(UA) United Airlines 4257 Flight Details
On time | Scheduled
Departure
IAD
Washington Dulles International Airport, VA, US
Flight Gate Times
09-Mar-2026
Scheduled
09:00
EDT
Estimated
09:00
EDT
Total Departure Delay: -
Flight Runway Times
09-Mar-2026
Scheduled
09:21
EDT
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
09-Mar-2026
Scheduled
10:49
EDT
Estimated
10:49
EDT
Total Arrival Delay: -
Flight Runway Times
09-Mar-2026
Scheduled
10:45
EDT
Actual
--
Runway Delay: -
Terminal
-
Gate
-
Baggage Claim
-
Tail Number
N12167
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
8 Mar
13:06
09:06
09:06
Time Adjustment
Scheduled Runway Departure changed from Mar-09-2026 9:08 AM to Mar-09-2026 9:21 AM
Scheduled Runway Arrival changed from Mar-09-2026 10:13 AM to Mar-09-2026 10:45 AM
8 Mar
13:01
09:01
09:01
Time Adjustment
Scheduled Runway Departure changed to Mar-09-2026 9:08 AM
Scheduled Runway Arrival changed to Mar-09-2026 10:13 AM
8 Mar
11:44
07:44
07:44
Equipment Adjustment
Tail Number changed from N12195 to N12167
8 Mar
11:38
07:38
07:38
Gate Adjustment
Departure Gate changed to A2E
8 Mar
06:50
01:50
01:50
Equipment Adjustment
Tail Number changed from N17138 to N12195
7 Mar
06:50
01:50
01:50
Time Adjustment
Estimated Gate Departure changed to Mar-09-2026 9:00 AM
Estimated Gate Arrival changed to Mar-09-2026 10:49 AM
Tail Number changed to N17138
Actual Equipment changed to E45
6 Mar
18:48
13:48
13:48
Record Created
6 Mar
18:48
13:48
13:48
Time Adjustment
Scheduled Gate Departure changed to Mar-09-2026 9:00 AM
Scheduled Gate Arrival changed to Mar-09-2026 10:49 AM
Scheduled Equipment changed to ERJ