United Airlines
UA645 Flight Status
According to Trip.com real-time data, the UA645 flight operated by United Airlines on Oct 2, 2026 is scheduled to fly from Denver (DEN) to Sioux Falls (FSD). The flight is expected to depart at 5:40 PM (local time in Denver, UTC-6) and land at 7:50 PM (local time in Sioux Falls, UTC-5) .
Thu, Oct 1
Fri, Oct 2
Sat, Oct 3
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Arrived
The flight has arrived 11m early
1h 40m
Check-in Counter
7,8
Boarding Gate
A18
Arrival Gate
7
Baggage
1
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Scheduled
Your flight will depart on time.
1h 40m
Check-in Counter
7,8
Boarding Gate
B43
Arrival Gate
7
Baggage
1
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Scheduled
Your flight will depart on time.
1h 40m
Check-in Counter
7,8
Boarding Gate
--
Arrival Gate
--
Baggage
--
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Information provided by VariFlight
For real-time updates, please check airport displays or contact your airline.
You can also explore more flights from Denver to Sioux Falls or track other flights with our flight status tracker.
Track the Previous Flight Status: Scheduled
UA709
|
Washington D.C. (WAS)
Denver (DEN)
Denver (DEN)
Scheduled: 4:28 PM
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UA645 Aircraft Details
According to Trip.com real-time data, the UA645 flight flying from Denver to Sioux Falls on 10/2/2026 is operated by the aircraft model Boeing 737-900. This aircraft has been in service for 3y, 7m. The aircraft is equipped with 179 seats.
Boeing 737-900
Punctuality (Departure)
80
%
Punctuality (Arrival)
87
%
Early on average
2 minutes
Age
3y, 7m
Seats
179
Flight Distance
--
Economy
First
Premium Economy
In-Flight Services
Snacks
On-demand entertainment
Wi-Fi (additional charge)
Power outlet
Seat Information
--
Legroom
--
Seat width
100°
Reclining Angle
3-3
Seat layout example
In-Flight Services
Snacks
On-demand entertainment
Wi-Fi (additional charge)
Power outlet
Seat Information
94 cm
Legroom
51 cm
Seat width
120°
Reclining Angle
2-2
Seat layout example
In-Flight Services
Snacks
Entertainment available, please bring your own device
Wi-Fi is available
Power outlet
Seat Information
--
Legroom
--
Seat width
105°
Reclining Angle
--
Seat layout example
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Flight History for UA645
Trip.com historical records show that the last UA645 flight departed on Thu, Oct 1 from DEN at approximately 6:04 PM. This flight is expected to arrrive in FSD at 8:09 PM.
| Date | Airport | Aircraft Model | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Departure | Arrival | |||||
| Sun, Sep 27 | Denver (DEN) | Sioux Falls (FSD) | 739 | 6:03 PM | 8:09 PM | Arrived |
| Mon, Sep 28 | Denver (DEN) | Sioux Falls (FSD) | 739 | 5:58 PM | 8:10 PM | Arrived |
| Tue, Sep 29 | Denver (DEN) | Sioux Falls (FSD) | 739 | 5:55 PM | 8:01 PM | Arrived |
| Wed, Sep 30 | Denver (DEN) | Sioux Falls (FSD) | 739 | 5:53 PM | 8:04 PM | Arrived |
| Thu, Oct 1 | Denver (DEN) | Sioux Falls (FSD) | 739 | 6:04 PM | 8:09 PM | Arrived |
| Fri, Oct 2 | Denver (DEN) | Sioux Falls (FSD) | B39M | 5:40 PM | 7:50 PM | Scheduled |
| Sat, Oct 3 | Denver (DEN) | Sioux Falls (FSD) | 739 | 6:00 PM | 8:40 PM | Scheduled |
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UA645 On-Time Performance
Based on the average performance of this flight over the past 30 trips, the on-time departure rate of UA645 is 80% (Late on average 28 minutes), and the on-time arrival rate is 87% (Early on average 2 minutes).
On-Time Departures
Punctuality
80
%
Late on average
28 minutes
Early
0
%
On time
80
%
30 mins late
7
%
60 mins late
7
%
90 mins late
7
%
Canceled
0
%
On-Time Arrivals
Punctuality
87
%
Early on average
2 minutes
Early
83
%
On time
3
%
30 mins late
7
%
60 mins late
3
%
90 mins late
3
%
Canceled
0
%
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Frequently Asked Questions
-
What is the current status of flight ua645?
Flight ua645 has not departed yet and is currently on schedule. Scheduled departure 5:40 PM, arrival 8:20 PM (updated Oct 2, 2026). -
Is flight ua645 on time today?
Flight ua645 has not departed yet and is currently on schedule. Scheduled departure is 5:40 PM, with arrival at 8:20 PM. Recheck gate and timing before you head to the airport. -
Has flight ua645 departed yet? What is the departure time?
Flight ua645 is scheduled to depart at 5:40 PM. The latest actual or estimated departure time is 5:40 PM, and the current status is Scheduled (updated Oct 2, 2026). -
When is flight ua645 scheduled to arrive?
Flight ua645 is scheduled to arrive at 8:20 PM. The latest estimated or actual arrival time is 7:50 PM. Status is Scheduled as of Oct 2, 2026. -
What route does flight ua645 fly?
Flight ua645 is operated by United Airlines from Denver (DEN) to Sioux Falls (FSD). Typical flight time is about 1 hour40 minutes; operating days may include Friday. -
How can I check real-time status for flight ua645?
Track flight ua645 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 ua645 is delayed or canceled, what should I do?
If ua645 is delayed or canceled, first confirm the latest status here (Scheduled, updated Oct 2, 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 ua645 departed from Denver?
Flight ua645 has not departed from Denver (DEN) yet and is currently on schedule for 5:40 PM. -
What is the seat configuration for flight ua645?
Flight ua645 usually flies a Boeing 737-900 with seat layout 3-3. 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: Sioux Falls Weather & Current Time
Partly clear
|
5°C - 20°C
Weather forecast for your arrival day
1 hour time difference
Time on arrival: Denver 18:50
|
Sioux Falls 19:50
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