(UA) United Airlines 4257 Flight Details
On time | Departed
Departure
IAD
Washington Dulles International Airport, VA, US
Flight Gate Times
07-Feb-2026
Scheduled
09:00
EST
Actual
08:59
EST
Total Departure Delay: -
Flight Runway Times
07-Feb-2026
Scheduled
09:21
EST
Estimated
09:21
EST
Runway Delay: -
Terminal
-
Gate
A2F
Craft Type
Embraer EMB-145XR
E45
Flight Time
Scheduled
1h 57m
Arrival
TYS
Knoxville McGhee Tyson Airport, TN, US
Flight Gate Times
07-Feb-2026
Scheduled
10:57
EST
Estimated
10:57
EST
Total Arrival Delay: -
Flight Runway Times
07-Feb-2026
Scheduled
10:53
EST
Estimated
10:35
EST
Runway Delay: -
Terminal
-
Gate
11
Baggage Claim
3
Tail Number
N12136
Flight Time
Estimated
1h 58m
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
7 Feb
14:03
09:03
09:03
Time Adjustment
Estimated Gate Arrival changed from Feb-07-2026 10:39 AM to Feb-07-2026 10:57 AM
7 Feb
14:00
09:00
09:00
Status Active
Estimated Gate Departure changed from Feb-07-2026 9:00 AM to Feb-07-2026 8:59 AM
Actual Gate Departure changed to Feb-07-2026 8:59 AM
Status changed from Scheduled to Active
7 Feb
14:00
09:00
09:00
Time Adjustment
Estimated Runway Arrival changed to Feb-07-2026 10:53 AM
7 Feb
14:00
09:00
09:00
Time Adjustment
Estimated Runway Arrival changed from Feb-07-2026 10:53 AM to Feb-07-2026 10:35 AM
Estimated Gate Arrival changed from Feb-07-2026 10:57 AM to Feb-07-2026 10:39 AM
7 Feb
12:45
07:45
07:45
Time Adjustment
Estimated Runway Departure changed to Feb-07-2026 9:21 AM
7 Feb
09:56
04:56
04:56
Gate Adjustment
Arrival Gate changed to 11
Baggage changed to 3
7 Feb
07:03
02:03
02:03
Gate Adjustment
Departure Gate changed from A5B to A2F
7 Feb
06:50
01:50
01:50
Equipment Adjustment
Tail Number changed from N11193 to N12136
7 Feb
05:56
00:56
00:56
Gate Adjustment
Departure Gate changed from A6B to A5B
7 Feb
05:09
00:09
00:09
Gate Adjustment
Departure Gate changed from A1C to A6B
7 Feb
04:32
23:32
23:32
Gate Adjustment
Departure Gate changed from A4C to A1C
7 Feb
00:08
19:08
19:08
Gate Adjustment
Departure Gate changed from A6A to A4C
6 Feb
14:06
09:06
09:06
Time Adjustment
Scheduled Runway Departure changed from Feb-07-2026 9:15 AM to Feb-07-2026 9:21 AM
Scheduled Runway Arrival changed from Feb-07-2026 10:19 AM to Feb-07-2026 10:53 AM
6 Feb
14:01
09:01
09:01
Time Adjustment
Scheduled Runway Departure changed to Feb-07-2026 9:15 AM
Scheduled Runway Arrival changed to Feb-07-2026 10:19 AM
6 Feb
12:56
07:56
07:56
Gate Adjustment
Departure Gate changed from A5C to A6A
6 Feb
06:50
01:50
01:50
Gate Adjustment
Departure Gate changed to A5C
5 Feb
21:26
16:26
16:26
Time Adjustment
Estimated Gate Departure changed to Feb-07-2026 9:00 AM
Estimated Gate Arrival changed to Feb-07-2026 10:57 AM
Tail Number changed to N11193
Actual Equipment changed to E45
4 Feb
18:44
13:44
13:44
Record Created
4 Feb
18:44
13:44
13:44
Time Adjustment
Scheduled Gate Departure changed to Feb-07-2026 9:00 AM
Scheduled Gate Arrival changed to Feb-07-2026 10:57 AM
Scheduled Equipment changed to ERJ