Flight number record

OO 5743

SkyWest Airlines · Denver to Casper

Route: DEN → CPR
Departs: 09:35
Flights: 356
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5743, 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 5743 earns a B. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 6 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 356 flights, with a median arrival 9 minutes early.

Set against the rest of the country, OO 5743's record is 6 points better than the US average of 77.6%. That gap is worth roughly 64 fewer late arrivals for every thousand flights.

On time

84.0%

Arrivals under 15 minutes late, of 349 completed flights

Avg delay

68 min

Across delayed arrivals only, not all flights

Cancelled

1.40%

National rate is 1.81%

1 hour+ late

5.7%

National rate is 8.1%

These figures cover 356 flights between July 2025 and June 2026. The median arrival is 9 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 5743 flies

OO 5743 flies DEN to CPR without a single fixed slot. Its most common scheduled departure was 09:35, used on 256 of 356 flights, with 09:40 (74 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 09:35256 flights71.9%
Departs 09:4074 flights20.8%

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 09:35 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and OO 5743 runs level with that at 84.0%. 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 5743 next to DEN to CPR

Every carrier on DEN to CPR combined arrived on time 77.4% of the time across 2,570 flights, so OO 5743 is 7 points ahead of it. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 5 points.

OO 5743 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5743thin sample	356	84.0%	68 min	1.40%	B
All SkyWest Airlines on DEN–CPR	2,570	77.4%	79 min	1.01%	B
All carriers on DEN–CPR	2,570	77.4%	79 min	1.01%	B
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 5743 quarter by quarter

OO 5743 did not run the same all year. Its best quarter was Jan–Mar 2026 at 88.2% on time and its weakest Apr–Jun 2026 at 77.4%, a swing of 11 points on roughly 89 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 202591 flights87.9%
Oct–Dec 202591 flights82.0%
Jan–Mar 202689 flights88.2%
Apr–Jun 202685 flights77.4%

Scale runs 70% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5743 did best on Tuesday at 94.2% on time and worst on Friday at 77.1%. Each day rests on about 51 flights, so a gap of 17 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 5743 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 53% of the 3,785 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Late-arriving aircraft
53%
Carrier
36%
National Airspace System
11%

53% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 3,785 reported delay minutes here, that single category outweighs weather by 53 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 3,785 delay minutes reported on OO 5743.

Cancellations sit at 1.40% against a national 1.81%, which is ordinary. Diversions add another 0.56%.

Connections and routes

What a delay on this flight costs

5.7% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last about an hour, which a normal layover absorbs.

The same number turns up on two other city pairs in the data, including ORD to ROC (3) and RIW to CPR (1), but none flew often enough under OO 5743 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to CPR only.

One caution: this is a thin sample. 356 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 5743

For a booking, read OO 5743 as 84.0% on time with 1.40% cancelled over 356 flights. Those are rates from the past twelve months, not a forecast for any particular 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