(UA) United Airlines 4257 Flight Details
On time | Scheduled
Departure
IAD
Washington Dulles International Airport, VA, US
Flight Gate Times
30-Mar-2026
Scheduled
09:00
EDT
Estimated
09:00
EDT
Total Departure Delay: -
Flight Runway Times
30-Mar-2026
Scheduled
09:21
EDT
Actual
--
Runway Delay: -
Terminal
-
Gate
A3C
Craft Type
Embraer EMB-145XR
E45
Flight Time
Scheduled
1h 50m
Arrival
TYS
Knoxville McGhee Tyson Airport, TN, US
Flight Gate Times
30-Mar-2026
Scheduled
10:50
EDT
Estimated
10:50
EDT
Total Arrival Delay: -
Flight Runway Times
30-Mar-2026
Scheduled
10:46
EDT
Actual
--
Runway Delay: -
Terminal
-
Gate
-
Baggage Claim
-
Tail Number
N14203
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
30 Mar
02:50
22:50
22:50
Gate Adjustment
Departure Gate changed from A4E to A3C
30 Mar
02:46
22:46
22:46
Time Adjustment
Scheduled Runway Departure changed to Mar-30-2026 9:21 AM
Scheduled Runway Arrival changed to Mar-30-2026 10:46 AM
29 Mar
21:44
17:44
17:44
Gate Adjustment
Departure Gate changed from A4F to A4E
29 Mar
19:50
15:50
15:50
Equipment Adjustment
Tail Number changed from N14148 to N14203
29 Mar
05:51
01:51
01:51
Gate Adjustment
Departure Gate changed from A6A to A4F
29 Mar
05:50
01:50
01:50
Equipment Adjustment
Tail Number changed from N17196 to N14148
29 Mar
05:50
01:50
01:50
Gate Adjustment
Departure Gate changed from A4A to A6A
28 Mar
20:26
16:26
16:26
Time Adjustment
Estimated Gate Departure changed to Mar-30-2026 9:00 AM
Estimated Gate Arrival changed to Mar-30-2026 10:50 AM
Departure Gate changed to A4A
Tail Number changed to N17196
Actual Equipment changed to E45
27 Mar
18:48
14:48
14:48
Record Created
27 Mar
18:48
14:48
14:48
Time Adjustment
Scheduled Gate Departure changed to Mar-30-2026 9:00 AM
Scheduled Gate Arrival changed to Mar-30-2026 10:50 AM
Scheduled Equipment changed to ERJ