United Airlines flight UA 4645: Multiple routes

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FLIGHT SCHEDULE
Direct Flights:
Mon-Sat 06:15 Appleton (ATW) 07:57 Chicago O'Hare (ORD) 2
UA 4645 Non-stop Canadair CRJ (CRJ) 1:42 Valid until 2026-01-05
Sun 06:15 Appleton (ATW) 07:56 Chicago O'Hare (ORD) 2
UA 4645 Non-stop Canadair CRJ 550 (CR5) 1:41 Operates only on 2026-01-04
Daily 10:40 Chicago O'Hare (ORD) 2 12:54 Fort Wayne (FWA)
UA 4645 Non-stop Canadair CRJ (CRJ) 1:14 Effective 2026-03-05 through 2026-03-28
Daily 10:40 Chicago O'Hare (ORD) 2 12:51 Fort Wayne (FWA)
UA 4645 Non-stop Canadair CRJ (CRJ) 1:11 Effective 2026-03-29 through 2026-04-29
Daily 10:45 Chicago O'Hare (ORD) 2 12:45 Fort Wayne (FWA)
UA 4645 Non-stop Canadair CRJ (CRJ) 1:00 Effective from 2026-10-25
Daily 10:48 Chicago O'Hare (ORD) 2 13:04 Fort Wayne (FWA)
UA 4645 Non-stop Canadair CRJ (CRJ) 1:16 Effective 2026-01-06 through 2026-02-03
Daily 10:48 Chicago O'Hare (ORD) 2 13:04 Fort Wayne (FWA)
UA 4645 Non-stop Canadair CRJ (CRJ) 1:16 Effective 2026-02-05 through 2026-02-11
Daily 10:50 Chicago O'Hare (ORD) 2 13:04 Fort Wayne (FWA)
UA 4645 Non-stop Canadair CRJ (CRJ) 1:14 Effective 2026-02-12 through 2026-03-04
Daily 10:55 Chicago O'Hare (ORD) 2 13:06 Fort Wayne (FWA)
UA 4645 Non-stop Canadair CRJ (CRJ) 1:11 Effective 2026-04-30 through 2026-05-20
Wed 13:25 Colorado Springs (COS) 14:33 Denver (DEN)
UA 4645 Non-stop Embraer EMB 175 (E7W) 1:08 Operates only on 2026-02-04
Daily 14:10 Chicago O'Hare (ORD) 2 17:31 Burlington (BTV)
UA 4645 Non-stop Embraer EMB 175 (E7W) 2:21 Effective 2026-05-21 through 2026-10-24
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This flight number is listed as serving the following routes:


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United Airlines flight UA 4645: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
United Airlines UA4645
06:15
Appleton (ATW)

07:57
Chicago O'Hare (ORD) 2
Valid until 2026-01-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
-
Duration: 1:42, non-stop
Canadair CRJ (CRJ)
Direct Flights:
United Airlines UA4645
06:15
Appleton (ATW)

07:56
Chicago O'Hare (ORD) 2
Operates only on 2026-01-04
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:41, non-stop
Canadair CRJ 550 (CR5)
Direct Flights:
United Airlines UA4645
10:40
Chicago O'Hare (ORD) 2

12:54
Fort Wayne (FWA)
Effective 2026-03-05 through 2026-03-28
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:14, non-stop
Canadair CRJ (CRJ)
Direct Flights:
United Airlines UA4645
10:40
Chicago O'Hare (ORD) 2

12:51
Fort Wayne (FWA)
Effective 2026-03-29 through 2026-04-29
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:11, non-stop
Canadair CRJ (CRJ)
Direct Flights:
United Airlines UA4645
10:45
Chicago O'Hare (ORD) 2

12:45
Fort Wayne (FWA)
Effective from 2026-10-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:00, non-stop
Canadair CRJ (CRJ)
Direct Flights:
United Airlines UA4645
10:48
Chicago O'Hare (ORD) 2

13:04
Fort Wayne (FWA)
Effective 2026-01-06 through 2026-02-03
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:16, non-stop
Canadair CRJ (CRJ)
Direct Flights:
United Airlines UA4645
10:48
Chicago O'Hare (ORD) 2

13:04
Fort Wayne (FWA)
Effective 2026-02-05 through 2026-02-11
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:16, non-stop
Canadair CRJ (CRJ)
Direct Flights:
United Airlines UA4645
10:50
Chicago O'Hare (ORD) 2

13:04
Fort Wayne (FWA)
Effective 2026-02-12 through 2026-03-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:14, non-stop
Canadair CRJ (CRJ)
Direct Flights:
United Airlines UA4645
10:55
Chicago O'Hare (ORD) 2

13:06
Fort Wayne (FWA)
Effective 2026-04-30 through 2026-05-20
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:11, non-stop
Canadair CRJ (CRJ)
Direct Flights:
United Airlines UA4645
13:25
Colorado Springs (COS)

14:33
Denver (DEN)
Operates only on 2026-02-04
Mon
-
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:08, non-stop
Embraer EMB 175 (E7W)
Direct Flights:
United Airlines UA4645
14:10
Chicago O'Hare (ORD) 2

17:31
Burlington (BTV)
Effective 2026-05-21 through 2026-10-24
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:21, non-stop
Embraer EMB 175 (E7W)
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This flight number is listed as serving the following routes:
  • Appleton (ATW) - Chicago O'Hare (ORD)
  • Chicago O'Hare (ORD) - Burlington (BTV)
  • Chicago O'Hare (ORD) - Fort Wayne (FWA)
  • Colorado Springs (COS) - Denver (DEN)
All United Airlines flights
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