Flight number record

OO 4759

SkyWest Airlines · Denver to Sioux Falls

Route: DEN → FSD
Departs: 10:05
Flights: 362
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4759, check with SkyWest Airlines. SkyWest Airlines flies under contract for larger airlines, so a ticket for this flight may show a different airline code and number.

OO 4759 earns an A+. Close to nine flights in ten arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 10 points better than the national rate of 77.6%. When something does go wrong the average delay runs about 55 minutes. That rests on 362 flights, with a median arrival 10 minutes early.

Set against the rest of the country, OO 4759's record is 10 points better than the US average of 77.6%. That gap is worth roughly 101 fewer late arrivals for every thousand flights.

On time

87.7%

Arrivals under 15 minutes late, of 359 completed flights

Avg delay

55 min

Across delayed arrivals only, not all flights

Cancelled

0.83%

National rate is 1.81%

1 hour+ late

3.6%

National rate is 8.1%

These figures cover 362 flights between July 2025 and June 2026. The median arrival is 10 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

Schedule

When OO 4759 flies

OO 4759 flies DEN to FSD without a single fixed slot. Its most common scheduled departure was 10:05, used on 70 of 362 flights, with 10:00 (56 flights) and 09:45 (54 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 10:0570 flights19.3%
Departs 10:0056 flights15.5%
Departs 09:4554 flights14.9%

Scale runs 0% to 100%. Rows with fewer than 30 flights show a dash.

Share of scheduled departures at each local time. Times used on fewer than one flight in ten are not listed.

A 10:05 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and OO 4759 runs 4 points better at 87.7%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

OO 4759 next to DEN to FSD

Every carrier on DEN to FSD combined arrived on time 81.6% of the time across 1,831 flights, so OO 4759 is 6 points ahead of it. SkyWest flew 1,307 flights on the same city pair under all its flight numbers, including this one, and those ran 84.7% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 9 points.

OO 4759 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4759thin sample	362	87.7%	55 min	0.83%	A+
All SkyWest Airlines on DEN–FSD	1,307	84.7%	79 min	1.07%	B
All carriers on DEN–FSD	1,831	81.6%	85 min	0.93%	B+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 4759 quarter by quarter

OO 4759 did not run the same all year. Its best quarter was Jan–Mar 2026 at 93.1% on time and its weakest Jul–Sep 2025 at 80.4%, a swing of 13 points on roughly 91 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.

Jul–Sep 202592 flights80.4%
Oct–Dec 202591 flights87.8%
Jan–Mar 202688 flights93.1%
Apr–Jun 202691 flights90.0%

Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.

By weekday, OO 4759 did best on Monday at 92.3% on time and worst on Sunday at 80.0%. Each day rests on about 52 flights, so a gap of 12 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 4759 runs late

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 2,397 reported delay minutes.

Late-arriving aircraft
38%
Carrier
35%
National Airspace System
15%
Extreme weather
12%
Security
0%

Extreme weather accounts for 12% of delay minutes, well above the single-digit share typical across the system. Weather delays are lumpy: they arrive as whole bad days rather than as a steady drag, so the quarterly figures above are the more useful view of the risk. The national share is 6%, so this operation carries roughly 1.9 times the usual weather exposure. The split is drawn from 2,397 delay minutes reported on OO 4759.

Cancellations are rare at 0.83%, below the national 1.81% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 3.6% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

The same number turns up on three other city pairs in the data, including ORD to BNA (1), LAX to SFO (1) and MSP to DEN (1), but none flew often enough under OO 4759 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to FSD only.

One caution: this is a thin sample. 362 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.

What to do with this

Booking OO 4759

For a booking, OO 4759 has one of the better records a US domestic flight can show: 87.7% on time and 0.83% cancelled. That is a base rate, not a promise about any single day.

Where to go next

A flight number here means SkyWest Airlines’s own number as it reports to the DOT. How the figures are computed is on the methodology page.

Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.

Key figures