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(UA) United Airlines 4257 Flight Details

On time | Arrived

Departure

IAD

Washington Dulles International Airport, VA, US

Flight Gate Times

01-Mar-2026

Scheduled

09:00

 EST

Actual

08:51

 EST

Total Departure Delay: -

Flight Runway Times

01-Mar-2026

Scheduled

09:21

 EST

Actual

09:07

 EST

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

01-Mar-2026

Scheduled

10:49

 EST

Actual

10:18

 EST

Total Arrival Delay: -

Flight Runway Times

01-Mar-2026

Scheduled

10:45

 EST

Actual

10:14

 EST

Runway Delay: -

Terminal

-

Gate

-

Baggage Claim

-

Tail Number

N27190

Flight Time

Actual

1h 27m

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

1 Mar

15:22

Estimated Gate Arrival changed from Mar-01-2026 10:21 AM to Mar-01-2026 10:18 AM

Actual Gate Arrival changed to Mar-01-2026 10:18 AM

1 Mar

15:20

Estimated Gate Arrival changed from Mar-01-2026 10:26 AM to Mar-01-2026 10:21 AM

1 Mar

15:16

Estimated Runway Arrival changed from Mar-01-2026 10:15 AM to Mar-01-2026 10:14 AM

Actual Runway Arrival changed from Mar-01-2026 10:15 AM to Mar-01-2026 10:14 AM

1 Mar

15:15

Estimated Runway Arrival changed from Mar-01-2026 10:22 AM to Mar-01-2026 10:15 AM

Actual Runway Arrival changed to Mar-01-2026 10:15 AM

Status changed from Active to Landed

1 Mar

14:14

Estimated Runway Arrival changed from Mar-01-2026 10:14 AM to Mar-01-2026 10:22 AM

Estimated Gate Arrival changed from Mar-01-2026 10:49 AM to Mar-01-2026 10:26 AM

1 Mar

14:10

Estimated Runway Arrival changed from Mar-01-2026 10:10 AM to Mar-01-2026 10:14 AM

1 Mar

14:08

Estimated Runway Departure changed from Mar-01-2026 9:21 AM to Mar-01-2026 9:07 AM

Actual Runway Departure changed to Mar-01-2026 9:07 AM

Estimated Runway Arrival changed from Mar-01-2026 10:22 AM to Mar-01-2026 10:10 AM

1 Mar

13:56

Estimated Gate Departure changed from Mar-01-2026 9:00 AM to Mar-01-2026 8:51 AM

Actual Gate Departure changed to Mar-01-2026 8:51 AM

Status changed from Scheduled to Active

1 Mar

13:52

Estimated Runway Arrival changed from Mar-01-2026 10:45 AM to Mar-01-2026 10:22 AM

1 Mar

10:38

Departure Gate changed from A3A to A1C

1 Mar

10:38

Tail Number changed from N21129 to N27190

1 Mar

10:37

Estimated Runway Departure changed to Mar-01-2026 9:21 AM

Estimated Runway Arrival changed to Mar-01-2026 10:45 AM

1 Mar

06:50

Tail Number changed from N14179 to N21129

28 Feb

15:02

Departure Gate changed from A4E to A3A

28 Feb

14:50

Tail Number changed from N14186 to N14179

28 Feb

14:07

Scheduled Runway Departure changed from Mar-01-2026 9:09 AM to Mar-01-2026 9:21 AM

Scheduled Runway Arrival changed from Mar-01-2026 10:12 AM to Mar-01-2026 10:45 AM

28 Feb

14:01

Scheduled Runway Departure changed to Mar-01-2026 9:09 AM

Scheduled Runway Arrival changed to Mar-01-2026 10:12 AM

28 Feb

12:26

Departure Gate changed from A4C to A4E

28 Feb

12:20

Departure Gate changed from A4B to A4C

28 Feb

12:20

Departure Gate changed from A4C to A4B

28 Feb

12:15

Departure Gate changed to A4C

28 Feb

06:50

Estimated Gate Departure changed to Mar-01-2026 9:00 AM

Estimated Gate Arrival changed to Mar-01-2026 10:49 AM

Tail Number changed to N14186

Actual Equipment changed to E45

26 Feb

18:48

26 Feb

18:48

Scheduled Gate Departure changed to Mar-01-2026 9:00 AM

Scheduled Gate Arrival changed to Mar-01-2026 10:49 AM

Scheduled Equipment changed to ERJ