(UA) United Airlines 4257 Flight Details
On time | Scheduled
Departure
IAD
Washington Dulles International Airport, VA, US
Flight Gate Times
05-Jan-2026
Scheduled
09:00
EST
Estimated
09:00
EST
Total Departure Delay: -
Flight Runway Times
05-Jan-2026
Scheduled
09:21
EST
Actual
--
Runway Delay: -
Terminal
-
Gate
A1C
Craft Type
Embraer EMB-145XR
E45
Flight Time
Scheduled
1h 56m
Arrival
TYS
Knoxville McGhee Tyson Airport, TN, US
Flight Gate Times
05-Jan-2026
Scheduled
10:56
EST
Estimated
10:56
EST
Total Arrival Delay: -
Flight Runway Times
05-Jan-2026
Scheduled
10:52
EST
Actual
--
Runway Delay: -
Terminal
-
Gate
-
Baggage Claim
-
Tail Number
N12167
Flight Time
Estimated
1h 56m
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
5 Jan
03:37
22:37
22:37
Gate Adjustment
Departure Gate changed from A3A to A1C
4 Jan
17:13
12:13
12:13
Gate Adjustment
Departure Gate changed from A5B to A3A
4 Jan
17:07
12:07
12:07
Gate Adjustment
Departure Gate changed from A1C to A5B
4 Jan
14:07
09:07
09:07
Time Adjustment
Scheduled Runway Departure changed from Jan-05-2026 9:13 AM to Jan-05-2026 9:21 AM
Scheduled Runway Arrival changed from Jan-05-2026 10:15 AM to Jan-05-2026 10:52 AM
4 Jan
14:01
09:01
09:01
Time Adjustment
Scheduled Runway Departure changed to Jan-05-2026 9:13 AM
Scheduled Runway Arrival changed to Jan-05-2026 10:15 AM
4 Jan
12:37
07:37
07:37
Gate Adjustment
Departure Gate changed from 1 to A1C
4 Jan
03:26
22:26
22:26
Gate Adjustment
Departure Gate changed from A1 to 1
4 Jan
03:19
22:19
22:19
Equipment Adjustment
Tail Number changed from N14203 to N12167
4 Jan
03:13
22:13
22:13
Gate Adjustment
Departure Gate changed from A4A to A1
4 Jan
03:13
22:13
22:13
Equipment Adjustment
Tail Number changed from N14148 to N14203
4 Jan
02:55
21:55
21:55
Gate Adjustment
Departure Gate changed to A4A
3 Jan
06:49
01:49
01:49
Time Adjustment
Estimated Gate Departure changed to Jan-05-2026 9:00 AM
Estimated Gate Arrival changed to Jan-05-2026 10:56 AM
Tail Number changed to N14148
Actual Equipment changed to E45
2 Jan
18:48
13:48
13:48
Record Created
2 Jan
18:48
13:48
13:48
Time Adjustment
Scheduled Gate Departure changed to Jan-05-2026 9:00 AM
Scheduled Gate Arrival changed to Jan-05-2026 10:56 AM
Scheduled Equipment changed to ERJ