United Airlines flight UA 521: Multiple routes

Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Tue,Sun 11:35 Denver (DEN) 12:23 Colorado Springs (COS)
UA 521 Non-stop Boeing 737 MAX 8 (7M8) 0:48 Effective 2024-01-09 through 2024-01-14
Mon-Fri 11:35 Denver (DEN) 12:23 Colorado Springs (COS)
UA 521 Non-stop Boeing 737-800 (738) 0:48 Effective 2024-01-10 through 2024-02-14
Sun 11:35 Denver (DEN) 12:23 Colorado Springs (COS)
UA 521 Non-stop Boeing 737 MAX 8 (7M8) 0:48 Effective 2024-01-21 through 2024-02-11
Sat 11:40 Denver (DEN) 12:28 Colorado Springs (COS)
UA 521 Non-stop Boeing 737-900 (739) 0:48 Effective 2024-01-13 through 2024-02-10
Mon-Fri,Sun 11:40 Denver (DEN) 12:30 Colorado Springs (COS)
UA 521 Non-stop Boeing 737-800 (738) 0:50 Effective 2024-03-07 through 2024-03-29
Daily 11:45 Denver (DEN) 12:34 Colorado Springs (COS)
UA 521 Non-stop Boeing 737-800 (738) 0:49 Effective 2024-02-15 through 2024-03-06
Daily 12:29 Boise (BOI) 16:53 O'Hare, Chicago (ORD) 1
UA 521 Non-stop Airbus A319 (319) 3:24 Effective from 2024-05-23
Tue-Fri 12:31 Boise (BOI) 16:55 O'Hare, Chicago (ORD) 1
UA 521 Non-stop Airbus A319 (319) 3:24 Valid until 2024-01-05
Mon,Sat 12:46 Boise (BOI) 17:10 O'Hare, Chicago (ORD) 1
UA 521 Non-stop Airbus A320 (320) 3:24 Valid until 2024-01-01
Sat 12:46 Boise (BOI) 17:10 O'Hare, Chicago (ORD) 1
UA 521 Non-stop Airbus A319 (319) 3:24 Operates only on 2024-01-06
Mon,Sun 12:46 Boise (BOI) 17:10 O'Hare, Chicago (ORD) 1
UA 521 Non-stop Airbus A320 (320) 3:24 Effective 2024-01-07 through 2024-01-08
Daily 13:39 Denver (DEN) 14:27 Colorado Springs (COS)
UA 521 Non-stop Boeing 737-900 (739) 0:48 Effective 2024-03-31 through 2024-05-22
Sat 20:00 O'Hare, Chicago (ORD) 1 23:49 Tampa (TPA)
UA 521 Non-stop Boeing 737 MAX 9 (7M9) 2:49 Effective 2024-03-09 through 2024-03-30
Sun 20:05 O'Hare, Chicago (ORD) 1 23:57 Orlando (MCO) B
UA 521 Non-stop Boeing 737 MAX 9 (7M9) 2:52 Operates only on 2024-01-07
Mon 20:19 O'Hare, Chicago (ORD) 1 00:11 Orlando (MCO) B
UA 521 Non-stop Boeing 737 MAX 8 (7M8) 2:52 Operates only on 2024-01-08
The flight arrives 1 day after departure.
Non-Direct Flights:
Sun 12:46 Boise (BOI) 23:57 Orlando (MCO) B
UA 521 1-stop Airbus A320 (320) 9:11 Operates only on 2024-01-07
Mon 12:46 Boise (BOI) 00:11 Orlando (MCO) B
UA 521 1-stop Airbus A320 (320) 9:25 Operates only on 2024-01-08
The flight arrives 1 day after departure.
This flight number is listed as serving the following routes:


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United Airlines flight UA 521: Multiple routes
Select flight date:
FLIGHT SCHEDULE
Direct Flights:
United Airlines UA521
11:35
Denver (DEN)

