(UA) United Airlines 5251 Flight Details
On time | Scheduled
Departure
DEN
Denver International Airport, CO, US
Flight Gate Times
24-Dec-2025
Scheduled
19:15
MST
Estimated
19:15
MST
Total Departure Delay: -
Flight Runway Times
24-Dec-2025
Scheduled
19:34
MST
Actual
--
Runway Delay: -
Terminal
-
Gate
B50
Craft Type
Embraer 175
E75
Flight Time
Scheduled
1h 1m
Arrival
COS
Colorado Springs Airport, CO, US
Flight Gate Times
24-Dec-2025
Scheduled
20:16
MST
Estimated
20:16
MST
Total Arrival Delay: -
Flight Runway Times
24-Dec-2025
Scheduled
20:10
MST
Actual
--
Runway Delay: -
Terminal
-
Gate
7
Baggage Claim
5
Tail Number
N601UX
Flight Time
Estimated
1h 1m
Flight Notes
Operated by SkyWest Airlines on behalf of United Airlines
Also marketed as (AC) Air Canada 4178
Event Timeline
Date
Event
Data Updated
24 Dec
16:36
09:36
09:36
Gate Adjustment
Departure Gate changed from B71 to B50
24 Dec
13:43
06:43
06:43
Gate Adjustment
Departure Gate changed from B45 to B71
24 Dec
13:37
06:37
06:37
Equipment Adjustment
Tail Number changed from N213SY to N601UX
24 Dec
13:37
06:37
06:37
Equipment Adjustment
Tail Number changed from N601UX to N213SY
24 Dec
13:37
06:37
06:37
Equipment Adjustment
Tail Number changed from N213SY to N601UX
24 Dec
04:55
21:55
21:55
Gate Adjustment
Departure Gate changed from B65 to B45
24 Dec
02:21
19:21
19:21
Time Adjustment
Scheduled Runway Departure changed from Dec-24-2025 7:23 PM to Dec-24-2025 7:34 PM
Scheduled Runway Arrival changed from Dec-24-2025 7:38 PM to Dec-24-2025 8:10 PM
24 Dec
02:16
19:16
19:16
Time Adjustment
Scheduled Runway Departure changed to Dec-24-2025 7:23 PM
Scheduled Runway Arrival changed to Dec-24-2025 7:38 PM
23 Dec
18:01
11:01
11:01
Equipment Adjustment
Tail Number changed from N107SY to N213SY
23 Dec
13:19
06:19
06:19
Gate Adjustment
Departure Gate changed to B65
23 Dec
02:31
19:31
19:31
Equipment Adjustment
Tail Number changed from N209SY to N107SY
22 Dec
17:01
10:01
10:01
Equipment Adjustment
Tail Number changed from N117SY to N209SY
22 Dec
11:37
04:37
04:37
Gate Adjustment
Arrival Gate changed to 7
Baggage changed to 5
22 Dec
11:25
04:25
04:25
Equipment Adjustment
Tail Number changed from N121SY to N117SY
22 Dec
04:08
21:08
21:08
Time Adjustment
Estimated Gate Departure changed to Dec-24-2025 7:15 PM
Estimated Gate Arrival changed to Dec-24-2025 8:16 PM
Tail Number changed to N121SY
Actual Equipment changed to E75
21 Dec
18:44
11:44
11:44
Record Created
21 Dec
18:44
11:44
11:44
Time Adjustment
Scheduled Gate Departure changed to Dec-24-2025 7:15 PM
Scheduled Gate Arrival changed to Dec-24-2025 8:16 PM
Scheduled Equipment changed to E7W