(UA) United Airlines 4257 Flight Details
On time | Scheduled
Departure
IAD
Washington Dulles International Airport, VA, US
Flight Gate Times
31-Jan-2026
Scheduled
09:00
EST
Estimated
09:00
EST
Total Departure Delay: -
Flight Runway Times
31-Jan-2026
Scheduled
09:21
EST
Actual
--
Runway Delay: -
Terminal
-
Gate
A4C
Craft Type
Embraer EMB-145XR
E45
Flight Time
Scheduled
1h 57m
Arrival
TYS
Knoxville McGhee Tyson Airport, TN, US
Flight Gate Times
31-Jan-2026
Scheduled
10:57
EST
Estimated
10:57
EST
Total Arrival Delay: -
Flight Runway Times
31-Jan-2026
Scheduled
10:53
EST
Actual
--
Runway Delay: -
Terminal
-
Gate
11
Baggage Claim
3
Tail Number
N16178
Flight Time
Estimated
1h 57m
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 Jan
10:09
05:09
05:09
Gate Adjustment
Arrival Gate changed to 11
Baggage changed to 3
31 Jan
09:26
04:26
04:26
Equipment Adjustment
Tail Number changed from N16147 to N16178
31 Jan
08:21
03:21
03:21
Gate Adjustment
Departure Gate changed from A4E to A4C
31 Jan
06:51
01:51
01:51
Gate Adjustment
Departure Gate changed from A1 to A4E
31 Jan
06:50
01:50
01:50
Gate Adjustment
Departure Gate changed from 1 to A1
Tail Number changed from N14203 to N16147
31 Jan
00:41
19:41
19:41
Gate Adjustment
Departure Gate changed from A1 to 1
31 Jan
00:27
19:27
19:27
Gate Adjustment
Departure Gate changed from A6A to A1
30 Jan
14:06
09:06
09:06
Time Adjustment
Scheduled Runway Departure changed from Jan-31-2026 9:11 AM to Jan-31-2026 9:21 AM
Scheduled Runway Arrival changed from Jan-31-2026 10:16 AM to Jan-31-2026 10:53 AM
30 Jan
14:01
09:01
09:01
Time Adjustment
Scheduled Runway Departure changed to Jan-31-2026 9:11 AM
Scheduled Runway Arrival changed to Jan-31-2026 10:16 AM
30 Jan
06:50
01:50
01:50
Gate Adjustment
Departure Gate changed to A6A
29 Jan
18:57
13:57
13:57
Time Adjustment
Estimated Gate Departure changed to Jan-31-2026 9:00 AM
Estimated Gate Arrival changed to Jan-31-2026 10:57 AM
Tail Number changed to N14203
Actual Equipment changed to E45
28 Jan
18:43
13:43
13:43
Record Created
28 Jan
18:43
13:43
13:43
Time Adjustment
Scheduled Gate Departure changed to Jan-31-2026 9:00 AM
Scheduled Gate Arrival changed to Jan-31-2026 10:57 AM
Scheduled Equipment changed to ERJ