| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Jul 18 | IAD | TYS | 09:26 | 10:29 |
Landed
|
Track > |
| Jul 17 | IAD | TYS | 09:14 | 10:15 |
Landed
|
Track > |
| Jul 16 | IAD | TYS | 09:08 | 10:08 |
Landed
|
Track > |
| Jul 15 | IAD | TYS | 09:09 | 10:08 |
Landed
|
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| Jul 14 | IAD | TYS | 09:18 | 10:24 |
Landed
|
Track > |
| Jul 13 | IAD | TYS | 09:10 | 10:12 |
Landed
|
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| Jul 12 | IAD | TYS | 11:55 | 10:42 |
En-Route
|
Track > |
| Jul 11 | IAD | TYS | 09:21 | 10:25 |
Landed
|
Track > |
| Jul 10 | IAD | TYS | 10:24 | 11:30 |
Delayed
|
Track > |
| Jul 09 | IAD | TYS | 09:12 | 10:20 |
Landed
|
Track > |
United Airlines Flight UA4257 connects Washington, United States to Knoxville, United States, taking off from Washington Dulles International Airport IAD and landing at Knoxville McGhee Tyson Airport TYS.
How long is the UA4257 flight from Washington to Knoxville?
The average flight time from Washington to Knoxville is 1 hour and 3 minutes. The flight distance is 674 km / 419 miles and the average flight speed is 617 km/h / 383 mph.
How many UA4257 flights are operated per week?
6 flights per week. The flight UA4257 is operated on Monday, Tuesday, Wednesday, Thursday, Friday and Saturday.
What is the On-Time Performance (OTP) of United Airlines Flight UA4257 Washington to Knoxville?
The Airportia On-Time Performance Rating for United Airlines Flight UA4257 is 4.9/5 stars. This metric is calculated using data from the past 10 flights.
When was the latest UA4257 flight?
The latest flight took off on Saturday, July 18th, 2026 with the flight status being Landed on 10:29.
How else can the flight UA4257 be referenced as?
This United Airlines flight can also be referenced as UAL4257, UA 4257, UAL 4257.
How often is flight UA4257 delayed?
On average, 10% of all UA4257 flights are delayed. The average delay is 48 minutes.
Can I get compensation for my delayed or cancelled UA4257 flight or baggage issues?
If your UA4257 flight was cancelled, delayed, or if you experienced baggage issues such as delayed, damaged, or lost bags, you may be entitled to compensation. Compensation amounts and eligibility depend on various regulations, including EC 261/2004, UK261, CA Montreal Convention, US GoodWill, BR-ANAC, SA-GACA and TK-SHY.
See our UA4257 Flight Tracker above for more details.
Flight UA4257 is code-shared by 3 airlines using the flight numbers AC4741, AV2346, CM2237
Other flights departing from Washington IAD: UA683, UA2101, UA6125, JL256
Other flights arriving at Knoxville TYS: AA5647, DL5347, DL4983, AA5950
All flights connecting Washington IAD to Knoxville TYS.
