(UA) United Airlines 4257 Flight Details
On time | Departed
Departure
IAD
Washington Dulles International Airport, VA, US
Flight Gate Times
04-Mar-2026
Scheduled
09:00
EST
Actual
08:48
EST
Total Departure Delay: -
Flight Runway Times
04-Mar-2026
Scheduled
09:21
EST
Actual
09:05
EST
Runway Delay: -
Terminal
-
Gate
A4A
Craft Type
Embraer EMB-145XR
E45
Flight Time
Scheduled
1h 49m
Arrival
TYS
Knoxville McGhee Tyson Airport, TN, US
Flight Gate Times
04-Mar-2026
Scheduled
10:49
EST
Estimated
10:22
EST
Total Arrival Delay: -
Flight Runway Times
04-Mar-2026
Scheduled
10:45
EST
Estimated
10:18
EST
Runway Delay: -
Terminal
-
Gate
11
Baggage Claim
3
Tail Number
N31131
Flight Time
Estimated
1h 34m
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
4 Mar
14:09
09:09
09:09
Time Adjustment
Estimated Runway Arrival changed from Mar-04-2026 10:14 AM to Mar-04-2026 10:18 AM
Estimated Gate Arrival changed from Mar-04-2026 10:49 AM to Mar-04-2026 10:22 AM
4 Mar
14:08
09:08
09:08
Time Adjustment
Estimated Runway Arrival changed from Mar-04-2026 10:08 AM to Mar-04-2026 10:14 AM
4 Mar
14:07
09:07
09:07
Time Adjustment
Estimated Runway Arrival changed from Mar-04-2026 10:09 AM to Mar-04-2026 10:08 AM
4 Mar
14:06
09:06
09:06
Time Adjustment
Estimated Runway Departure changed from Mar-04-2026 9:21 AM to Mar-04-2026 9:05 AM
Actual Runway Departure changed to Mar-04-2026 9:05 AM
4 Mar
14:06
09:06
09:06
Time Adjustment
Estimated Runway Arrival changed from Mar-04-2026 10:18 AM to Mar-04-2026 10:09 AM
4 Mar
13:51
08:51
08:51
Status Active
Estimated Gate Departure changed from Mar-04-2026 9:00 AM to Mar-04-2026 8:48 AM
Actual Gate Departure changed to Mar-04-2026 8:48 AM
Status changed from Scheduled to Active
4 Mar
13:50
08:50
08:50
Time Adjustment
Estimated Runway Arrival changed from Mar-04-2026 10:45 AM to Mar-04-2026 10:18 AM
4 Mar
13:27
08:27
08:27
Gate Adjustment
Baggage changed to 3
4 Mar
13:20
08:20
08:20
Gate Adjustment
Arrival Gate changed to 11
4 Mar
13:20
08:20
08:20
Time Adjustment
Estimated Runway Arrival changed to Mar-04-2026 10:45 AM
4 Mar
13:16
08:16
08:16
Time Adjustment
Estimated Runway Departure changed to Mar-04-2026 9:21 AM
3 Mar
23:26
18:26
18:26
Gate Adjustment
Departure Gate changed from A4C to A4A
3 Mar
21:56
16:56
16:56
Equipment Adjustment
Tail Number changed from N11192 to N31131
3 Mar
18:08
13:08
13:08
Equipment Adjustment
Tail Number changed from N14174 to N11192
3 Mar
18:02
13:02
13:02
Equipment Adjustment
Tail Number changed from N12160 to N14174
3 Mar
14:06
09:06
09:06
Time Adjustment
Scheduled Runway Departure changed from Mar-04-2026 9:09 AM to Mar-04-2026 9:21 AM
Scheduled Runway Arrival changed from Mar-04-2026 10:13 AM to Mar-04-2026 10:45 AM
3 Mar
14:01
09:01
09:01
Time Adjustment
Scheduled Runway Departure changed to Mar-04-2026 9:09 AM
Scheduled Runway Arrival changed to Mar-04-2026 10:13 AM
3 Mar
06:50
01:50
01:50
Time Adjustment
Estimated Gate Departure changed to Mar-04-2026 9:00 AM
Estimated Gate Arrival changed to Mar-04-2026 10:49 AM
Tail Number changed to N12160
Actual Equipment changed to E45
3 Mar
06:50
01:50
01:50
Gate Adjustment
Departure Gate changed to A4C
1 Mar
18:46
13:46
13:46
Record Created
1 Mar
18:46
13:46
13:46
Time Adjustment
Scheduled Gate Departure changed to Mar-04-2026 9:00 AM
Scheduled Gate Arrival changed to Mar-04-2026 10:49 AM
Scheduled Equipment changed to ERJ