(UA) United Airlines 4257 Flight Details
On time | Scheduled
Departure
IAD
Washington Dulles International Airport, VA, US
Flight Gate Times
24-Aug-2026
Scheduled
09:00
EDT
Estimated
09:00
EDT
Total Departure Delay: -
Flight Runway Times
24-Aug-2026
Scheduled
09:17
EDT
Actual
--
Runway Delay: -
Terminal
-
Gate
A4F
Craft Type
Embraer EMB-145XR
E45
Flight Time
Scheduled
1h 37m
Arrival
TYS
Knoxville McGhee Tyson Airport, TN, US
Flight Gate Times
24-Aug-2026
Scheduled
10:37
EDT
Estimated
10:37
EDT
Total Arrival Delay: -
Flight Runway Times
24-Aug-2026
Scheduled
10:33
EDT
Actual
--
Runway Delay: -
Terminal
-
Gate
-
Baggage Claim
-
Tail Number
N12136
Flight Time
Estimated
1h 37m
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
24 Aug
01:56
21:56
21:56
Gate Adjustment
Departure Gate changed from A3C to A4F
24 Aug
01:44
21:44
21:44
Equipment Adjustment
Tail Number changed from N11165 to N12136
23 Aug
22:56
18:56
18:56
Gate Adjustment
Departure Gate changed from A6A to A3C
23 Aug
18:51
14:51
14:51
Gate Adjustment
Departure Gate changed from A6C to A6A
23 Aug
13:06
09:06
09:06
Time Adjustment
Scheduled Runway Departure changed from Aug-24-2026 9:08 AM to Aug-24-2026 9:17 AM
Scheduled Runway Arrival changed from Aug-24-2026 10:12 AM to Aug-24-2026 10:33 AM
23 Aug
13:01
09:01
09:01
Time Adjustment
Scheduled Runway Departure changed to Aug-24-2026 9:08 AM
Scheduled Runway Arrival changed to Aug-24-2026 10:12 AM
23 Aug
01:26
21:26
21:26
Gate Adjustment
Departure Gate changed to A6C
22 Aug
15:50
11:50
11:50
Time Adjustment
Estimated Gate Departure changed to Aug-24-2026 9:00 AM
Estimated Gate Arrival changed to Aug-24-2026 10:37 AM
Tail Number changed to N11165
Actual Equipment changed to E45
21 Aug
18:52
14:52
14:52
Record Created
21 Aug
18:52
14:52
14:52
Time Adjustment
Scheduled Gate Departure changed to Aug-24-2026 9:00 AM
Scheduled Gate Arrival changed to Aug-24-2026 10:37 AM
Scheduled Equipment changed to ERJ