United Airlines flight UA 4257: Dulles, Washington - Knoxville

Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Daily 08:15 Dulles, Washington (IAD) 10:07 Knoxville (TYS)
UA 4257 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:52 Effective 2025-01-07 through 2025-02-12
Daily 08:15 Dulles, Washington (IAD) 09:45 Knoxville (TYS)
UA 4257 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:30 Effective from 2025-02-13
Daily 08:45 Dulles, Washington (IAD) 10:26 Knoxville (TYS)
UA 4257 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:41 Valid until 2024-10-26
Daily 08:45 Dulles, Washington (IAD) 10:32 Knoxville (TYS)
UA 4257 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:47 Effective 2024-10-27 through 2024-12-18
Daily 08:45 Dulles, Washington (IAD) 10:39 Knoxville (TYS)
UA 4257 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:54 Effective 2024-12-19 through 2025-01-06


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United Airlines flight UA 4257:
Dulles, Washington - Knoxville
Select flight date:
FLIGHT SCHEDULE
Direct Flights:
United Airlines UA4257
08:15
Dulles, Washington (IAD)

10:07
Knoxville (TYS)
Effective 2025-01-07 through 2025-02-12
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:52, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)
United Airlines UA4257
08:15
Dulles, Washington (IAD)

09:45
Knoxville (TYS)
Effective from 2025-02-13
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:30, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)
United Airlines UA4257
08:45
Dulles, Washington (IAD)

10:26
Knoxville (TYS)
Valid until 2024-10-26
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:41, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)
United Airlines UA4257
08:45
Dulles, Washington (IAD)

10:32
Knoxville (TYS)
Effective 2024-10-27 through 2024-12-18
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:47, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)
United Airlines UA4257
08:45
Dulles, Washington (IAD)

10:39
Knoxville (TYS)
Effective 2024-12-19 through 2025-01-06
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:54, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)
  • UA 4257 is a domestic flight departing from the Dulles, Washington airport (IAD) and arriving at Knoxville airport (TYS).
  • The flight distance is 419 miles, or 675 km.
  • The timezone of both the departure and the arrival airports is UTC-5 . Current time at both airports is (loading...).
  • For direct flights, the flight time varies between 1:30 and 1:54.
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