(UA) United Airlines 4257 Flight Details
On time | Scheduled
Departure
IAD
Washington Dulles International Airport, VA, US
Flight Gate Times
06-Dec-2025
Scheduled
09:00
EST
Estimated
09:00
EST
Total Departure Delay: -
Flight Runway Times
06-Dec-2025
Scheduled
09:21
EST
Actual
--
Runway Delay: -
Terminal
-
Gate
A4F
Craft Type
Embraer EMB-145XR
E45
Flight Time
Scheduled
1h 48m
Arrival
TYS
Knoxville McGhee Tyson Airport, TN, US
Flight Gate Times
06-Dec-2025
Scheduled
10:48
EST
Estimated
10:48
EST
Total Arrival Delay: -
Flight Runway Times
06-Dec-2025
Scheduled
10:44
EST
Actual
--
Runway Delay: -
Terminal
-
Gate
-
Baggage Claim
-
Tail Number
N16147
Flight Time
Estimated
1h 48m
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
6 Dec
01:43
20:43
20:43
Gate Adjustment
Departure Gate changed from A2E to A4F
5 Dec
19:49
14:49
14:49
Equipment Adjustment
Tail Number changed from N17138 to N16147
5 Dec
18:55
13:55
13:55
Equipment Adjustment
Tail Number changed from N14179 to N17138
5 Dec
17:25
12:25
12:25
Gate Adjustment
Departure Gate changed from A5B to A2E
5 Dec
15:13
10:13
10:13
Gate Adjustment
Departure Gate changed from A6A to A5B
5 Dec
15:01
10:01
10:01
Gate Adjustment
Departure Gate changed from A5A to A6A
5 Dec
14:07
09:07
09:07
Time Adjustment
Scheduled Runway Departure changed from Dec-06-2025 9:07 AM to Dec-06-2025 9:21 AM
Scheduled Runway Arrival changed from Dec-06-2025 10:17 AM to Dec-06-2025 10:44 AM
5 Dec
14:01
09:01
09:01
Time Adjustment
Scheduled Runway Departure changed to Dec-06-2025 9:07 AM
Scheduled Runway Arrival changed to Dec-06-2025 10:17 AM
5 Dec
02:17
21:17
21:17
Gate Adjustment
Departure Gate changed to A5A
4 Dec
18:31
13:31
13:31
Equipment Adjustment
Tail Number changed to N14179
Actual Equipment changed to E45
4 Dec
15:49
10:49
10:49
Time Adjustment
Estimated Gate Departure changed to Dec-06-2025 9:00 AM
Estimated Gate Arrival changed to Dec-06-2025 10:48 AM
3 Dec
18:44
13:44
13:44
Record Created
3 Dec
18:44
13:44
13:44
Time Adjustment
Scheduled Gate Departure changed to Dec-06-2025 9:00 AM
Scheduled Gate Arrival changed to Dec-06-2025 10:48 AM
Scheduled Equipment changed to ERJ