(UA) United Airlines 4257 Flight Details
On time | Scheduled
Departure
IAD
Washington Dulles International Airport, VA, US
Flight Gate Times
16-Mar-2026
Scheduled
09:00
EDT
Estimated
09:00
EDT
Total Departure Delay: -
Flight Runway Times
16-Mar-2026
Scheduled
09:21
EDT
Estimated
09:21
EDT
Runway Delay: -
Terminal
-
Gate
A6A
Craft Type
Embraer EMB-145XR
E45
Flight Time
Scheduled
1h 49m
Arrival
TYS
Knoxville McGhee Tyson Airport, TN, US
Flight Gate Times
16-Mar-2026
Scheduled
10:49
EDT
Estimated
10:49
EDT
Total Arrival Delay: -
Flight Runway Times
16-Mar-2026
Scheduled
10:45
EDT
Estimated
10:45
EDT
Runway Delay: -
Terminal
-
Gate
11
Baggage Claim
3
Tail Number
N17196
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
16 Mar
10:33
06:33
06:33
Gate Adjustment
Arrival Gate changed to 11
Baggage changed to 3
16 Mar
10:30
06:30
06:30
Time Adjustment
Estimated Runway Arrival changed to Mar-16-2026 10:45 AM
16 Mar
10:30
06:30
06:30
Time Adjustment
Estimated Runway Departure changed to Mar-16-2026 9:21 AM
16 Mar
06:26
02:26
02:26
Gate Adjustment
Departure Gate changed from A4A to A6A
15 Mar
18:08
14:08
14:08
Gate Adjustment
Departure Gate changed from 22 to A4A
15 Mar
17:14
13:14
13:14
Gate Adjustment
Departure Gate changed from A4A to 22
15 Mar
16:38
12:38
12:38
Equipment Adjustment
Tail Number changed from N12175 to N17196
15 Mar
16:20
12:20
12:20
Gate Adjustment
Departure Gate changed from A5C to A4A
15 Mar
13:06
09:06
09:06
Time Adjustment
Scheduled Runway Departure changed from Mar-16-2026 9:05 AM to Mar-16-2026 9:21 AM
Scheduled Runway Arrival changed from Mar-16-2026 10:09 AM to Mar-16-2026 10:45 AM
15 Mar
13:01
09:01
09:01
Time Adjustment
Scheduled Runway Departure changed to Mar-16-2026 9:05 AM
Scheduled Runway Arrival changed to Mar-16-2026 10:09 AM
15 Mar
11:20
07:20
07:20
Gate Adjustment
Departure Gate changed to A5C
15 Mar
05:51
01:51
01:51
Equipment Adjustment
Tail Number changed from N12201 to N12175
14 Mar
05:51
01:51
01:51
Time Adjustment
Estimated Gate Departure changed to Mar-16-2026 9:00 AM
Estimated Gate Arrival changed to Mar-16-2026 10:49 AM
Tail Number changed to N12201
Actual Equipment changed to E45
13 Mar
18:47
14:47
14:47
Record Created
13 Mar
18:47
14:47
14:47
Time Adjustment
Scheduled Gate Departure changed to Mar-16-2026 9:00 AM
Scheduled Gate Arrival changed to Mar-16-2026 10:49 AM
Scheduled Equipment changed to ERJ