(UA) United Airlines 4257 Flight Details
On time | Scheduled
Departure
IAD
Washington Dulles International Airport, VA, US
Flight Gate Times
28-Mar-2026
Scheduled
09:00
EDT
Estimated
09:00
EDT
Total Departure Delay: -
Flight Runway Times
28-Mar-2026
Scheduled
09:21
EDT
Actual
--
Runway Delay: -
Terminal
-
Gate
A4F
Craft Type
Embraer EMB-145XR
E45
Flight Time
Scheduled
1h 49m
Arrival
TYS
Knoxville McGhee Tyson Airport, TN, US
Flight Gate Times
28-Mar-2026
Scheduled
10:49
EDT
Estimated
10:49
EDT
Total Arrival Delay: -
Flight Runway Times
28-Mar-2026
Scheduled
10:45
EDT
Actual
--
Runway Delay: -
Terminal
-
Gate
-
Baggage Claim
-
Tail Number
N17138
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
28 Mar
06:38
02:38
02:38
Gate Adjustment
Departure Gate changed from A5A to A4F
28 Mar
05:50
01:50
01:50
Equipment Adjustment
Tail Number changed from N23139 to N17138
27 Mar
23:32
19:32
19:32
Time Adjustment
Scheduled Runway Departure changed to Mar-28-2026 9:21 AM
Scheduled Runway Arrival changed to Mar-28-2026 10:45 AM
27 Mar
22:08
18:08
18:08
Gate Adjustment
Departure Gate changed from A1C to A5A
27 Mar
19:08
15:08
15:08
Gate Adjustment
Departure Gate changed from A1 to A1C
27 Mar
05:50
01:50
01:50
Equipment Adjustment
Tail Number changed from N12167 to N23139
26 Mar
20:33
16:33
16:33
Time Adjustment
Estimated Gate Departure changed to Mar-28-2026 9:00 AM
Estimated Gate Arrival changed to Mar-28-2026 10:49 AM
Departure Gate changed to A1
Tail Number changed to N12167
Actual Equipment changed to E45
25 Mar
18:44
14:44
14:44
Record Created
25 Mar
18:44
14:44
14:44
Time Adjustment
Scheduled Gate Departure changed to Mar-28-2026 9:00 AM
Scheduled Gate Arrival changed to Mar-28-2026 10:49 AM
Scheduled Equipment changed to ERJ