(UA) United Airlines 4257 Flight Details
Delayed by 3h 38m | Departed
Departure
IAD
Washington Dulles International Airport, VA, US
Flight Gate Times
28-Jan-2026
Scheduled
09:00
EST
Actual
12:50
EST
Total Departure Delay: 3 h 50 mins
Flight Runway Times
28-Jan-2026
Scheduled
09:21
EST
Actual
13:16
EST
Runway Delay: 3 h 55 mins
Terminal
-
Gate
A5B
Craft Type
Embraer EMB-145XR
E45
Flight Time
Scheduled
1h 57m
Arrival
TYS
Knoxville McGhee Tyson Airport, TN, US
Flight Gate Times
28-Jan-2026
Scheduled
10:57
EST
Estimated
14:35
EST
Total Arrival Delay: 3 h 38 mins
Flight Runway Times
28-Jan-2026
Scheduled
10:53
EST
Estimated
14:31
EST
Runway Delay: 3 h 38 mins
Terminal
-
Gate
7
Baggage Claim
-
Tail Number
N12175
Flight Time
Estimated
1h 45m
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
28 Jan
18:44
13:44
13:44
Time Adjustment
Estimated Gate Departure changed from Jan-28-2026 12:49 PM to Jan-28-2026 12:50 PM
Actual Gate Departure changed from Jan-28-2026 12:49 PM to Jan-28-2026 12:50 PM
Estimated Runway Arrival changed from Jan-28-2026 2:37 PM to Jan-28-2026 2:31 PM
Estimated Gate Arrival changed from Jan-28-2026 2:41 PM to Jan-28-2026 2:35 PM
28 Jan
18:44
13:44
13:44
Time Adjustment
Estimated Runway Departure changed from Jan-28-2026 1:15 PM to Jan-28-2026 1:16 PM
Actual Runway Departure changed from Jan-28-2026 1:15 PM to Jan-28-2026 1:16 PM
28 Jan
18:20
13:20
13:20
Time Adjustment
Estimated Runway Departure changed from Jan-28-2026 1:16 PM to Jan-28-2026 1:15 PM
Actual Runway Departure changed from Jan-28-2026 1:16 PM to Jan-28-2026 1:15 PM
Estimated Runway Arrival changed from Jan-28-2026 2:26 PM to Jan-28-2026 2:37 PM
Estimated Gate Arrival changed from Jan-28-2026 3:02 PM to Jan-28-2026 2:41 PM
28 Jan
18:18
13:18
13:18
Time Adjustment
Estimated Runway Arrival changed from Jan-28-2026 2:21 PM to Jan-28-2026 2:26 PM
28 Jan
18:17
13:17
13:17
Time Adjustment
Estimated Runway Departure changed from Jan-28-2026 1:26 PM to Jan-28-2026 1:16 PM
Actual Runway Departure changed to Jan-28-2026 1:16 PM
Estimated Runway Arrival changed to Jan-28-2026 2:21 PM
28 Jan
18:08
13:08
13:08
Time Adjustment
Estimated Gate Departure changed from Jan-28-2026 12:56 PM to Jan-28-2026 12:49 PM
Actual Gate Departure changed from Jan-28-2026 12:56 PM to Jan-28-2026 12:49 PM
28 Jan
18:03
13:03
13:03
Time Adjustment
Estimated Gate Departure changed from Jan-28-2026 12:50 PM to Jan-28-2026 12:56 PM
Actual Gate Departure changed from Jan-28-2026 12:50 PM to Jan-28-2026 12:56 PM
28 Jan
18:02
13:02
13:02
Status Active
Estimated Gate Departure changed from Jan-28-2026 1:05 PM to Jan-28-2026 12:50 PM
Actual Gate Departure changed to Jan-28-2026 12:50 PM
Status changed from Scheduled to Active
28 Jan
17:38
12:38
12:38
Time Adjustment
Estimated Gate Departure changed from Jan-28-2026 12:45 PM to Jan-28-2026 1:05 PM
Estimated Gate Arrival changed from Jan-28-2026 2:42 PM to Jan-28-2026 3:02 PM
28 Jan
17:34
12:34
12:34
Time Adjustment
Estimated Runway Departure changed from Jan-28-2026 1:06 PM to Jan-28-2026 1:26 PM
28 Jan
17:32
12:32
12:32
Time Adjustment
Estimated Gate Departure changed from Jan-28-2026 12:25 PM to Jan-28-2026 12:45 PM
Estimated Gate Arrival changed from Jan-28-2026 2:22 PM to Jan-28-2026 2:42 PM
28 Jan
17:28
12:28
12:28
Time Adjustment
Estimated Runway Departure changed from Jan-28-2026 12:46 PM to Jan-28-2026 1:06 PM
