(UA) United Airlines 4257 Flight Details
Delayed by 1h 4m | Departed
Departure
IAD
Washington Dulles International Airport, VA, US
Flight Gate Times
27-Jan-2026
Scheduled
09:00
EST
Actual
08:53
EST
Total Departure Delay: -
Flight Runway Times
27-Jan-2026
Scheduled
09:21
EST
Actual
10:34
EST
Runway Delay: 1 h 13 mins
Terminal
-
Gate
A1
Craft Type
Embraer EMB-145XR
E45
Flight Time
Scheduled
1h 57m
Arrival
TYS
Knoxville McGhee Tyson Airport, TN, US
Flight Gate Times
27-Jan-2026
Scheduled
10:57
EST
Estimated
12:01
EST
Total Arrival Delay: 1 h 4 mins
Flight Runway Times
27-Jan-2026
Scheduled
10:53
EST
Estimated
11:57
EST
Runway Delay: 1 h 4 mins
Terminal
-
Gate
-
Baggage Claim
-
Tail Number
N14153
Flight Time
Estimated
3h 8m
Flight Notes
Operated by CommuteAir on behalf of United Airlines
Also marketed as (AC) Air Canada 4741, (AV) Avianca 2346, (CM) Copa Airlines 2237
Event Timeline
Date
Event
Data Updated
27 Jan
15:43
10:43
10:43
Time Adjustment
Estimated Runway Arrival changed from Jan-27-2026 11:45 AM to Jan-27-2026 11:57 AM
Departure Gate changed from 1 to A1
27 Jan
15:38
10:38
10:38
Time Adjustment
Estimated Runway Arrival changed from Jan-27-2026 11:39 AM to Jan-27-2026 11:45 AM
27 Jan
15:37
10:37
10:37
Time Adjustment
Estimated Runway Departure changed from Jan-27-2026 9:21 AM to Jan-27-2026 10:34 AM
Actual Runway Departure changed to Jan-27-2026 10:34 AM
Estimated Runway Arrival changed from Jan-27-2026 11:57 AM to Jan-27-2026 11:39 AM
27 Jan
15:32
10:32
10:32
Time Adjustment
Estimated Runway Departure changed from Jan-27-2026 10:17 AM to Jan-27-2026 9:21 AM
Estimated Runway Arrival changed from Jan-27-2026 10:57 AM to Jan-27-2026 11:57 AM
Estimated Gate Arrival changed from Jan-27-2026 10:57 AM to Jan-27-2026 12:01 PM
27 Jan
15:17
10:17
10:17
Time Adjustment
Estimated Runway Departure changed from Jan-27-2026 9:21 AM to Jan-27-2026 10:17 AM
27 Jan
15:02
10:02
10:02
Time Adjustment
Estimated Runway Departure changed from Jan-27-2026 10:02 AM to Jan-27-2026 9:21 AM
27 Jan
15:02
10:02
10:02
Time Adjustment
Estimated Runway Departure changed from Jan-27-2026 9:47 AM to Jan-27-2026 10:02 AM
27 Jan
14:47
09:47
09:47
Time Adjustment
Estimated Runway Departure changed from Jan-27-2026 9:21 AM to Jan-27-2026 9:47 AM
27 Jan
14:32
09:32
09:32
Time Adjustment
Estimated Runway Departure changed from Jan-27-2026 9:32 AM to Jan-27-2026 9:21 AM
Estimated Runway Arrival changed from Jan-27-2026 10:53 AM to Jan-27-2026 10:57 AM
27 Jan
14:32
09:32
09:32
Time Adjustment
Estimated Runway Departure changed from Jan-27-2026 9:21 AM to Jan-27-2026 9:32 AM
27 Jan
14:14
09:14
09:14
Status Active
Estimated Gate Departure changed from Jan-27-2026 9:00 AM to Jan-27-2026 8:53 AM
Actual Gate Departure changed to Jan-27-2026 8:53 AM
Status changed from Scheduled to Active
27 Jan
14:14
09:14
09:14
Time Adjustment
Estimated Runway Departure changed from Jan-27-2026 9:15 AM to Jan-27-2026 9:21 AM
27 Jan
12:08
07:08
07:08
Gate Adjustment
Departure Gate changed from A1 to 1
27 Jan
11:58
06:58
06:58
Time Adjustment
Scheduled Runway Departure changed from Jan-27-2026 9:21 AM to Jan-27-2026 9:21 AM
Scheduled Runway Arrival changed from Jan-27-2026 10:53 AM to Jan-27-2026 10:53 AM
27 Jan
11:58
06:58
06:58
Time Adjustment
Estimated Runway Arrival changed to Jan-27-2026 10:53 AM
27 Jan
11:58
06:58
06:58
Equipment Adjustment
Tail Number changed from N12135 to N14153
27 Jan
11:58
06:58
06:58
Time Adjustment
Estimated Runway Departure changed to Jan-27-2026 9:15 AM
Estimated Gate Departure changed from Jan-27-2026 9:00 AM to Jan-27-2026 9:00 AM
Estimated Gate Arrival changed from Jan-27-2026 10:57 AM to Jan-27-2026 10:57 AM
27 Jan
11:58
06:58
06:58
Gate Adjustment
Departure Gate changed from A2F to A1
27 Jan
03:19
22:19
22:19
Gate Adjustment
Departure Gate changed from A2E to A2F
27 Jan
03:13
22:13
22:13
Equipment Adjustment
Tail Number changed from N12136 to N12135
27 Jan
01:43
20:43
20:43
Equipment Adjustment
Tail Number changed from N11199 to N12136
26 Jan
16:01
11:01
11:01
Gate Adjustment
Departure Gate changed from A2F to A2E
26 Jan
14:06
09:06
09:06
Time Adjustment
Scheduled Runway Departure changed from Jan-27-2026 9:06 AM to Jan-27-2026 9:21 AM
Scheduled Runway Arrival changed from Jan-27-2026 10:20 AM to Jan-27-2026 10:53 AM
26 Jan
14:01
09:01
09:01
Time Adjustment
Scheduled Runway Departure changed to Jan-27-2026 9:06 AM
Scheduled Runway Arrival changed to Jan-27-2026 10:20 AM
26 Jan
02:25
21:25
21:25
Gate Adjustment
Departure Gate changed to A2F
25 Jan
15:31
10:31
10:31
Time Adjustment
Estimated Gate Departure changed to Jan-27-2026 9:00 AM
Estimated Gate Arrival changed to Jan-27-2026 10:57 AM
Tail Number changed to N11199
Actual Equipment changed to E45
24 Jan
18:43
13:43
13:43
Record Created
24 Jan
18:43
13:43
13:43
Time Adjustment
Scheduled Gate Departure changed to Jan-27-2026 9:00 AM
Scheduled Gate Arrival changed to Jan-27-2026 10:57 AM
Scheduled Equipment changed to ERJ