United Airlines flight UA 4251: Multiple routes

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Daily 06:00 Greensboro/High Point (GSO) 07:16 Washington Dulles (IAD)
UA 4251 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:16 Effective 2026-03-29 through 2026-10-24
Daily 09:00 Knoxville (TYS) 10:45 Houston George Bush (IAH) B
UA 4251 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 2:45 Effective 2026-03-05 through 2026-03-28
Daily 17:38 Washington Dulles (IAD) 19:15 Providence (PVD)
UA 4251 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:37 Effective 2026-02-12 through 2026-03-04
Daily 17:39 Washington Dulles (IAD) 19:16 Providence (PVD)
UA 4251 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 1:37 Effective 2026-01-06 through 2026-02-11
Daily 22:10 Washington Dulles (IAD) 23:31 Huntsville (HSV)
UA 4251 Non-stop Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ) 2:21 Valid until 2026-01-05
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This flight number is listed as serving the following routes:


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United Airlines flight UA 4251: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
United Airlines UA4251
06:00
Greensboro/High Point (GSO)

07:16
Washington Dulles (IAD)
Effective 2026-03-29 through 2026-10-24
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:16, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)
Direct Flights:
United Airlines UA4251
09:00
Knoxville (TYS)

10:45
Houston George Bush (IAH) B
Effective 2026-03-05 through 2026-03-28
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:45, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)
Direct Flights:
United Airlines UA4251
17:38
Washington Dulles (IAD)

19:15
Providence (PVD)
Effective 2026-02-12 through 2026-03-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:37, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)
Direct Flights:
United Airlines UA4251
17:39
Washington Dulles (IAD)

19:16
Providence (PVD)
Effective 2026-01-06 through 2026-02-11
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:37, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)
Direct Flights:
United Airlines UA4251
22:10
Washington Dulles (IAD)

23:31
Huntsville (HSV)
Valid until 2026-01-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:21, non-stop
Embraer ERJ 135 / ERJ 140 / ERJ 145 (ERJ)
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This flight number is listed as serving the following routes:
  • Greensboro/High Point (GSO) - Washington Dulles (IAD)
  • Knoxville (TYS) - Houston George Bush (IAH)
  • Washington Dulles (IAD) - Huntsville (HSV)
  • Washington Dulles (IAD) - Providence (PVD)
All United Airlines flights
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