(UA) United Airlines 4257 Flight Details
On time | Arrived
Departure
IAD
Washington Dulles International Airport, VA, US
Flight Gate Times
17-Mar-2026
Scheduled
09:00
EDT
Actual
08:50
EDT
Total Departure Delay: -
Flight Runway Times
17-Mar-2026
Scheduled
09:21
EDT
Actual
09:09
EDT
Runway Delay: -
Terminal
-
Gate
A4F
Craft Type
Embraer EMB-145XR
E45
Flight Time
Scheduled
1h 49m
Arrival
TYS
Knoxville McGhee Tyson Airport, TN, US
Flight Gate Times
17-Mar-2026
Scheduled
10:49
EDT
Actual
10:33
EDT
Total Arrival Delay: -
Flight Runway Times
17-Mar-2026
Scheduled
10:45
EDT
Actual
10:29
EDT
Runway Delay: -
Terminal
-
Gate
11
Baggage Claim
3
Tail Number
N16151
Flight Time
Actual
1h 43m
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
17 Mar
14:36
10:36
10:36
Time Adjustment
Estimated Gate Arrival changed from Mar-17-2026 10:35 AM to Mar-17-2026 10:33 AM
Actual Gate Arrival changed to Mar-17-2026 10:33 AM
17 Mar
14:31
10:31
10:31
Status Landed
Estimated Runway Arrival changed from Mar-17-2026 10:21 AM to Mar-17-2026 10:29 AM
Actual Runway Arrival changed to Mar-17-2026 10:29 AM
Estimated Gate Arrival changed from Mar-17-2026 10:25 AM
Status changed from Active to Landed
17 Mar
14:31
10:31
10:31
Time Adjustment
Estimated Gate Arrival changed to Mar-17-2026 10:35 AM
17 Mar
13:14
09:14
09:14
Time Adjustment
Estimated Runway Departure changed from Mar-17-2026 9:10 AM to Mar-17-2026 9:09 AM
Actual Runway Departure changed from Mar-17-2026 9:10 AM to Mar-17-2026 9:09 AM
Estimated Gate Arrival changed from Mar-17-2026 10:49 AM to Mar-17-2026 10:25 AM
17 Mar
13:12
09:12
09:12
Time Adjustment
Estimated Runway Arrival changed from Mar-17-2026 10:20 AM to Mar-17-2026 10:21 AM
17 Mar
13:10
09:10
09:10
Time Adjustment
Estimated Runway Departure changed from Mar-17-2026 9:21 AM to Mar-17-2026 9:10 AM
Actual Runway Departure changed to Mar-17-2026 9:10 AM
Estimated Runway Arrival changed from Mar-17-2026 10:21 AM to Mar-17-2026 10:20 AM
17 Mar
12:56
08:56
08:56
Status Active
Estimated Gate Departure changed from Mar-17-2026 9:00 AM to Mar-17-2026 8:50 AM
Actual Gate Departure changed to Mar-17-2026 8:50 AM
Estimated Gate Arrival changed from Mar-17-2026 10:25 AM to Mar-17-2026 10:49 AM
Status changed from Scheduled to Active
17 Mar
12:52
08:52
08:52
Time Adjustment
Estimated Runway Arrival changed from Mar-17-2026 10:45 AM to Mar-17-2026 10:21 AM
Estimated Gate Arrival changed from Mar-17-2026 10:49 AM to Mar-17-2026 10:25 AM
17 Mar
12:52
08:52
08:52
Time Adjustment
Estimated Runway Arrival changed to Mar-17-2026 10:45 AM
17 Mar
11:44
07:44
07:44
Time Adjustment
Estimated Runway Departure changed to Mar-17-2026 9:21 AM
17 Mar
08:32
04:32
04:32
Gate Adjustment
Arrival Gate changed to 11
Baggage changed to 3
17 Mar
05:02
01:02
01:02
Gate Adjustment
Departure Gate changed from A6C to A4F
17 Mar
04:44
00:44
00:44
Equipment Adjustment
Tail Number changed from N16147 to N16151
17 Mar
03:14
23:14
23:14
Gate Adjustment
Departure Gate changed from A6A to A6C
17 Mar
02:02
22:02
22:02
Gate Adjustment
Departure Gate changed from A6C to A6A
16 Mar
18:09
14:09
14:09
Equipment Adjustment
Tail Number changed from N12201 to N16147
16 Mar
14:34
10:34
10:34
Equipment Adjustment
Tail Number changed from N11193 to N12201
16 Mar
13:06
09:06
09:06
Time Adjustment
Scheduled Runway Departure changed from Mar-17-2026 9:05 AM to Mar-17-2026 9:21 AM
Scheduled Runway Arrival changed from Mar-17-2026 10:10 AM to Mar-17-2026 10:45 AM
16 Mar
13:01
09:01
09:01
Time Adjustment
Scheduled Runway Departure changed to Mar-17-2026 9:05 AM
Scheduled Runway Arrival changed to Mar-17-2026 10:10 AM
16 Mar
11:27
07:27
07:27
Gate Adjustment
Departure Gate changed from A6B to A6C
16 Mar
01:15
21:15
21:15
Gate Adjustment
Departure Gate changed to A6B
15 Mar
05:50
01:50
01:50
Time Adjustment
Estimated Gate Departure changed to Mar-17-2026 9:00 AM
Estimated Gate Arrival changed to Mar-17-2026 10:49 AM
Tail Number changed to N11193
Actual Equipment changed to E45
14 Mar
18:44
14:44
14:44
Record Created
14 Mar
18:44
14:44
14:44
Time Adjustment
Scheduled Gate Departure changed to Mar-17-2026 9:00 AM
Scheduled Gate Arrival changed to Mar-17-2026 10:49 AM
Scheduled Equipment changed to ERJ