United Airlines UA4257 flight status now

Current status of UA4257 is Scheduled On time Estimated Depart in 8 hours, 42 minutes

UA4257 - UAL4257 United Airlines (UA)
IAD Dulles United States
Flight IAD to TYS
TYS Knoxville United States
Scheduled On time Estimated Depart in 8 hours, 42 minutes
Departure Washington Dulles International Airport
IATA: IADICAO: KIAD
Scheduled 09:00 18 November 2025
Estimated 09:00 18 November 2025
None A4F
Arrival McGhee Tyson Airport
IATA: TYSICAO: KTYS
Scheduled 10:48 18 November 2025
Estimated 10:48 18 November 2025
None None
UA4257 Detail
  • Type: Domestic Flight
  • Code Shares: AC 4741, AV 2346, CM 2237
  • Flight Duration: 1 hours 48 minutes
  • Flight Distance: 676 kms / 420 miles
Airline
  • United Airlines
  • IATA: UA
  • ICAO: UAL
  • Operating Days: Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday
Passenger Services
  • Service type: Normal passenger
  • Seats: 50
  • Freight capacity: 1.5 tons
  • Passenger classes: Economy, Shuttle, Premium Economy
More Detail
  • Aircraft: Embraer EMB-145XR
  • Callsign: F-KLEX4
  • Departure Timezone: America/New_York
  • Arrival Timezone: America/New_York
  • Current Time in Dulles: Tuesday 2025-11-18 00:18 AM
  • Current Time in Knoxville: Tuesday 2025-11-18 00:18 AM

Domestic flight United Airlines UA4257 takes off from Dulles (IAD) United States to Knoxville (TYS) United States. It's operated by United Airlines. The plane leaves Washington Dulles International Airport at 09:00 18 November 2025 America/New_York. The flight is expected to land at McGhee Tyson Airport at 10:48 18 November 2025 America/New_York. The flight will last about 1 hours 48 minutes.

United Airlines UA4257 Flight Statistics

United Airlines
United Airlines
FLIGHT NO UA4257
AIRPLANE Embraer EMB-145XR
ON TIME 12
DELAYED 2
CANCELLED 0
ON TIME 27
DELAYED 3
CANCELLED 0
ON TIME 52
DELAYED 8
CANCELLED 0
ON TIME 74
DELAYED 10
CANCELLED 0
Last 14 days flight data
14 30 60 90
On Time Rate

United Airlines UA4257 Flight Schedule and Histories

Time Departure Arrival Actual departure Actual arrival
Mon 17 Nov
Scheduled On time
Dulles (IAD) 2025-11-17T09:00
Knoxville (TYS) 2025-11-17T10:48
Sun 16 Nov
Arrived On time
Dulles (IAD) 2025-11-16T09:00
Knoxville (TYS) 2025-11-16T10:48
2025-11-16T08:50
2025-11-16T10:47
Fri 14 Nov
Arrived On time
Dulles (IAD) 2025-11-14T09:00
Knoxville (TYS) 2025-11-14T10:48
2025-11-14T08:49
2025-11-14T10:13
Wed 12 Nov
Arrived On time
Dulles (IAD) 2025-11-12T09:00
Knoxville (TYS) 2025-11-12T10:48
2025-11-12T08:50
2025-11-12T10:33
Sun 09 Nov
Arrived On time
Dulles (IAD) 2025-11-09T09:00
Knoxville (TYS) 2025-11-09T10:48
2025-11-09T08:51
2025-11-09T10:37
Sat 08 Nov
Scheduled On time
Dulles (IAD) 2025-11-08T09:00
Knoxville (TYS) 2025-11-08T10:48
Wed 22 Oct
Arrived On time
Dulles (IAD) 2025-10-22T08:45
Knoxville (TYS) 2025-10-22T10:29
2025-10-22T08:36
2025-10-22T10:14
Sun 19 Oct
Scheduled On time
Dulles (IAD) 2025-10-19T08:45
Knoxville (TYS) 2025-10-19T10:29
Tue 30 Sep
Scheduled On time
Dulles (IAD) 2025-09-30T08:45
Knoxville (TYS) 2025-09-30T10:29
Mon 29 Sep
Arrived On time
Dulles (IAD) 2025-09-29T08:45
Knoxville (TYS) 2025-09-29T10:29
2025-09-29T08:33
2025-09-29T10:08

Similar flight route from Dulles (IAD) to Knoxville (TYS)

Airline Flight no Departure Arrival
United Airlines UA4304
United Airlines 		18/11/2025
22:15 		1 hours 44 minutes
23:59
Copa Airlines CM2237
Copa Airlines 		18/11/2025
09:00 		1 hours 48 minutes
10:48
United Airlines UA4914
United Airlines 		18/11/2025
18:36 		1 hours 44 minutes
20:20
Allegiant Air G43044
Allegiant Air 		18/11/2025
16:56 		1 hours 40 minutes
18:36
Avianca AV2346
Avianca 		18/11/2025
22:15 		1 hours 44 minutes
23:59
Avianca AV2348
Avianca 		18/11/2025
18:36 		1 hours 44 minutes
20:20
Lufthansa LH8966
Lufthansa 		18/11/2025
18:36 		1 hours 44 minutes
20:20
Lufthansa LH9312
Lufthansa 		18/11/2025
22:15 		1 hours 44 minutes
23:59

Frequently asked questions, answered

How long is the flight from Dulles to Knoxville?

On average, nonstop flight takes 1 hour(s) 48 minutes, with the flight distance of 676 km (420 miles).

What type of aircraft is used for the United Airlines UA4257 flight?

All United Airlines UA4257 flights are operated using Embraer EMB-145XR aircraft.

How many United Airlines UA4257 flights are operated a week?

7 flights per week. The Flight United Airlines UA4257 is operated on Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday .