(UA) United Airlines 4257 Flight Details
On time | Scheduled
Departure
IAD
Washington Dulles International Airport, VA, US
Flight Gate Times
31-Mar-2026
Scheduled
09:00
EDT
Estimated
09:00
EDT
Total Departure Delay: -
Flight Runway Times
31-Mar-2026
Scheduled
09:21
EDT
Estimated
09:21
EDT
Runway Delay: -
Terminal
-
Gate
A2F
Craft Type
Embraer EMB-145XR
E45
Flight Time
Scheduled
1h 50m
Arrival
TYS
Knoxville McGhee Tyson Airport, TN, US
Flight Gate Times
31-Mar-2026
Scheduled
10:50
EDT
Estimated
10:50
EDT
Total Arrival Delay: -
Flight Runway Times
31-Mar-2026
Scheduled
10:46
EDT
Actual
--
Runway Delay: -
Terminal
-
Gate
-
Baggage Claim
-
Tail Number
N11164
Flight Time
Estimated
1h 50m
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
31 Mar
11:50
07:50
07:50
Time Adjustment
Estimated Runway Departure changed to Mar-31-2026 9:21 AM
31 Mar
05:56
01:56
01:56
Gate Adjustment
Departure Gate changed from A1C to A2F
31 Mar
05:50
01:50
01:50
Equipment Adjustment
Tail Number changed from N12201 to N11164
30 Mar
13:06
09:06
09:06
Time Adjustment
Scheduled Runway Departure changed to Mar-31-2026 9:21 AM
Scheduled Runway Arrival changed to Mar-31-2026 10:46 AM
30 Mar
05:50
01:50
01:50
Equipment Adjustment
Tail Number changed from N14186 to N12201
29 Mar
19:56
15:56
15:56
Time Adjustment
Estimated Gate Departure changed to Mar-31-2026 9:00 AM
Estimated Gate Arrival changed to Mar-31-2026 10:50 AM
Departure Gate changed to A1C
Tail Number changed to N14186
Actual Equipment changed to E45
28 Mar
18:46
14:46
14:46
Record Created
28 Mar
18:46
14:46
14:46
Time Adjustment
Scheduled Gate Departure changed to Mar-31-2026 9:00 AM
Scheduled Gate Arrival changed to Mar-31-2026 10:50 AM
Scheduled Equipment changed to ERJ