United Airlines UA4257 Flight Status
According to Trip.com real-time data, the UA4257 flight operated by United Airlines on Oct 30, 2026 is scheduled to fly from Washington D.C. (IAD) to Knoxville (TYS). The flight is expected to depart at 9:40 AM and land at 10:45 AM .
Thu, Oct 29
Fri, Oct 30
Sat, Oct 31
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Arrived
The flight has arrived 34m early
1h 50m
Check-in Counter
AREA 4
Boarding Gate
A4A
Arrival Gate
13
Baggage
3
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United Airlines From MYR 977
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Scheduled
Your flight will depart on time.
1h 50m
Check-in Counter
AREA 4
Boarding Gate
A2F
Arrival Gate
13
Baggage
3
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Need a flight from Washington D.C. to Knoxville?
United Airlines From MYR 977
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Scheduled
Your flight will depart on time.
1h 50m
Check-in Counter
AREA 4
Boarding Gate
A3A
Arrival Gate
--
Baggage
--
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Need a flight from Washington D.C. to Knoxville?
United Airlines From MYR 977
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UA4257
Track the Previous Flight Status: Scheduled
UA4342
|
Charlottesville (CHO)
Washington D.C. (WAS)
Washington D.C. (WAS)
Scheduled: 7:11 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 10/30/2026 is operated by the aircraft model Embraer RJ 135/140/145. This aircraft has been in service for 23y, 7m. The aircraft is equipped with 50 seats.
Embraer RJ 135/140/145
Punctuality (Departure)
90
%
Punctuality (Arrival)
93
%
Early on average
13 minutes
Age
23y, 7m
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
100°
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
100°
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 Thu, Oct 29 from IAD at approximately 9:49 AM. This flight is expected to arrrive in TYS at 10:56 AM.
| Date | Airport | Aircraft Model | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Departure | Arrival | |||||
| Sat, Oct 24 | Washington D.C. (IAD) | Knoxville (TYS) | E45X | 9:06 AM | 10:05 AM | Arrived |
| Mon, Oct 26 | Washington D.C. (IAD) | Knoxville (TYS) | E45X | 9:52 AM | 10:59 AM | Arrived |
| Tue, Oct 27 | Washington D.C. (IAD) | Knoxville (TYS) | E45X | 9:45 AM | 10:54 AM | Arrived |
| Wed, Oct 28 | Washington D.C. (IAD) | Knoxville (TYS) | E45X | 9:52 AM | 11:02 AM | Arrived |
| Thu, Oct 29 | Washington D.C. (IAD) | Knoxville (TYS) | E45X | 9:49 AM | 10:56 AM | Arrived |
| Fri, Oct 30 | Washington D.C. (IAD) | Knoxville (TYS) | E45X | 9:40 AM | 10:45 AM | Scheduled |
| Sat, Oct 31 | Washington D.C. (IAD) | Knoxville (TYS) | E45X | 9:40 AM | 11:30 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 90% (Late on average 18 minutes), and the on-time arrival rate is 93% (Early on average 13 minutes).
On-Time Departures
Punctuality
90
%
Late on average
18 minutes
Early
3
%
On time
87
%
30 mins late
3
%
60 mins late
3
%
90 mins late
3
%
Canceled
0
%
On-Time Arrivals
Punctuality
93
%
Early on average
13 minutes
Early
90
%
On time
3
%
30 mins late
3
%
60 mins late
0
%
90 mins late
3
%
Canceled
0
%
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Frequently Asked Questions
What is the current status of flight ua4257?
Flight ua4257 has not departed yet and is currently on schedule. Scheduled departure 9:40 AM, arrival 11:30 AM (updated Oct 30, 2026).Is flight ua4257 on time today?
Flight ua4257 has not departed yet and is currently on schedule. Scheduled departure is 9:40 AM, with arrival at 11:30 AM. Recheck gate and timing before you head to the airport.Has flight ua4257 departed yet? What is the departure time?
Flight ua4257 is scheduled to depart at 9:40 AM. The latest actual or estimated departure time is 9:40 AM, and the current status is Scheduled (updated Oct 30, 2026).When is flight ua4257 scheduled to arrive?
Flight ua4257 is scheduled to arrive at 11:30 AM. The latest estimated or actual arrival time is 10:45 AM. Status is Scheduled as of Oct 30, 2026.What route does flight ua4257 fly?
Flight ua4257 is operated by United Airlines from Washington D.C. (IAD) to Knoxville (TYS). Typical flight time is about 1 hour50 minutes; operating days may include Friday.How can I check real-time status for flight ua4257?
Track flight ua4257 on this Trip.com status page for live departure, arrival, gate and baggage updates. For push alerts on the go, open the same flight in the Trip.com App and turn on flight notifications.If flight ua4257 is delayed or canceled, what should I do?
If ua4257 is delayed or canceled, first confirm the latest status here (Scheduled, updated Oct 30, 2026). Contact United Airlines or your booking channel for rebooking or refund options, and check Trip.com Manage Booking if you booked on Trip.com.Has flight ua4257 departed from Washington D.C.?
Flight ua4257 has not departed from Washington D.C. (IAD) yet and is currently on schedule for 9:40 AM.What is the seat configuration for flight ua4257?
Flight ua4257 usually flies a Embraer RJ 135/140/145 with seat layout 1-2. Layouts can differ by aircraft subtype and cabin product—confirm your seat map in Manage Booking after you purchase.
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Arrival Info: Knoxville Weather & Current Time
Mostly cloudy
|
8°C - 24°C
Weather forecast for your arrival day
0 hour time difference
Time on arrival: Washington D.C. 10:45
|
Knoxville 10:45
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