(UA) United Airlines 4257 Flight Details
On time | Scheduled
Departure
IAD
Washington Dulles International Airport, VA, US
Flight Gate Times
26-Feb-2026
Scheduled
09:00
EST
Estimated
09:00
EST
Total Departure Delay: -
Flight Runway Times
26-Feb-2026
Scheduled
09:21
EST
Actual
--
Runway Delay: -
Terminal
-
Gate
A2E
Craft Type
Embraer EMB-145XR
E45
Flight Time
Scheduled
1h 49m
Arrival
TYS
Knoxville McGhee Tyson Airport, TN, US
Flight Gate Times
26-Feb-2026
Scheduled
10:49
EST
Estimated
10:49
EST
Total Arrival Delay: -
Flight Runway Times
26-Feb-2026
Scheduled
10:45
EST
Actual
--
Runway Delay: -
Terminal
-
Gate
-
Baggage Claim
-
Tail Number
N17159
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
26 Feb
06:50
01:50
01:50
Equipment Adjustment
Tail Number changed from N12145 to N17159
25 Feb
14:06
09:06
09:06
Time Adjustment
Scheduled Runway Departure changed from Feb-26-2026 9:09 AM to Feb-26-2026 9:21 AM
Scheduled Runway Arrival changed from Feb-26-2026 10:16 AM to Feb-26-2026 10:45 AM
25 Feb
14:01
09:01
09:01
Time Adjustment
Scheduled Runway Departure changed to Feb-26-2026 9:09 AM
Scheduled Runway Arrival changed to Feb-26-2026 10:16 AM
25 Feb
13:39
08:39
08:39
Equipment Adjustment
Tail Number changed from N16151 to N12145
25 Feb
11:44
06:44
06:44
Gate Adjustment
Departure Gate changed from A2F to A2E
25 Feb
06:52
01:52
01:52
Gate Adjustment
Departure Gate changed to A2F
25 Feb
06:46
01:46
01:46
Time Adjustment
Estimated Gate Departure changed to Feb-26-2026 9:00 AM
Estimated Gate Arrival changed to Feb-26-2026 10:49 AM
Tail Number changed to N16151
Actual Equipment changed to E45
23 Feb
21:48
16:48
16:48
Record Created
23 Feb
21:48
16:48
16:48
Time Adjustment
Scheduled Gate Departure changed to Feb-26-2026 9:00 AM
Scheduled Gate Arrival changed to Feb-26-2026 10:49 AM
Scheduled Equipment changed to ERJ