United Airlines UA4257 Flight Status
According to the latest from Trip.com for United Airlines Flight UA4257 from Washington D.C. to Knoxville (IAD–TYS): Flight UA4257 has landed safely at Mcghee Tyson Airport (TYS) at 10:44 AM local time, arriving approximately 2m behind schedule.
Sun, Jul 5
Mon, Jul 6
Tue, Jul 7
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Arrived
The flight has arrived 22m early
1h 42m
Check-in Counter
AREA 4
Boarding Gate
A1D
Arrival Gate
11
Baggage
3
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Arrived
The flight has arrived 2m late
1h 42m
Check-in Counter
AREA 4
Boarding Gate
A4A
Arrival Gate
11
Baggage
3
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Scheduled
Your flight will depart on time.
1h 42m
Check-in Counter
AREA 4
Boarding Gate
A4B
Arrival Gate
--
Baggage
--
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Information provided by VariFlightVariFlight. For real-time updates, please check airport displays or contact your airline. If this is not your flight, you can browse more options for flights from Washington D.C. to Knoxville to find your schedule.
Track the Previous Flight Status: Scheduled
UA4939
|
Ithaca (ITH) 
Washington D.C. (WAS)
Washington D.C. (WAS)Scheduled: 7:15 AM
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UA4257 Aircraft Details
According to Trip.com real-time data, the UA4257 flight flying from Washington D.C. to Knoxville on 7/6/2026 is operated by the aircraft model Embraer RJ 135/140/145. This aircraft has been in service for 22y, 10m. The aircraft is equipped with 50 seats.
Embraer RJ 135/140/145
Punctuality (Departure)
63%
Punctuality (Arrival)
63%
Late on average
52 minutes
Age
22y, 10m
Seats
50
Flight Distance
--
Economy
Premium Economy
In-Flight Services
Snacks
In-flight entertainment is unavailable
Wi-Fi is unavailable
No power outlets are available
Seat Information
79 cm
Legroom
--
Seat width
105°
Reclining Angle
1-2
Seat layout example
In-Flight Services
None
In-flight entertainment is unavailable
Wi-Fi is unavailable
No power outlets are available
Seat Information
97 cm
More legroom than on 14% of flights
--
Seat width
105°
Reclining Angle
--
Seat layout example
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Flight History for UA4257
Trip.com historical records show that the last UA4257 flight departed on Sun, Jul 5 from IAD at approximately 9:17 AM. This flight is expected to arrrive in TYS at 10:20 AM.
| Date | Airport | Aircraft Model | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Departure | Arrival | |||||
| Thu, Jul 2 | Washington D.C. (IAD) | Knoxville (TYS) | E45X | 12:09 PM | 1:18 PM | Arrived |
| Fri, Jul 3 | Washington D.C. (IAD) | Knoxville (TYS) | E45X | 9:04 AM | 10:06 AM | Arrived |
| Sat, Jul 4 | Washington D.C. (IAD) | Knoxville (TYS) | E45X | 9:08 AM | 10:16 AM | Arrived |
| Sun, Jul 5 | Washington D.C. (IAD) | Knoxville (TYS) | E45X | 9:17 AM | 10:20 AM | Arrived |
| Mon, Jul 6 | Washington D.C. (IAD) | Knoxville (TYS) | E45X | 9:42 AM | 10:44 AM | Arrived |
| Tue, Jul 7 | Washington D.C. (IAD) | Knoxville (TYS) | E45X | 9:00 AM | 10:42 AM | Scheduled |
| Wed, Jul 8 | Washington D.C. (IAD) | Knoxville (TYS) | E45X | 9:00 AM | 10:42 AM | Scheduled |
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UA4257 On-Time Performance
Based on the average performance of this flight over the past 30 trips, the on-time departure rate of UA4257 is 63% (Late on average 1 hour28 minutes), and the on-time arrival rate is 63% (Late on average 52 minutes).
On-Time Departures
Punctuality
63%
Late on average 1 hour28 minutes
Early
0%
On time
63%
30 mins late
0%
60 mins late
0%
90 mins late
37%
Canceled
0%
On-Time Arrivals
Punctuality
63%
Late on average 52 minutes
Early
63%
On time
0%
30 mins late
0%
60 mins late
0%
90 mins late
37%
Canceled
0%
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