(UA) United Airlines 5251 Flight Details
On time | Scheduled
Departure
DEN
Denver International Airport, CO, US
Flight Gate Times
29-Dec-2025
Scheduled
19:15
MST
Estimated
19:15
MST
Total Departure Delay: -
Flight Runway Times
29-Dec-2025
Scheduled
19:34
MST
Actual
--
Runway Delay: -
Terminal
-
Gate
B67
Craft Type
Embraer 175
E75
Flight Time
Scheduled
1h 1m
Arrival
COS
Colorado Springs Airport, CO, US
Flight Gate Times
29-Dec-2025
Scheduled
20:16
MST
Estimated
20:16
MST
Total Arrival Delay: -
Flight Runway Times
29-Dec-2025
Scheduled
20:10
MST
Actual
--
Runway Delay: -
Terminal
-
Gate
3
Baggage Claim
5
Tail Number
N156SY
Flight Time
Estimated
1h 1m
Flight Notes
Operated by SkyWest Airlines on behalf of United Airlines
Also marketed as (AC) Air Canada 4102
Event Timeline
Date
Event
Data Updated
29 Dec
02:21
19:21
19:21
Time Adjustment
Scheduled Runway Departure changed from Dec-29-2025 7:24 PM to Dec-29-2025 7:34 PM
Scheduled Runway Arrival changed from Dec-29-2025 7:39 PM to Dec-29-2025 8:10 PM
29 Dec
02:16
19:16
19:16
Time Adjustment
Scheduled Runway Departure changed to Dec-29-2025 7:24 PM
Scheduled Runway Arrival changed to Dec-29-2025 7:39 PM
29 Dec
02:01
19:01
19:01
Equipment Adjustment
Tail Number changed from N139SY to N156SY
28 Dec
13:19
06:19
06:19
Gate Adjustment
Departure Gate changed to B67
28 Dec
03:01
20:01
20:01
Equipment Adjustment
Tail Number changed from N118SY to N139SY
27 Dec
20:07
13:07
13:07
Equipment Adjustment
Tail Number changed from N109SY to N118SY
27 Dec
19:56
12:56
12:56
Gate Adjustment
Arrival Gate changed to 3
Baggage changed to 5
27 Dec
12:01
05:01
05:01
Equipment Adjustment
Tail Number changed from N151SY to N109SY
27 Dec
04:07
21:07
21:07
Time Adjustment
Estimated Gate Departure changed to Dec-29-2025 7:15 PM
Estimated Gate Arrival changed to Dec-29-2025 8:16 PM
Tail Number changed to N151SY
Actual Equipment changed to E75
26 Dec
18:49
11:49
11:49
Record Created
26 Dec
18:49
11:49
11:49
Time Adjustment
Scheduled Gate Departure changed to Dec-29-2025 7:15 PM
Scheduled Gate Arrival changed to Dec-29-2025 8:16 PM
Scheduled Equipment changed to E7W