(UA) United Airlines 4257 Flight Details
On time | Arrived
Departure
IAD
Washington Dulles International Airport, VA, US
Flight Gate Times
21-Feb-2026
Scheduled
09:00
EST
Actual
09:00
EST
Total Departure Delay: -
Flight Runway Times
21-Feb-2026
Scheduled
09:21
EST
Actual
09:21
EST
Runway Delay: -
Terminal
-
Gate
A6B
Craft Type
Embraer EMB-145XR
E45
Flight Time
Scheduled
1h 49m
Arrival
TYS
Knoxville McGhee Tyson Airport, TN, US
Flight Gate Times
21-Feb-2026
Scheduled
10:49
EST
Actual
10:44
EST
Total Arrival Delay: -
Flight Runway Times
21-Feb-2026
Scheduled
10:45
EST
Actual
10:40
EST
Runway Delay: -
Terminal
-
Gate
11
Baggage Claim
3
Tail Number
N16147
Flight Time
Actual
1h 44m
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
21 Feb
15:47
10:47
10:47
Time Adjustment
Estimated Gate Arrival changed from Feb-21-2026 10:45 AM to Feb-21-2026 10:44 AM
Actual Gate Arrival changed to Feb-21-2026 10:44 AM
21 Feb
15:46
10:46
10:46
Time Adjustment
Estimated Gate Arrival changed to Feb-21-2026 10:45 AM
21 Feb
15:41
10:41
10:41
Status Landed
Estimated Runway Arrival changed from Feb-21-2026 10:33 AM to Feb-21-2026 10:40 AM
Actual Runway Arrival changed to Feb-21-2026 10:40 AM
Estimated Gate Arrival changed from Feb-21-2026 10:37 AM
Status changed from Active to Landed
21 Feb
14:23
09:23
09:23
Time Adjustment
Estimated Runway Arrival changed from Feb-21-2026 10:29 AM to Feb-21-2026 10:33 AM
Estimated Gate Arrival changed from Feb-21-2026 10:49 AM to Feb-21-2026 10:37 AM
21 Feb
14:22
09:22
09:22
Time Adjustment
Estimated Runway Arrival changed from Feb-21-2026 10:29 AM to Feb-21-2026 10:33 AM
21 Feb
14:22
09:22
09:22
Time Adjustment
Estimated Runway Arrival changed from Feb-21-2026 10:33 AM to Feb-21-2026 10:29 AM
21 Feb
14:22
09:22
09:22
Time Adjustment
Actual Runway Departure changed to Feb-21-2026 9:21 AM
Estimated Runway Arrival changed from Feb-21-2026 10:45 AM to Feb-21-2026 10:29 AM
21 Feb
14:02
09:02
09:02
Status Active
Actual Gate Departure changed to Feb-21-2026 9:00 AM
Status changed from Scheduled to Active
21 Feb
14:02
09:02
09:02
Time Adjustment
Estimated Runway Arrival changed to Feb-21-2026 10:45 AM
21 Feb
10:46
05:46
05:46
Gate Adjustment
Departure Gate changed from A4F to A6B
21 Feb
10:44
05:44
05:44
Time Adjustment
Estimated Runway Departure changed to Feb-21-2026 9:21 AM
21 Feb
09:40
04:40
04:40
Gate Adjustment
Arrival Gate changed to 11
Baggage changed to 3
21 Feb
06:52
01:52
01:52
Gate Adjustment
Departure Gate changed from A6A to A4F
21 Feb
06:46
01:46
01:46
Equipment Adjustment
Tail Number changed from N11191 to N16147
20 Feb
22:51
17:51
17:51
Gate Adjustment
Departure Gate changed from A4F to A6A
20 Feb
14:07
09:07
09:07
Time Adjustment
Scheduled Runway Departure changed from Feb-21-2026 9:09 AM to Feb-21-2026 9:21 AM
Scheduled Runway Arrival changed from Feb-21-2026 10:17 AM to Feb-21-2026 10:45 AM
20 Feb
14:01
09:01
09:01
Time Adjustment
Scheduled Runway Departure changed to Feb-21-2026 9:09 AM
Scheduled Runway Arrival changed to Feb-21-2026 10:17 AM
20 Feb
12:57
07:57
07:57
Gate Adjustment
Departure Gate changed from A4C to A4F
20 Feb
06:52
01:52
01:52
Time Adjustment
Estimated Gate Departure changed to Feb-21-2026 9:00 AM
Estimated Gate Arrival changed to Feb-21-2026 10:49 AM
Tail Number changed to N11191
Actual Equipment changed to E45
20 Feb
06:52
01:52
01:52
Gate Adjustment
Departure Gate changed to A4C
18 Feb
18:46
13:46
13:46
Record Created
18 Feb
18:46
13:46
13:46
Time Adjustment
Scheduled Gate Departure changed to Feb-21-2026 9:00 AM
Scheduled Gate Arrival changed to Feb-21-2026 10:49 AM
Scheduled Equipment changed to ERJ