(UA) United Airlines 4257 Flight Details
On time | Arrived
Departure
IAD
Washington Dulles International Airport, VA, US
Flight Gate Times
18-Sep-2025
Scheduled
08:45
EDT
Actual
08:38
EDT
Total Departure Delay: -
Flight Runway Times
18-Sep-2025
Scheduled
09:06
EDT
Actual
08:58
EDT
Runway Delay: -
Terminal
-
Gate
A4A
Craft Type
Embraer EMB-145XR
E45
Flight Time
Scheduled
1h 43m
Arrival
TYS
Knoxville McGhee Tyson Airport, TN, US
Flight Gate Times
18-Sep-2025
Scheduled
10:28
EDT
Actual
10:06
EDT
Total Arrival Delay: -
Flight Runway Times
18-Sep-2025
Scheduled
10:24
EDT
Actual
10:00
EDT
Runway Delay: -
Terminal
-
Gate
11
Baggage Claim
3
Tail Number
N21144
Flight Time
Actual
1h 28m
Flight Notes
Operated by CommuteAir on behalf of United Airlines
Also marketed as (AC) Air Canada 4741, (CM) Copa Airlines 2237
Event Timeline
Date
Event
Data Updated
18 Sep
14:09
10:09
10:09
Time Adjustment
Estimated Gate Arrival changed from Sep-18-2025 10:03 AM to Sep-18-2025 10:06 AM
Actual Gate Arrival changed to Sep-18-2025 10:06 AM
18 Sep
14:04
10:04
10:04
Time Adjustment
Estimated Runway Arrival changed from Sep-18-2025 10:01 AM to Sep-18-2025 10:00 AM
Actual Runway Arrival changed from Sep-18-2025 10:01 AM to Sep-18-2025 10:00 AM
Estimated Gate Arrival changed from Sep-18-2025 10:24 AM to Sep-18-2025 10:03 AM
18 Sep
14:02
10:02
10:02
Status Landed
Estimated Runway Arrival changed from Sep-18-2025 10:20 AM to Sep-18-2025 10:01 AM
Actual Runway Arrival changed to Sep-18-2025 10:01 AM
Status changed from Active to Landed
18 Sep
13:04
09:04
09:04
Time Adjustment
Estimated Runway Departure changed from Sep-18-2025 8:59 AM to Sep-18-2025 8:58 AM
Actual Runway Departure changed from Sep-18-2025 8:59 AM to Sep-18-2025 8:58 AM
Estimated Runway Arrival changed from Sep-18-2025 10:08 AM to Sep-18-2025 10:20 AM
Estimated Gate Arrival changed from Sep-18-2025 10:28 AM to Sep-18-2025 10:24 AM
18 Sep
13:00
09:00
09:00
Time Adjustment
Estimated Runway Arrival changed from Sep-18-2025 10:00 AM to Sep-18-2025 10:08 AM
18 Sep
12:59
08:59
08:59
Time Adjustment
Estimated Runway Departure changed from Sep-18-2025 9:06 AM to Sep-18-2025 8:59 AM
Actual Runway Departure changed to Sep-18-2025 8:59 AM
Estimated Runway Arrival changed from Sep-18-2025 10:20 AM to Sep-18-2025 10:00 AM
18 Sep
12:55
08:55
08:55
Time Adjustment
Estimated Runway Arrival changed from Sep-18-2025 10:05 AM to Sep-18-2025 10:20 AM
18 Sep
12:40
08:40
08:40
Status Active
Estimated Gate Departure changed from Sep-18-2025 8:45 AM to Sep-18-2025 8:38 AM
Actual Gate Departure changed to Sep-18-2025 8:38 AM
Status changed from Scheduled to Active
18 Sep
12:40
08:40
08:40
Time Adjustment
Estimated Runway Arrival changed from Sep-18-2025 10:24 AM to Sep-18-2025 10:05 AM
18 Sep
12:40
08:40
08:40
Time Adjustment
Estimated Runway Arrival changed to Sep-18-2025 10:24 AM
18 Sep
11:32
07:32
07:32
Time Adjustment
Estimated Runway Departure changed to Sep-18-2025 9:06 AM
18 Sep
09:48
05:48
05:48
Gate Adjustment
Baggage changed to 3
18 Sep
09:16
05:16
05:16
Gate Adjustment
Arrival Gate changed to 11
17 Sep
17:34
13:34
13:34
Equipment Adjustment
Tail Number changed from N14186 to N21144
17 Sep
16:53
12:53
12:53
Equipment Adjustment
Tail Number changed from N11192 to N14186
17 Sep
14:16
10:16
10:16
Gate Adjustment
Departure Gate changed from A4E to A4A
17 Sep
14:10
10:10
10:10
Equipment Adjustment
Tail Number changed from N17138 to N11192
17 Sep
12:51
08:51
08:51
Time Adjustment
Scheduled Runway Departure changed from Sep-18-2025 8:51 AM to Sep-18-2025 9:06 AM
Scheduled Runway Arrival changed from Sep-18-2025 9:52 AM to Sep-18-2025 10:24 AM
17 Sep
12:46
08:46
08:46
Time Adjustment
Scheduled Runway Departure changed to Sep-18-2025 8:51 AM
Scheduled Runway Arrival changed to Sep-18-2025 9:52 AM
17 Sep
11:40
07:40
07:40
Gate Adjustment
Departure Gate changed to A4E
17 Sep
10:10
06:10
06:10
Equipment Adjustment
Tail Number changed from N33182 to N17138
17 Sep
09:10
05:10
05:10
Equipment Adjustment
Tail Number changed from N31131 to N33182
17 Sep
05:46
01:46
01:46
Time Adjustment
Estimated Gate Departure changed to Sep-18-2025 8:45 AM
Estimated Gate Arrival changed to Sep-18-2025 10:28 AM
Tail Number changed to N31131
Actual Equipment changed to E45
15 Sep
18:50
14:50
14:50
Record Created
15 Sep
18:50
14:50
14:50
Time Adjustment
Scheduled Gate Departure changed to Sep-18-2025 8:45 AM
Scheduled Gate Arrival changed to Sep-18-2025 10:28 AM
Scheduled Equipment changed to ERJ