(UA) United Airlines 4257 Flight Details
On time | Scheduled
Departure
IAD
Washington Dulles International Airport, VA, US
Flight Gate Times
09-Dec-2025
Scheduled
09:00
EST
Estimated
09:00
EST
Total Departure Delay: -
Flight Runway Times
09-Dec-2025
Scheduled
09:21
EST
Actual
--
Runway Delay: -
Terminal
-
Gate
A4A
Craft Type
Embraer EMB-145XR
E45
Flight Time
Scheduled
1h 48m
Arrival
TYS
Knoxville McGhee Tyson Airport, TN, US
Flight Gate Times
09-Dec-2025
Scheduled
10:48
EST
Estimated
10:48
EST
Total Arrival Delay: -
Flight Runway Times
09-Dec-2025
Scheduled
10:44
EST
Actual
--
Runway Delay: -
Terminal
-
Gate
-
Baggage Claim
-
Tail Number
N10156
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
8 Dec
18:43
13:43
13:43
Gate Adjustment
Departure Gate changed from A1C to A4A
8 Dec
14:06
09:06
09:06
Time Adjustment
Scheduled Runway Departure changed from Dec-09-2025 9:06 AM to Dec-09-2025 9:21 AM
Scheduled Runway Arrival changed from Dec-09-2025 10:11 AM to Dec-09-2025 10:44 AM
8 Dec
14:01
09:01
09:01
Time Adjustment
Scheduled Runway Departure changed to Dec-09-2025 9:06 AM
Scheduled Runway Arrival changed to Dec-09-2025 10:11 AM
8 Dec
13:19
08:19
08:19
Gate Adjustment
Departure Gate changed from A5B to A1C
8 Dec
13:19
08:19
08:19
Gate Adjustment
Departure Gate changed from A4A to A5B
8 Dec
12:07
07:07
07:07
Gate Adjustment
Departure Gate changed to A4A
8 Dec
11:37
06:37
06:37
Equipment Adjustment
Tail Number changed from N12195 to N10156
8 Dec
06:49
01:49
01:49
Time Adjustment
Estimated Gate Departure changed to Dec-09-2025 9:00 AM
Estimated Gate Arrival changed to Dec-09-2025 10:48 AM
Tail Number changed to N12195
Actual Equipment changed to E45
6 Dec
18:44
13:44
13:44
Record Created
6 Dec
18:44
13:44
13:44
Time Adjustment
Scheduled Gate Departure changed to Dec-09-2025 9:00 AM
Scheduled Gate Arrival changed to Dec-09-2025 10:48 AM
Scheduled Equipment changed to ERJ