12:23
Colorado Springs (COS)
Effective 2024-01-09 through 2024-01-14
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 0:48, non-stop
Boeing 737 MAX 8 (7M8)
United Airlines UA521
11:35
Denver (DEN)

12:23
Colorado Springs (COS)
Effective 2024-01-10 through 2024-02-14
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 0:48, non-stop
Boeing 737-800 (738)
United Airlines UA521
11:35
Denver (DEN)

12:23
Colorado Springs (COS)
Effective 2024-01-21 through 2024-02-11
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 0:48, non-stop
Boeing 737 MAX 8 (7M8)
United Airlines UA521
11:40
Denver (DEN)

12:28
Colorado Springs (COS)
Effective 2024-01-13 through 2024-02-10
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 0:48, non-stop
Boeing 737-900 (739)
United Airlines UA521
11:40
Denver (DEN)

12:30
Colorado Springs (COS)
Effective 2024-03-07 through 2024-03-29
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 0:50, non-stop
Boeing 737-800 (738)
United Airlines UA521
11:45
Denver (DEN)

12:34
Colorado Springs (COS)
Effective 2024-02-15 through 2024-03-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 0:49, non-stop
Boeing 737-800 (738)
United Airlines UA521
12:29
Boise (BOI)

16:53
O'Hare, Chicago (ORD) 1
Effective from 2024-05-23
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 3:24, non-stop
Airbus A319 (319)
United Airlines UA521
12:31
Boise (BOI)

16:55
O'Hare, Chicago (ORD) 1
Valid until 2024-01-05
Mon
-
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 3:24, non-stop
Airbus A319 (319)
United Airlines UA521
12:46
Boise (BOI)

17:10
O'Hare, Chicago (ORD) 1
Valid until 2024-01-01
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 3:24, non-stop
Airbus A320 (320)
United Airlines UA521
12:46
Boise (BOI)

17:10
O'Hare, Chicago (ORD) 1
Operates only on 2024-01-06
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 3:24, non-stop
Airbus A319 (319)
United Airlines UA521
12:46
Boise (BOI)

17:10
O'Hare, Chicago (ORD) 1
Effective 2024-01-07 through 2024-01-08
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:24, non-stop
Airbus A320 (320)
United Airlines UA521
13:39
Denver (DEN)

14:27
Colorado Springs (COS)
Effective 2024-03-31 through 2024-05-22
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 0:48, non-stop
Boeing 737-900 (739)
United Airlines UA521
20:00
O'Hare, Chicago (ORD) 1

23:49
Tampa (TPA)
Effective 2024-03-09 through 2024-03-30
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 2:49, non-stop
Boeing 737 MAX 9 (7M9)
United Airlines UA521
20:05
O'Hare, Chicago (ORD) 1

23:57
Orlando (MCO) B
Operates only on 2024-01-07
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 2:52, non-stop
Boeing 737 MAX 9 (7M9)
United Airlines UA521
20:19
O'Hare, Chicago (ORD) 1

00:11(+1)
Orlando (MCO) B
Operates only on 2024-01-08
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:52, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.
Non-Direct Flights:
United Airlines UA521
12:46
Boise (BOI)

23:57
Orlando (MCO) B
Operates only on 2024-01-07
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 9:11, 1-stop
Airbus A320 (320)
United Airlines UA521
12:46
Boise (BOI)

00:11(+1)
Orlando (MCO) B
Operates only on 2024-01-08
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 9:25, 1-stop
Airbus A320 (320)
The flight arrives 1 day after departure.
This flight number is listed as serving the following routes:
  • Boise (BOI) - O'Hare, Chicago (ORD)
  • Boise (BOI) - Orlando (MCO)
  • Denver (DEN) - Colorado Springs (COS)
  • O'Hare, Chicago (ORD) - Orlando (MCO)
  • O'Hare, Chicago (ORD) - Tampa (TPA)
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