28 Jan
16:57
11:57
11:57
Gate Adjustment
Arrival Gate changed from 11 to 7
28 Jan
16:39
11:39
11:39
Time Adjustment
Estimated Gate Departure changed from Jan-28-2026 11:45 AM to Jan-28-2026 12:25 PM
Estimated Gate Arrival changed from Jan-28-2026 1:42 PM to Jan-28-2026 2:22 PM
28 Jan
16:38
11:38
11:38
Time Adjustment
Estimated Runway Departure changed from Jan-28-2026 12:06 PM to Jan-28-2026 12:46 PM
28 Jan
15:20
10:20
10:20
Gate Adjustment
Departure Gate changed from A6A to A5B
28 Jan
15:15
10:15
10:15
Equipment Adjustment
Tail Number changed from N14158 to N12175
28 Jan
15:08
10:08
10:08
Equipment Adjustment
Tail Number changed from N11199 to N14158
28 Jan
13:39
08:39
08:39
Gate Adjustment
Departure Gate changed from A5B to A6A
28 Jan
13:37
08:37
08:37
Time Adjustment
Estimated Runway Departure changed from Jan-28-2026 9:21 AM to Jan-28-2026 12:06 PM
28 Jan
13:37
08:37
08:37
Time Adjustment
Estimated Gate Departure changed from Jan-28-2026 9:00 AM to Jan-28-2026 11:45 AM
Estimated Gate Arrival changed from Jan-28-2026 10:57 AM to Jan-28-2026 1:42 PM
28 Jan
13:27
08:27
08:27
Equipment Adjustment
Tail Number changed from N12175 to N11199
28 Jan
12:21
07:21
07:21
Time Adjustment
Estimated Runway Departure changed to Jan-28-2026 9:21 AM
28 Jan
11:56
06:56
06:56
Gate Adjustment
Departure Gate changed from A4F to A5B
28 Jan
11:56
06:56
06:56
Equipment Adjustment
Tail Number changed from N11164 to N12175
28 Jan
11:32
06:32
06:32
Gate Adjustment
Arrival Gate changed to 11
28 Jan
07:19
02:19
02:19
Gate Adjustment
Departure Gate changed from A6C to A4F
27 Jan
22:55
17:55
17:55
Gate Adjustment
Departure Gate changed from A2E to A6C
27 Jan
18:13
13:13
13:13
Gate Adjustment
Departure Gate changed from A4E to A2E
27 Jan
18:11
13:11
13:11
Gate Adjustment
Departure Gate changed from A2F to A4E
27 Jan
18:07
13:07
13:07
Equipment Adjustment
Tail Number changed from N24128 to N11164
27 Jan
18:01
13:01
13:01
Gate Adjustment
Departure Gate changed from A4E to A2F
27 Jan
18:01
13:01
13:01
Equipment Adjustment
Tail Number changed from N11150 to N24128
27 Jan
17:55
12:55
12:55
Gate Adjustment
Departure Gate changed from A4F to A4E
27 Jan
14:06
09:06
09:06
Time Adjustment
Scheduled Runway Departure changed from Jan-28-2026 9:06 AM to Jan-28-2026 9:21 AM
Scheduled Runway Arrival changed from Jan-28-2026 10:13 AM to Jan-28-2026 10:53 AM
27 Jan
14:01
09:01
09:01
Time Adjustment
Scheduled Runway Departure changed to Jan-28-2026 9:06 AM
Scheduled Runway Arrival changed to Jan-28-2026 10:13 AM
27 Jan
12:37
07:37
07:37
Gate Adjustment
Departure Gate changed from A2E to A4F
27 Jan
10:13
05:13
05:13
Equipment Adjustment
Tail Number changed from N17159 to N11150
27 Jan
10:13
05:13
05:13
Gate Adjustment
Departure Gate changed from A4E to A2E
27 Jan
03:13
22:13
22:13
Equipment Adjustment
Tail Number changed from N12136 to N17159
27 Jan
03:13
22:13
22:13
Time Adjustment
Estimated Gate Departure changed to Jan-28-2026 9:00 AM
Estimated Gate Arrival changed to Jan-28-2026 10:57 AM
Tail Number changed to N12136
Actual Equipment changed to E45
27 Jan
03:13
22:13
22:13
Gate Adjustment
Departure Gate changed to A4E
25 Jan
18:44
13:44
13:44
Record Created
25 Jan
18:44
13:44
13:44
Time Adjustment
Scheduled Gate Departure changed to Jan-28-2026 9:00 AM
Scheduled Gate Arrival changed to Jan-28-2026 10:57 AM
Scheduled Equipment changed to ERJ