(UA) United Airlines 4257 Flight Details
On time | Scheduled
Departure
IAD
Washington Dulles International Airport, VA, US
Flight Gate Times
10-Mar-2026
Scheduled
09:00
EDT
Estimated
09:00
EDT
Total Departure Delay: -
Flight Runway Times
10-Mar-2026
Scheduled
09:21
EDT
Actual
--
Runway Delay: -
Terminal
-
Gate
A4A
Craft Type
Embraer EMB-145XR
E45
Flight Time
Scheduled
1h 49m
Arrival
TYS
Knoxville McGhee Tyson Airport, TN, US
Flight Gate Times
10-Mar-2026
Scheduled
10:49
EDT
Estimated
10:49
EDT
Total Arrival Delay: -
Flight Runway Times
10-Mar-2026
Scheduled
10:45
EDT
Actual
--
Runway Delay: -
Terminal
-
Gate
-
Baggage Claim
-
Tail Number
N16151
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
9 Mar
22:20
18:20
18:20
Gate Adjustment
Departure Gate changed from A1 to A4A
9 Mar
16:20
12:20
12:20
Gate Adjustment
Departure Gate changed from 1 to A1
Tail Number changed from N33182 to N16151
9 Mar
15:36
11:36
11:36
Gate Adjustment
Departure Gate changed from A1 to 1
9 Mar
15:20
11:20
11:20
Gate Adjustment
Departure Gate changed from A1C to A1
9 Mar
13:07
09:07
09:07
Time Adjustment
Scheduled Runway Departure changed from Mar-10-2026 9:07 AM to Mar-10-2026 9:21 AM
Scheduled Runway Arrival changed from Mar-10-2026 10:09 AM to Mar-10-2026 10:45 AM
9 Mar
13:01
09:01
09:01
Time Adjustment
Scheduled Runway Departure changed to Mar-10-2026 9:07 AM
Scheduled Runway Arrival changed to Mar-10-2026 10:09 AM
9 Mar
11:14
07:14
07:14
Gate Adjustment
Departure Gate changed from C22 to A1C
9 Mar
10:02
06:02
06:02
Equipment Adjustment
Tail Number changed from N12163 to N33182
9 Mar
09:56
05:56
05:56
Equipment Adjustment
Tail Number changed from N12175 to N12163
9 Mar
09:02
05:02
05:02
Gate Adjustment
Departure Gate changed from 22 to C22
Tail Number changed from N12163 to N12175
9 Mar
06:08
02:08
02:08
Gate Adjustment
Departure Gate changed from C22 to 22
9 Mar
05:50
01:50
01:50
Time Adjustment
Estimated Gate Departure changed to Mar-10-2026 9:00 AM
Estimated Gate Arrival changed to Mar-10-2026 10:49 AM
Tail Number changed to N12163
Actual Equipment changed to E45
9 Mar
05:50
01:50
01:50
Gate Adjustment
Departure Gate changed to C22
7 Mar
18:44
13:44
13:44
Record Created
7 Mar
18:44
13:44
13:44
Time Adjustment
Scheduled Gate Departure changed to Mar-10-2026 9:00 AM
Scheduled Gate Arrival changed to Mar-10-2026 10:49 AM
Scheduled Equipment changed to ERJ