United Airlines flight UA 4559: Multiple routes

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FLIGHT SCHEDULE
Direct Flights:
Daily 09:30 Little Rock (LIT) 11:15 Houston George Bush (IAH)
UA 4559 Non-stop Canadair CRJ 550 (CR5) 1:45 Effective 2026-03-29 through 2026-04-29
Daily 10:35 Chicago O'Hare (ORD) 2 13:13 Louisville (SDF)
UA 4559 Non-stop Canadair CRJ 550 (CR5) 1:38 Valid until 2026-01-05
Daily 10:40 Chicago O'Hare (ORD) 2 13:00 Louisville (SDF)
UA 4559 Non-stop Canadair CRJ 550 (CR5) 1:20 Effective from 2026-04-30
Sun 13:46 Rochester (ROC) 14:55 Chicago O'Hare (ORD) 2
UA 4559 Non-stop Canadair CRJ 550 (CR5) 2:09 Effective 2026-03-08 through 2026-03-22
Sat 17:10 Washington Dulles (IAD) 18:54 Burlington (BTV)
UA 4559 Non-stop Canadair CRJ 550 (CR5) 1:44 Operates only on 2026-01-10
Mon-Fri,Sun 18:40 Saint Louis (STL) 1 20:23 Chicago O'Hare (ORD) 2
UA 4559 Non-stop Canadair CRJ 550 (CR5) 1:43 Effective 2026-01-06 through 2026-01-16
Mon-Fri,Sun 18:40 Saint Louis (STL) 1 20:23 Chicago O'Hare (ORD) 2
UA 4559 Non-stop Canadair CRJ 550 (CR5) 1:43 Effective 2026-01-19 through 2026-02-11
Daily 22:05 Washington Dulles (IAD) 23:44 Columbia (CAE)
UA 4559 Non-stop Canadair CRJ 550 (CR5) 1:39 Effective 2026-02-12 through 2026-03-04
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This flight number is listed as serving the following routes:


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United Airlines flight UA 4559: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
United Airlines UA4559
09:30
Little Rock (LIT)

11:15
Houston George Bush (IAH)
Effective 2026-03-29 through 2026-04-29
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:45, non-stop
Canadair CRJ 550 (CR5)
Direct Flights:
United Airlines UA4559
10:35
Chicago O'Hare (ORD) 2

13:13
Louisville (SDF)
Valid until 2026-01-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:38, non-stop
Canadair CRJ 550 (CR5)
Direct Flights:
United Airlines UA4559
10:40
Chicago O'Hare (ORD) 2

13:00
Louisville (SDF)
Effective from 2026-04-30
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:20, non-stop
Canadair CRJ 550 (CR5)
Direct Flights:
United Airlines UA4559
13:46
Rochester (ROC)

14:55
Chicago O'Hare (ORD) 2
Effective 2026-03-08 through 2026-03-22
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:09, non-stop
Canadair CRJ 550 (CR5)
Direct Flights:
United Airlines UA4559
17:10
Washington Dulles (IAD)

18:54
Burlington (BTV)
Operates only on 2026-01-10
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:44, non-stop
Canadair CRJ 550 (CR5)
Direct Flights:
United Airlines UA4559
18:40
Saint Louis (STL) 1

20:23
Chicago O'Hare (ORD) 2
Effective 2026-01-06 through 2026-01-16
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 1:43, non-stop
Canadair CRJ 550 (CR5)
Direct Flights:
United Airlines UA4559
18:40
Saint Louis (STL) 1

20:23
Chicago O'Hare (ORD) 2
Effective 2026-01-19 through 2026-02-11
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 1:43, non-stop
Canadair CRJ 550 (CR5)
Direct Flights:
United Airlines UA4559
22:05
Washington Dulles (IAD)

23:44
Columbia (CAE)
Effective 2026-02-12 through 2026-03-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:39, non-stop
Canadair CRJ 550 (CR5)
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This flight number is listed as serving the following routes:
  • Chicago O'Hare (ORD) - Louisville (SDF)
  • Little Rock (LIT) - Houston George Bush (IAH)
  • Rochester (ROC) - Chicago O'Hare (ORD)
  • Saint Louis (STL) - Chicago O'Hare (ORD)
  • Washington Dulles (IAD) - Burlington (BTV)
  • Washington Dulles (IAD) - Columbia (CAE)
All United Airlines flights
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