| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Aug 30 | IAD | TYS | 12:01 | 10:37 |
Unknown
|
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| Aug 21 | IAD | TYS | 09:00 | 10:37 |
Scheduled
|
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| Aug 13 | IAD | TYS | 09:17 | 10:37 |
En-Route
|
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| Aug 01 | IAD | TYS | 09:00 | 10:42 |
Delayed
|
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| Jul 30 | IAD | TYS | 12:10 | 10:42 |
En-Route
|
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| Jul 29 | IAD | TYS | 12:00 | 10:42 |
Unknown
|
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| Jul 28 | IAD | TYS | 09:38 | 10:56 |
Landed
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| Jul 27 | IAD | TYS | 09:13 | 10:26 |
Landed
|
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| Jul 26 | IAD | TYS | 09:09 | 10:15 |
Landed
|
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| Jul 25 | IAD | TYS | 09:47 | 10:50 |
Landed
|
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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 10 minutes. The flight distance is 674 km / 419 miles and the average flight speed is 477 km/h / 296 mph.
How many UA4257 flights are operated per week?
1 flight per week. The flight UA4257 is operated on Sunday.
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 5/5 stars. This metric is calculated using data from the past 10 flights.
When was the latest UA4257 flight?
The latest flight took off on Sunday, August 30th, 2026 with the flight status being Unknown on 10:37.
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, 20% of all UA4257 flights are delayed. The average delay is 11 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.
Other flights departing from Washington IAD: UA683, UA1323, C54333, C54257
Other flights arriving at Knoxville TYS: OH5109, PT5855, PT6094, C54257
All flights connecting Washington IAD to Knoxville TYS.
