(UA) United Airlines 4257 Flight Details
On time | Arrived
Departure
IAD
Washington Dulles International Airport, VA, US
Flight Gate Times
29-Nov-2025
Scheduled
09:00
EST
Actual
08:57
EST
Total Departure Delay: -
Flight Runway Times
29-Nov-2025
Scheduled
09:21
EST
Actual
09:17
EST
Runway Delay: -
Terminal
-
Gate
A3A
Craft Type
Embraer EMB-145XR
E45
Flight Time
Scheduled
1h 48m
Arrival
TYS
Knoxville McGhee Tyson Airport, TN, US
Flight Gate Times
29-Nov-2025
Scheduled
10:48
EST
Actual
10:33
EST
Total Arrival Delay: -
Flight Runway Times
29-Nov-2025
Scheduled
10:44
EST
Actual
10:26
EST
Runway Delay: -
Terminal
-
Gate
11
Baggage Claim
-
Tail Number
N21154
Flight Time
Actual
1h 36m
Flight Notes
Operated by CommuteAir on behalf of United Airlines
Also marketed as (AC) Air Canada 4741, (CM) Copa Airlines 2237
Event Timeline
Date
Event
Data Updated
29 Nov
15:36
10:36
10:36
Time Adjustment
Estimated Gate Arrival changed from Nov-29-2025 10:30 AM to Nov-29-2025 10:33 AM
Actual Gate Arrival changed to Nov-29-2025 10:33 AM
29 Nov
15:31
10:31
10:31
Time Adjustment
Estimated Gate Arrival changed from Nov-29-2025 10:47 AM to Nov-29-2025 10:30 AM
29 Nov
15:27
10:27
10:27
Status Landed
Estimated Runway Arrival changed from Nov-29-2025 10:43 AM to Nov-29-2025 10:26 AM
Actual Runway Arrival changed to Nov-29-2025 10:26 AM
Status changed from Active to Landed
29 Nov
14:19
09:19
09:19
Time Adjustment
Estimated Runway Arrival changed from Nov-29-2025 10:28 AM to Nov-29-2025 10:43 AM
Estimated Gate Arrival changed from Nov-29-2025 10:32 AM to Nov-29-2025 10:47 AM
29 Nov
14:17
09:17
09:17
Time Adjustment
Estimated Runway Departure changed from Nov-29-2025 9:18 AM to Nov-29-2025 9:17 AM
Actual Runway Departure changed to Nov-29-2025 9:17 AM
29 Nov
14:12
09:12
09:12
Time Adjustment
Estimated Runway Departure changed from Nov-29-2025 9:21 AM to Nov-29-2025 9:18 AM
Estimated Gate Arrival changed from Nov-29-2025 10:48 AM to Nov-29-2025 10:32 AM
Arrival Gate changed to 11
29 Nov
14:00
09:00
09:00
Status Active
Estimated Gate Departure changed from Nov-29-2025 9:00 AM to Nov-29-2025 8:57 AM
Actual Gate Departure changed to Nov-29-2025 8:57 AM
Estimated Gate Arrival changed from Nov-29-2025 10:32 AM to Nov-29-2025 10:48 AM
Status changed from Scheduled to Active
29 Nov
13:59
08:59
08:59
Time Adjustment
Estimated Runway Arrival changed from Nov-29-2025 10:44 AM to Nov-29-2025 10:28 AM
Estimated Gate Arrival changed from Nov-29-2025 10:48 AM to Nov-29-2025 10:32 AM
29 Nov
13:59
08:59
08:59
Time Adjustment
Estimated Runway Arrival changed to Nov-29-2025 10:44 AM
29 Nov
12:44
07:44
07:44
Time Adjustment
Estimated Runway Departure changed to Nov-29-2025 9:21 AM
28 Nov
18:30
13:30
13:30
Gate Adjustment
Departure Gate changed from A2E to A3A
28 Nov
18:18
13:18
13:18
Equipment Adjustment
Tail Number changed from N21129 to N21154
28 Nov
15:42
10:42
10:42
Gate Adjustment
Departure Gate changed from A4F to A2E
28 Nov
14:06
09:06
09:06
Gate Adjustment
Departure Gate changed from A4A to A4F
28 Nov
14:06
09:06
09:06
Time Adjustment
Scheduled Runway Departure changed from Nov-29-2025 9:05 AM to Nov-29-2025 9:21 AM
Scheduled Runway Arrival changed from Nov-29-2025 10:10 AM to Nov-29-2025 10:44 AM
28 Nov
14:01
09:01
09:01
Time Adjustment
Scheduled Runway Departure changed to Nov-29-2025 9:05 AM
Scheduled Runway Arrival changed to Nov-29-2025 10:10 AM
28 Nov
06:51
01:51
01:51
Equipment Adjustment
Tail Number changed from N14153 to N21129
28 Nov
02:21
21:21
21:21
Gate Adjustment
Departure Gate changed to A4A
27 Nov
06:51
01:51
01:51
Time Adjustment
Estimated Gate Departure changed to Nov-29-2025 9:00 AM
Estimated Gate Arrival changed to Nov-29-2025 10:48 AM
Tail Number changed to N14153
Actual Equipment changed to E45
26 Nov
18:45
13:45
13:45
Record Created
26 Nov
18:45
13:45
13:45
Time Adjustment
Scheduled Gate Departure changed to Nov-29-2025 9:00 AM
Scheduled Gate Arrival changed to Nov-29-2025 10:48 AM
Scheduled Equipment changed to ERJ