Iberia flight IB 4321: Multiple routes

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FLIGHT SCHEDULE
Direct Codeshare Flights:
Sat 11:53 Kansas City (MCI) 13:36 Chicago O'Hare (ORD) 3
IB 4321 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:43 Effective 2026-02-14 through 2026-03-07
Codeshare flight, operated by American Airlines.(AA 4189)
Sat 12:00 Kansas City (MCI) 13:43 Chicago O'Hare (ORD) 3
IB 4321 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:43 Effective 2026-03-14 through 2026-03-28
Codeshare flight, operated by American Airlines.(AA 3763)
Tue,Thu,Fri,Sun 12:30 Kansas City (MCI) 14:12 Chicago O'Hare (ORD) 3
IB 4321 Non-stop Embraer EMB 175 (E75) 1:42 Effective 2026-02-12 through 2026-02-22
Codeshare flight, operated by American Airlines.(AA 4189)
Mon-Fri,Sun 12:30 Kansas City (MCI) 14:12 Chicago O'Hare (ORD) 3
IB 4321 Non-stop Embraer EMB 175 (E75) 1:42 Effective 2026-02-23 through 2026-03-06
Codeshare flight, operated by American Airlines.(AA 4189)
Mon-Fri,Sun 12:40 Kansas City (MCI) 14:20 Chicago O'Hare (ORD) 3
IB 4321 Non-stop Embraer EMB 175 (E75) 1:40 Effective 2026-03-08 through 2026-03-27
Codeshare flight, operated by American Airlines.(AA 3763)
Daily 16:17 Springfield (SGF) 18:00 Chicago O'Hare (ORD) 3
IB 4321 Non-stop Canadair CRJ 700 (CR7) 1:43 Effective 2026-04-07 through 2026-05-20
Codeshare flight, operated by American Airlines.(AA 6379)
Daily 19:14 Louisville (SDF) 19:50 Chicago O'Hare (ORD) 3
IB 4321 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:36 Effective 2026-10-05 through 2026-10-23
Codeshare flight, operated by American Airlines.(AA 3588)
Tue,Fri,Sun 19:14 Louisville (SDF) 19:50 Chicago O'Hare (ORD) 3
IB 4321 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:36 Effective from 2026-10-25
Codeshare flight, operated by American Airlines.(AA 3588)
Daily 19:15 Louisville (SDF) 19:50 Chicago O'Hare (ORD) 3
IB 4321 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:35 Effective 2026-07-02 through 2026-09-08
Codeshare flight, operated by American Airlines.(AA 3796)
Tue,Thu,Sat 19:15 Louisville (SDF) 19:50 Chicago O'Hare (ORD) 3
IB 4321 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:35 Effective 2026-09-10 through 2026-09-29
Codeshare flight, operated by American Airlines.(AA 3796)
Daily 19:16 Louisville (SDF) 19:50 Chicago O'Hare (ORD) 3
IB 4321 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:34 Effective 2026-05-21 through 2026-07-01
Codeshare flight, operated by American Airlines.(AA 3785)
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This flight number is listed as serving the following routes:


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Iberia flight IB 4321: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Iberia IB4321
11:53
Kansas City (MCI)

13:36
Chicago O'Hare (ORD) 3
Effective 2026-02-14 through 2026-03-07
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by American Airlines. (AA 4189)
Duration: 1:43, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Codeshare Flights:
Iberia IB4321
12:00
Kansas City (MCI)

13:43
Chicago O'Hare (ORD) 3
Effective 2026-03-14 through 2026-03-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by American Airlines. (AA 3763)
Duration: 1:43, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Codeshare Flights:
Iberia IB4321
12:30
Kansas City (MCI)

14:12
Chicago O'Hare (ORD) 3
Effective 2026-02-12 through 2026-02-22
Mon
-
Tue
Wed
-
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by American Airlines. (AA 4189)
Duration: 1:42, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Iberia IB4321
12:30
Kansas City (MCI)

14:12
Chicago O'Hare (ORD) 3
Effective 2026-02-23 through 2026-03-06
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by American Airlines. (AA 4189)
Duration: 1:42, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Iberia IB4321
12:40
Kansas City (MCI)

14:20
Chicago O'Hare (ORD) 3
Effective 2026-03-08 through 2026-03-27
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by American Airlines. (AA 3763)
Duration: 1:40, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Iberia IB4321
16:17
Springfield (SGF)

18:00
Chicago O'Hare (ORD) 3
Effective 2026-04-07 through 2026-05-20
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 6379)
Duration: 1:43, non-stop
Canadair CRJ 700 (CR7)
Direct Codeshare Flights:
Iberia IB4321
19:14
Louisville (SDF)

19:50
Chicago O'Hare (ORD) 3
Effective 2026-10-05 through 2026-10-23
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 3588)
Duration: 1:36, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Codeshare Flights:
Iberia IB4321
19:14
Louisville (SDF)

19:50
Chicago O'Hare (ORD) 3
Effective from 2026-10-25
Mon
-
Tue
Wed
-
Thu
-
Fri
Sat
-
Sun
Codeshare flight, operated by American Airlines. (AA 3588)
Duration: 1:36, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Codeshare Flights:
Iberia IB4321
19:15
Louisville (SDF)

19:50
Chicago O'Hare (ORD) 3
Effective 2026-07-02 through 2026-09-08
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 3796)
Duration: 1:35, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Codeshare Flights:
Iberia IB4321
19:15
Louisville (SDF)

19:50
Chicago O'Hare (ORD) 3
Effective 2026-09-10 through 2026-09-29
Mon
-
Tue
Wed
-
Thu
Fri
-
Sat
Sun
-
Codeshare flight, operated by American Airlines. (AA 3796)
Duration: 1:35, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Codeshare Flights:
Iberia IB4321
19:16
Louisville (SDF)

19:50
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 3785)
Duration: 1:34, non-stop
Embraer EMB 170 / EMB 175 (E70)
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This flight number is listed as serving the following routes:
  • Kansas City (MCI) - Chicago O'Hare (ORD)
  • Louisville (SDF) - Chicago O'Hare (ORD)
  • Springfield (SGF) - Chicago O'Hare (ORD)
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