background

(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

Time

Date

UTC

Event

Data Updated

28 Mar

06:38

Departure Gate changed from A5A to A4F

28 Mar

05:50

Tail Number changed from N23139 to N17138

27 Mar

23:32

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

Departure Gate changed from A1C to A5A

27 Mar

19:08

Departure Gate changed from A1 to A1C

27 Mar

05:50

Tail Number changed from N12167 to N23139

26 Mar

20:33

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

25 Mar

18:44

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