UA645United Airlines · DEN → FSD
live · 6m ago
Route confirmed United Airlines

UA645 DenverDEN · 17:25 Sioux FallsFSD · 20:04

UA645 by United Airlines flies from Denver (DEN) to Sioux Falls (FSD) for the Wed, Nov 4 departure.

Right nowEn route to Sioux Falls · off blocks 17:23 · 2 min early
19:59

estimated arrival at FSD · local time · ~45 min from now

En routeUA645 · position estimated
DENDenverFSDSioux Falls
Estimated from the boardsarr 19:59

Board estimate · gate and arrival times. Off blocks 17:23 · typical taxi-out at DEN ≈ 7.2 min.

⚖ UA645 typically leaves +0 and lands −22. The air wins minutes back.
Typical gate push+0 minmedian posted departure
Typical arrival−22 minmedian over 10 operations
Wins back in air~22 minmedian gate push vs arrival · how planes make up time → Cancellation0 in 11tracked operations · cancellation odds calculator →

Where the minutes go

last 7 operations · gate push → arrival
0+30+60+90 min
11-04
−2 gate · −5 arrival
11-03
−1 gate · −23 arrival
11-02
+1 gate · −15 arrival
11-01
+0 gate · −23 arrival
10-31
−5 gate · −24 arrival
10-30
+11 gate · −9 arrival
10-29
+2 gate · −18 arrival

The bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.

The last 30 days

arrival outcome per operation

median arrival −22 min · 0 cancelled · 11 operations tracked

The route today

live boards
DENDenverOn-time likelyDEN delay board →
FSDSioux FallsHigh riskFSD delay board →
DEN→FSDevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Weather-conditioned outlook for this flight right now

Measured, 90-day sample
49%Chance of 15+ min delay
1.8%Chance of cancellation
+17 minTypical airport delay in this weather

Driven mainly by FSD (Sioux Falls), currently flying MVFR (marginal visual). These figures come from both airports' records under conditions like today's, over the last 90 days.

Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →

Tomorrow at Denver

Forecast

Thu 5 Nov, local date

High14°Clikely 12°C to 16°C
Low1°Clikely 0°C to 3°C

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

Tomorrow at Sioux Falls

Forecast

Thu 5 Nov, local date

High7°Clikely 6°C to 9°C
Low2°Clikely −1°C to 3°C

Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.

When it flies

scheduled departures
061422
M
T
W
T
F
S
S

Each mark is a scheduled departure at its origin-local time. Today is highlighted.

Other Denver to Sioux Falls flights today

same route · United Airlines
UA5397departs 07:40
UA4759departs 09:50
UA4793departs 13:40
UA5700departs 21:04

If UA645 is cancelled, these are the other United Airlines nonstop flights from Denver to Sioux Falls on the same day, with scheduled departure times in DEN local time. Most flights that show a delay still operate. Rebooking usually helps only when that delay is very large. Every airline on this route →

How UA645 actually runs

Pro Flight Search has tracked every published board update for UA645 across the DEN and FSD boards: schedule changes, gate pushes and actual clocks. Usually lands ~19 min early. Based on 9 confirmed landings · 9/9 within 15 min of schedule. Pushes back late but makes up time in the air.

The verdict above is that record speaking, so it reflects how UA645 operates rather than what the timetable promises. Numbers refresh as new flights operate.

Technical record

How this operation is measured

board clocksaircraft

Board log

scheduled → actual, per operation
11-04DEN 17:25 17:23 (−2)FSD 20:04 19:59 (−5)
11-03DEN 17:25 17:24 (−1)FSD 20:04 19:41 (−23)
11-02DEN 17:25 17:26 (+1)FSD 20:04 19:49 (−15)
11-01DEN 17:25 (+0)FSD 20:04 19:41 (−23)
10-31DEN 17:25 17:20 (−5)FSD 20:04 19:40 (−24)
10-30DEN 17:25 17:36 (+11)FSD 20:04 19:55 (−9)
10-29DEN 17:25 17:27 (+2)FSD 20:04 19:46 (−18)
10-28DEN 17:25 17:21 (−4)FSD 20:04 19:34 (−30)
10-27DEN 17:25 17:27 (+2)FSD 20:04 19:43 (−21)
10-26DEN 17:25 17:24 (−1)FSD 20:04 19:39 (−25)
10-25DEN 17:25 17:29 (+4)FSD

Aircraft

Recent tails: N67845, N36472, N47450, N47470.

Board clocks recorded as DEN and FSD published them.

Planning around UA645? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search: UA645 Denver to Sioux Falls on-time performance, measured from the DEN and FSD airport boards.

Canonical URL
https://proflightsearch.com/flight/UA645
How we measure this →