(UA) United Airlines 4257 Flight Details
On time | Scheduled
Departure
IAD
Washington Dulles International Airport, VA, US
Flight Gate Times
23-Feb-2026
Scheduled
09:00
EST
Estimated
09:00
EST
Total Departure Delay: -
Flight Runway Times
23-Feb-2026
Scheduled
09:21
EST
Actual
--
Runway Delay: -
Terminal
-
Gate
A1
Craft Type
Embraer EMB-145XR
E45
Flight Time
Scheduled
1h 49m
Arrival
TYS
Knoxville McGhee Tyson Airport, TN, US
Flight Gate Times
23-Feb-2026
Scheduled
10:49
EST
Estimated
10:49
EST
Total Arrival Delay: -
Flight Runway Times
23-Feb-2026
Scheduled
10:45
EST
Actual
--
Runway Delay: -
Terminal
-
Gate
11
Baggage Claim
-
Tail Number
N24128
Flight Time
Estimated
1h 49m
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 Feb
07:10
02:10
02:10
Gate Adjustment
Departure Gate changed from 1 to A1
Arrival Gate changed to 11
23 Feb
03:58
22:58
22:58
Gate Adjustment
Departure Gate changed from A1 to 1
23 Feb
03:34
22:34
22:34
Gate Adjustment
Departure Gate changed from A4B to A1
23 Feb
03:34
22:34
22:34
Gate Adjustment
Departure Gate changed from A4A to A4B
23 Feb
02:34
21:34
21:34
Equipment Adjustment
Tail Number changed from N12167 to N24128
23 Feb
02:28
21:28
21:28
Gate Adjustment
Departure Gate changed from C28 to A4A
23 Feb
02:28
21:28
21:28
Gate Adjustment
Departure Gate changed from A1 to C28
23 Feb
02:16
21:16
21:16
Gate Adjustment
Departure Gate changed from A1C to A1
23 Feb
01:10
20:10
20:10
Gate Adjustment
Departure Gate changed from A4A to A1C
22 Feb
18:27
13:27
13:27
Gate Adjustment
Departure Gate changed from A4B to A4A
22 Feb
17:22
12:22
12:22
Gate Adjustment
Departure Gate changed from A4A to A4B
22 Feb
17:10
12:10
12:10
Gate Adjustment
Departure Gate changed from A3C to A4A
22 Feb
17:10
12:10
12:10
Gate Adjustment
Departure Gate changed from A4B to A3C
22 Feb
17:04
12:04
12:04
Gate Adjustment
Departure Gate changed from A2E to A4B
22 Feb
14:06
09:06
09:06
Time Adjustment
Scheduled Runway Departure changed from Feb-23-2026 9:08 AM to Feb-23-2026 9:21 AM
Scheduled Runway Arrival changed from Feb-23-2026 10:14 AM to Feb-23-2026 10:45 AM
22 Feb
14:01
09:01
09:01
Time Adjustment
Scheduled Runway Departure changed to Feb-23-2026 9:08 AM
Scheduled Runway Arrival changed to Feb-23-2026 10:14 AM
22 Feb
12:22
07:22
07:22
Gate Adjustment
Departure Gate changed from A2F to A2E
22 Feb
02:22
21:22
21:22
Gate Adjustment
Departure Gate changed from A4C to A2F
21 Feb
20:52
15:52
15:52
Equipment Adjustment
Tail Number changed from N14198 to N12167
21 Feb
18:40
13:40
13:40
Equipment Adjustment
Tail Number changed from N14168 to N14198
21 Feb
17:41
12:41
12:41
Time Adjustment
Estimated Gate Departure changed to Feb-23-2026 9:00 AM
Estimated Gate Arrival changed to Feb-23-2026 10:49 AM
Tail Number changed to N14168
Actual Equipment changed to E45
21 Feb
17:41
12:41
12:41
Gate Adjustment
Departure Gate changed to A4C
20 Feb
18:49
13:49
13:49
Record Created
20 Feb
18:49
13:49
13:49
Time Adjustment
Scheduled Gate Departure changed to Feb-23-2026 9:00 AM
Scheduled Gate Arrival changed to Feb-23-2026 10:49 AM
Scheduled Equipment changed to ERJ