(UA) United Airlines 4257 Flight Details
On time | Arrived
Departure
IAD
Washington Dulles International Airport, VA, US
Flight Gate Times
23-Mar-2026
Scheduled
09:00
EDT
Actual
08:49
EDT
Total Departure Delay: -
Flight Runway Times
23-Mar-2026
Scheduled
09:21
EDT
Actual
09:07
EDT
Runway Delay: -
Terminal
-
Gate
A3A
Craft Type
Embraer EMB-145XR
E45
Flight Time
Scheduled
1h 49m
Arrival
TYS
Knoxville McGhee Tyson Airport, TN, US
Flight Gate Times
23-Mar-2026
Scheduled
10:49
EDT
Actual
10:25
EDT
Total Arrival Delay: -
Flight Runway Times
23-Mar-2026
Scheduled
10:45
EDT
Actual
10:21
EDT
Runway Delay: -
Terminal
-
Gate
11
Baggage Claim
-
Tail Number
N14188
Flight Time
Actual
1h 36m
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
23 Mar
14:28
10:28
10:28
Time Adjustment
Estimated Gate Arrival changed from Mar-23-2026 10:24 AM to Mar-23-2026 10:25 AM
Actual Gate Arrival changed to Mar-23-2026 10:25 AM
23 Mar
14:21
10:21
10:21
Status Landed
Estimated Runway Arrival changed from Mar-23-2026 10:20 AM to Mar-23-2026 10:21 AM
Actual Runway Arrival changed to Mar-23-2026 10:21 AM
Status changed from Active to Landed
23 Mar
13:14
09:14
09:14
Time Adjustment
Estimated Runway Arrival changed from Mar-23-2026 10:18 AM to Mar-23-2026 10:20 AM
Estimated Gate Arrival changed from Mar-23-2026 10:49 AM to Mar-23-2026 10:24 AM
23 Mar
13:09
09:09
09:09
Time Adjustment
Estimated Runway Arrival changed from Mar-23-2026 10:12 AM to Mar-23-2026 10:18 AM
23 Mar
13:08
09:08
09:08
Time Adjustment
Estimated Runway Departure changed from Mar-23-2026 9:21 AM to Mar-23-2026 9:07 AM
Actual Runway Departure changed to Mar-23-2026 9:07 AM
Estimated Runway Arrival changed from Mar-23-2026 10:20 AM to Mar-23-2026 10:12 AM
23 Mar
12:51
08:51
08:51
Status Active
Estimated Gate Departure changed from Mar-23-2026 9:00 AM to Mar-23-2026 8:49 AM
Actual Gate Departure changed to Mar-23-2026 8:49 AM
Status changed from Scheduled to Active
23 Mar
12:50
08:50
08:50
Time Adjustment
Estimated Runway Arrival changed from Mar-23-2026 10:45 AM to Mar-23-2026 10:20 AM
23 Mar
12:50
08:50
08:50
Time Adjustment
Estimated Runway Arrival changed to Mar-23-2026 10:45 AM
23 Mar
10:02
06:02
06:02
Gate Adjustment
Arrival Gate changed to 11
23 Mar
10:00
06:00
06:00
Time Adjustment
Estimated Runway Departure changed to Mar-23-2026 9:21 AM
23 Mar
06:15
02:15
02:15
Gate Adjustment
Departure Gate changed from A5B to A3A
23 Mar
06:15
02:15
02:15
Gate Adjustment
Departure Gate changed from A5C to A5B
22 Mar
22:26
18:26
18:26
Gate Adjustment
Departure Gate changed from A3A to A5C
22 Mar
22:26
18:26
18:26
Gate Adjustment
Departure Gate changed from A1C to A3A
22 Mar
22:26
18:26
18:26
Gate Adjustment
Departure Gate changed from A2F to A1C
22 Mar
21:51
17:51
17:51
Gate Adjustment
Departure Gate changed from A4B to A2F
22 Mar
16:56
12:56
12:56
Gate Adjustment
Departure Gate changed from A6A to A4B
22 Mar
13:51
09:51
09:51
Gate Adjustment
Departure Gate changed from A5A to A6A
22 Mar
13:44
09:44
09:44
Equipment Adjustment
Tail Number changed from N11164 to N14188
22 Mar
13:44
09:44
09:44
Equipment Adjustment
Tail Number changed from N14186 to N11164
22 Mar
13:06
09:06
09:06
Time Adjustment
Scheduled Runway Departure changed from Mar-23-2026 9:05 AM to Mar-23-2026 9:21 AM
Scheduled Runway Arrival changed from Mar-23-2026 10:07 AM to Mar-23-2026 10:45 AM
22 Mar
13:01
09:01
09:01
Time Adjustment
Scheduled Runway Departure changed to Mar-23-2026 9:05 AM
Scheduled Runway Arrival changed to Mar-23-2026 10:07 AM
22 Mar
11:38
07:38
07:38
Gate Adjustment
Departure Gate changed from A5C to A5A
22 Mar
02:14
22:14
22:14
Equipment Adjustment
Tail Number changed from N12135 to N14186
22 Mar
02:14
22:14
22:14
Equipment Adjustment
Tail Number changed from N27200 to N12135
22 Mar
02:14
22:14
22:14
Gate Adjustment
Departure Gate changed to A5C
21 Mar
05:50
01:50
01:50
Time Adjustment
Estimated Gate Departure changed to Mar-23-2026 9:00 AM
Estimated Gate Arrival changed to Mar-23-2026 10:49 AM
Tail Number changed to N27200
Actual Equipment changed to E45
20 Mar
18:47
14:47
14:47
Record Created
20 Mar
18:47
14:47
14:47
Time Adjustment
Scheduled Gate Departure changed to Mar-23-2026 9:00 AM
Scheduled Gate Arrival changed to Mar-23-2026 10:49 AM
Scheduled Equipment changed to ERJ