(UA) United Airlines 4257 Flight Details
On time | Departed
Departure
IAD
Washington Dulles International Airport, VA, US
Flight Gate Times
23-Jan-2026
Scheduled
09:00
EST
Actual
08:50
EST
Total Departure Delay: -
Flight Runway Times
23-Jan-2026
Scheduled
09:21
EST
Actual
08:57
EST
Runway Delay: -
Terminal
-
Gate
A4C
Craft Type
Embraer EMB-145XR
E45
Flight Time
Scheduled
1h 57m
Arrival
TYS
Knoxville McGhee Tyson Airport, TN, US
Flight Gate Times
23-Jan-2026
Scheduled
10:57
EST
Estimated
10:22
EST
Total Arrival Delay: -
Flight Runway Times
23-Jan-2026
Scheduled
10:53
EST
Estimated
10:18
EST
Runway Delay: -
Terminal
-
Gate
11
Baggage Claim
3
Tail Number
N14125
Flight Time
Estimated
1h 32m
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
23 Jan
14:01
09:01
09:01
Time Adjustment
Estimated Runway Arrival changed from Jan-23-2026 10:04 AM to Jan-23-2026 10:18 AM
Estimated Gate Arrival changed from Jan-23-2026 10:57 AM to Jan-23-2026 10:22 AM
23 Jan
13:58
08:58
08:58
Time Adjustment
Estimated Runway Departure changed from Jan-23-2026 9:21 AM to Jan-23-2026 8:57 AM
Actual Runway Departure changed to Jan-23-2026 8:57 AM
Estimated Runway Arrival changed from Jan-23-2026 10:18 AM to Jan-23-2026 10:04 AM
23 Jan
13:55
08:55
08:55
Time Adjustment
Estimated Gate Departure changed from Jan-23-2026 8:42 AM to Jan-23-2026 8:50 AM
Actual Gate Departure changed from Jan-23-2026 8:42 AM to Jan-23-2026 8:50 AM
Estimated Gate Arrival changed from Jan-23-2026 10:22 AM to Jan-23-2026 10:57 AM
23 Jan
13:53
08:53
08:53
Time Adjustment
Estimated Gate Departure changed from Jan-23-2026 8:48 AM to Jan-23-2026 8:42 AM
Actual Gate Departure changed from Jan-23-2026 8:48 AM to Jan-23-2026 8:42 AM
23 Jan
13:51
08:51
08:51
Status Active
Estimated Gate Departure changed from Jan-23-2026 9:00 AM to Jan-23-2026 8:48 AM
Actual Gate Departure changed to Jan-23-2026 8:48 AM
Status changed from Scheduled to Active
23 Jan
13:51
08:51
08:51
Time Adjustment
Estimated Runway Arrival changed from Jan-23-2026 10:53 AM to Jan-23-2026 10:18 AM
Estimated Gate Arrival changed from Jan-23-2026 10:57 AM to Jan-23-2026 10:22 AM
23 Jan
13:51
08:51
08:51
Time Adjustment
Estimated Runway Arrival changed to Jan-23-2026 10:53 AM
23 Jan
12:52
07:52
07:52
Time Adjustment
Estimated Runway Departure changed to Jan-23-2026 9:21 AM
23 Jan
09:43
04:43
04:43
Gate Adjustment
Arrival Gate changed to 11
Baggage changed to 3
22 Jan
20:55
15:55
15:55
Gate Adjustment
Departure Gate changed from A4A to A4C
22 Jan
18:43
13:43
13:43
Equipment Adjustment
Tail Number changed from N21144 to N14125
22 Jan
14:07
09:07
09:07
Time Adjustment
Scheduled Runway Departure changed from Jan-23-2026 9:07 AM to Jan-23-2026 9:21 AM
Scheduled Runway Arrival changed from Jan-23-2026 10:15 AM to Jan-23-2026 10:53 AM
22 Jan
14:01
09:01
09:01
Time Adjustment
Scheduled Runway Departure changed to Jan-23-2026 9:07 AM
Scheduled Runway Arrival changed to Jan-23-2026 10:15 AM
22 Jan
12:25
07:25
07:25
Gate Adjustment
Departure Gate changed from A1C to A4A
22 Jan
02:25
21:25
21:25
Gate Adjustment
Departure Gate changed to A1C
21 Jan
13:07
08:07
08:07
Equipment Adjustment
Tail Number changed from N23139 to N21144
21 Jan
12:49
07:49
07:49
Time Adjustment
Estimated Gate Departure changed to Jan-23-2026 9:00 AM
Estimated Gate Arrival changed to Jan-23-2026 10:57 AM
Tail Number changed to N23139
Actual Equipment changed to E45
20 Jan
18:47
13:47
13:47
Record Created
20 Jan
18:47
13:47
13:47
Time Adjustment
Scheduled Gate Departure changed to Jan-23-2026 9:00 AM
Scheduled Gate Arrival changed to Jan-23-2026 10:57 AM
Scheduled Equipment changed to ERJ