(UA) United Airlines 4257 Flight Details
On time | Scheduled
Departure
IAD
Washington Dulles International Airport, VA, US
Flight Gate Times
01-Apr-2026
Scheduled
09:00
EDT
Estimated
09:00
EDT
Total Departure Delay: -
Flight Runway Times
01-Apr-2026
Scheduled
09:21
EDT
Actual
--
Runway Delay: -
Terminal
-
Gate
A6A
Craft Type
Embraer EMB-145XR
E45
Flight Time
Scheduled
1h 50m
Arrival
TYS
Knoxville McGhee Tyson Airport, TN, US
Flight Gate Times
01-Apr-2026
Scheduled
10:50
EDT
Estimated
10:50
EDT
Total Arrival Delay: -
Flight Runway Times
01-Apr-2026
Scheduled
10:46
EDT
Actual
--
Runway Delay: -
Terminal
-
Gate
-
Baggage Claim
-
Tail Number
N16170
Flight Time
Estimated
1h 50m
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
31 Mar
18:38
14:38
14:38
Gate Adjustment
Departure Gate changed from A6A to A4E
31 Mar
18:38
14:38
14:38
Gate Adjustment
Departure Gate changed from A4E to A6A
31 Mar
13:06
09:06
09:06
Time Adjustment
Scheduled Runway Departure changed to Apr-01-2026 9:21 AM
Scheduled Runway Arrival changed to Apr-01-2026 10:46 AM
31 Mar
11:14
07:14
07:14
Gate Adjustment
Departure Gate changed to A6A
30 Mar
17:38
13:38
13:38
Equipment Adjustment
Tail Number changed from N11164 to N16170
30 Mar
05:50
01:50
01:50
Time Adjustment
Estimated Gate Departure changed to Apr-01-2026 9:00 AM
Estimated Gate Arrival changed to Apr-01-2026 10:50 AM
Tail Number changed to N11164
Actual Equipment changed to E45
29 Mar
18:47
14:47
14:47
Record Created
29 Mar
18:47
14:47
14:47
Time Adjustment
Scheduled Gate Departure changed to Apr-01-2026 9:00 AM
Scheduled Gate Arrival changed to Apr-01-2026 10:50 AM
Scheduled Equipment changed to ERJ