(UA) United Airlines 4257 Flight Details
On time | Scheduled
Departure
IAD
Washington Dulles International Airport, VA, US
Flight Gate Times
28-Feb-2026
Scheduled
09:00
EST
Estimated
09:00
EST
Total Departure Delay: -
Flight Runway Times
28-Feb-2026
Scheduled
09:21
EST
Actual
--
Runway Delay: -
Terminal
-
Gate
A1C
Craft Type
Embraer EMB-145XR
E45
Flight Time
Scheduled
1h 49m
Arrival
TYS
Knoxville McGhee Tyson Airport, TN, US
Flight Gate Times
28-Feb-2026
Scheduled
10:49
EST
Estimated
10:49
EST
Total Arrival Delay: -
Flight Runway Times
28-Feb-2026
Scheduled
10:45
EST
Actual
--
Runway Delay: -
Terminal
-
Gate
11
Baggage Claim
3
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
28 Feb
09:26
04:26
04:26
Gate Adjustment
Arrival Gate changed to 11
Baggage changed to 3
28 Feb
06:50
01:50
01:50
Equipment Adjustment
Tail Number changed from N14186 to N16151
28 Feb
03:21
22:21
22:21
Gate Adjustment
Departure Gate changed from 1 to A1C
27 Feb
14:07
09:07
09:07
Time Adjustment
Scheduled Runway Departure changed from Feb-28-2026 9:09 AM to Feb-28-2026 9:21 AM
Scheduled Runway Arrival changed from Feb-28-2026 10:14 AM to Feb-28-2026 10:45 AM
27 Feb
14:01
09:01
09:01
Time Adjustment
Scheduled Runway Departure changed to Feb-28-2026 9:09 AM
Scheduled Runway Arrival changed to Feb-28-2026 10:14 AM
27 Feb
12:58
07:58
07:58
Gate Adjustment
Departure Gate changed from A1C to 1
27 Feb
12:42
07:42
07:42
Gate Adjustment
Departure Gate changed from A1 to A1C
27 Feb
12:38
07:38
07:38
Gate Adjustment
Departure Gate changed from A1C to A1
27 Feb
12:32
07:32
07:32
Gate Adjustment
Departure Gate changed from A4F to A1C
27 Feb
06:50
01:50
01:50
Time Adjustment
Estimated Gate Departure changed to Feb-28-2026 9:00 AM
Estimated Gate Arrival changed to Feb-28-2026 10:49 AM
Tail Number changed to N14186
Actual Equipment changed to E45
27 Feb
06:50
01:50
01:50
Gate Adjustment
Departure Gate changed to A4F
25 Feb
18:45
13:45
13:45
Record Created
25 Feb
18:45
13:45
13:45
Time Adjustment
Scheduled Gate Departure changed to Feb-28-2026 9:00 AM
Scheduled Gate Arrival changed to Feb-28-2026 10:49 AM
Scheduled Equipment changed to ERJ