(UA) United Airlines 4257 Flight Details
On time | Arrived
Departure
IAD
Washington Dulles International Airport, VA, US
Flight Gate Times
10-Mar-2026
Scheduled
09:00
EDT
Actual
08:50
EDT
Total Departure Delay: -
Flight Runway Times
10-Mar-2026
Scheduled
09:21
EDT
Actual
09:17
EDT
Runway Delay: -
Terminal
-
Gate
A5C
Craft Type
Embraer EMB-145XR
E45
Flight Time
Scheduled
1h 49m
Arrival
TYS
Knoxville McGhee Tyson Airport, TN, US
Flight Gate Times
10-Mar-2026
Scheduled
10:49
EDT
Actual
10:23
EDT
Total Arrival Delay: -
Flight Runway Times
10-Mar-2026
Scheduled
10:45
EDT
Actual
10:19
EDT
Runway Delay: -
Terminal
-
Gate
11
Baggage Claim
-
Tail Number
N23139
Flight Time
Actual
1h 33m
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
10 Mar
14:26
10:26
10:26
Time Adjustment
Estimated Gate Arrival changed from Mar-10-2026 10:25 AM to Mar-10-2026 10:23 AM
Actual Gate Arrival changed to Mar-10-2026 10:23 AM
10 Mar
14:20
10:20
10:20
Time Adjustment
Estimated Gate Arrival changed from Mar-10-2026 10:40 AM to Mar-10-2026 10:25 AM
10 Mar
14:20
10:20
10:20
Status Landed
Estimated Runway Arrival changed from Mar-10-2026 10:36 AM to Mar-10-2026 10:19 AM
Actual Runway Arrival changed to Mar-10-2026 10:19 AM
Status changed from Active to Landed
10 Mar
13:20
09:20
09:20
Time Adjustment
Estimated Runway Arrival changed from Mar-10-2026 10:19 AM to Mar-10-2026 10:36 AM
10 Mar
13:18
09:18
09:18
Time Adjustment
Estimated Runway Departure changed from Mar-10-2026 9:21 AM to Mar-10-2026 9:17 AM
Actual Runway Departure changed to Mar-10-2026 9:17 AM
Estimated Runway Arrival changed from Mar-10-2026 10:36 AM to Mar-10-2026 10:19 AM
10 Mar
13:15
09:15
09:15
Time Adjustment
Estimated Runway Arrival changed from Mar-10-2026 10:21 AM to Mar-10-2026 10:36 AM
Estimated Gate Arrival changed from Mar-10-2026 10:49 AM to Mar-10-2026 10:40 AM
10 Mar
12:56
08:56
08:56
Time Adjustment
Estimated Gate Departure changed from Mar-10-2026 8:53 AM to Mar-10-2026 8:50 AM
Actual Gate Departure changed from Mar-10-2026 8:53 AM to Mar-10-2026 8:50 AM
10 Mar
12:55
08:55
08:55
Status Active
Estimated Gate Departure changed from Mar-10-2026 9:00 AM to Mar-10-2026 8:53 AM
Actual Gate Departure changed to Mar-10-2026 8:53 AM
Status changed from Scheduled to Active
10 Mar
12:52
08:52
08:52
Time Adjustment
Estimated Runway Arrival changed from Mar-10-2026 10:45 AM to Mar-10-2026 10:21 AM
10 Mar
12:14
08:14
08:14
Gate Adjustment
Arrival Gate changed to 11
10 Mar
12:10
08:10
08:10
Time Adjustment
Estimated Runway Arrival changed to Mar-10-2026 10:45 AM
10 Mar
11:00
07:00
07:00
Time Adjustment
Estimated Runway Departure changed to Mar-10-2026 9:21 AM
10 Mar
06:26
02:26
02:26
Gate Adjustment
Departure Gate changed from A6C to A5C
10 Mar
06:20
02:20
02:20
Gate Adjustment
Departure Gate changed from A4A to A6C
10 Mar
05:50
01:50
01:50
Equipment Adjustment
Tail Number changed from N16151 to N23139
10 Mar
03:14
23:14
23:14
Gate Adjustment
Departure Gate changed from A4C to A4A
10 Mar
02:39
22:39
22:39
Gate Adjustment
Departure Gate changed from A4A to A4C
9 Mar
22:20
18:20
18:20
Gate Adjustment
Departure Gate changed from A1 to A4A
9 Mar
16:20
12:20
12:20
Gate Adjustment
Departure Gate changed from 1 to A1
Tail Number changed from N33182 to N16151
9 Mar
15:36
11:36
11:36
Gate Adjustment
Departure Gate changed from A1 to 1
9 Mar
15:20
11:20
11:20
Gate Adjustment
Departure Gate changed from A1C to A1
9 Mar
13:07
09:07
09:07
Time Adjustment
Scheduled Runway Departure changed from Mar-10-2026 9:07 AM to Mar-10-2026 9:21 AM
Scheduled Runway Arrival changed from Mar-10-2026 10:09 AM to Mar-10-2026 10:45 AM
9 Mar
13:01
09:01
09:01
Time Adjustment
Scheduled Runway Departure changed to Mar-10-2026 9:07 AM
Scheduled Runway Arrival changed to Mar-10-2026 10:09 AM
9 Mar
11:14
07:14
07:14
Gate Adjustment
Departure Gate changed from C22 to A1C
9 Mar
10:02
06:02
06:02
Equipment Adjustment
Tail Number changed from N12163 to N33182
9 Mar
09:56
05:56
05:56
Equipment Adjustment
Tail Number changed from N12175 to N12163
9 Mar
09:02
05:02
05:02
Gate Adjustment
Departure Gate changed from 22 to C22
Tail Number changed from N12163 to N12175
9 Mar
06:08
02:08
02:08
Gate Adjustment
Departure Gate changed from C22 to 22
9 Mar
05:50
01:50
01:50
Time Adjustment
Estimated Gate Departure changed to Mar-10-2026 9:00 AM
Estimated Gate Arrival changed to Mar-10-2026 10:49 AM
Tail Number changed to N12163
Actual Equipment changed to E45
9 Mar
05:50
01:50
01:50
Gate Adjustment
Departure Gate changed to C22
7 Mar
18:44
13:44
13:44
Record Created
7 Mar
18:44
13:44
13:44
Time Adjustment
Scheduled Gate Departure changed to Mar-10-2026 9:00 AM
Scheduled Gate Arrival changed to Mar-10-2026 10:49 AM
Scheduled Equipment changed to ERJ