(UA) United Airlines 4257 Flight Details
On time | Scheduled
Departure
IAD
Washington Dulles International Airport, VA, US
Flight Gate Times
05-Dec-2025
Scheduled
09:00
EST
Estimated
09:00
EST
Total Departure Delay: -
Flight Runway Times
05-Dec-2025
Scheduled
09:21
EST
Actual
--
Runway Delay: -
Terminal
-
Gate
A1C
Craft Type
Embraer EMB-145XR
E45
Flight Time
Scheduled
1h 48m
Arrival
TYS
Knoxville McGhee Tyson Airport, TN, US
Flight Gate Times
05-Dec-2025
Scheduled
10:48
EST
Estimated
10:48
EST
Total Arrival Delay: -
Flight Runway Times
05-Dec-2025
Scheduled
10:44
EST
Actual
--
Runway Delay: -
Terminal
-
Gate
-
Baggage Claim
-
Tail Number
N21144
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
4 Dec
21:49
16:49
16:49
Equipment Adjustment
Tail Number changed from N11191 to N21144
4 Dec
14:07
09:07
09:07
Time Adjustment
Scheduled Runway Departure changed from Dec-05-2025 9:06 AM to Dec-05-2025 9:21 AM
Scheduled Runway Arrival changed from Dec-05-2025 10:16 AM to Dec-05-2025 10:44 AM
4 Dec
14:01
09:01
09:01
Time Adjustment
Scheduled Runway Departure changed to Dec-05-2025 9:06 AM
Scheduled Runway Arrival changed to Dec-05-2025 10:16 AM
4 Dec
06:49
01:49
01:49
Time Adjustment
Estimated Gate Departure changed to Dec-05-2025 9:00 AM
Estimated Gate Arrival changed to Dec-05-2025 10:48 AM
Tail Number changed to N11191
Actual Equipment changed to E45
4 Dec
06:49
01:49
01:49
Gate Adjustment
Departure Gate changed to A1C
2 Dec
18:48
13:48
13:48
Record Created
2 Dec
18:48
13:48
13:48
Time Adjustment
Scheduled Gate Departure changed to Dec-05-2025 9:00 AM
Scheduled Gate Arrival changed to Dec-05-2025 10:48 AM
Scheduled Equipment changed to ERJ