Mon

Tue

Wed
-

Thu

Fri

Sat

Sun
-

Codeshare flight, operated by American Airlines. (AA 4643)

Duration: 2:00, non-stop
Embraer EMB 175 (E75)
The flight arrives 1 day after departure.

This flight number is listed as serving the following routes:

Chicago O'Hare (ORD) - Omaha (OMA)
Rochester (ROC) - Chicago O'Hare (ORD)

All Alaska Airlines flights

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