Flight number record

OO 4797

SkyWest Airlines · Denver to Casper

Route: DEN → CPR
Departs: 13:25
Flights: 365
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4797, 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 4797 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 7 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 365 flights, with a median arrival 8 minutes early.

Set against the rest of the country, OO 4797's record is 7 points better than the US average of 77.6%. That gap is worth roughly 65 fewer late arrivals for every thousand flights.

On time

84.1%

Arrivals under 15 minutes late, of 359 completed flights

Avg delay

67 min

Across delayed arrivals only, not all flights

Cancelled

1.10%

National rate is 1.81%

1 hour+ late

5.6%

National rate is 8.1%

These figures cover 365 flights between July 2025 and June 2026. The median arrival is 8 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 4797 flies

OO 4797 flies DEN to CPR without a single fixed slot. Its most common scheduled departure was 13:25, used on 253 of 365 flights, with 13:30 (85 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 13:25253 flights69.3%
Departs 13:3085 flights23.3%

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 13:25 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and OO 4797 runs 5 points better at 84.1%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

OO 4797 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 4797 is 7 points ahead of it. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 5 points.

OO 4797 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4797	365	84.1%	67 min	1.10%	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 4797 quarter by quarter

Quarter by quarter OO 4797 held fairly steady: 86.8% in Jul–Sep 2025, 89.1% in Oct–Dec 2025, 80.5% in Jan–Mar 2026 and 79.8% in Apr–Jun 2026. A spread of 9 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights86.8%
Oct–Dec 202592 flights89.1%
Jan–Mar 202690 flights80.5%
Apr–Jun 202691 flights79.8%

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

By weekday, OO 4797 did best on Monday at 92.3% on time and worst on Friday at 75.5%. Each day rests on about 52 flights, so a gap of 17 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 4797 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 3,811 reported delay minutes.

Carrier
42%
Late-arriving aircraft
33%
National Airspace System
17%
Extreme weather
8%
Security
1%

The largest share of delay minutes, 42%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 1,589 of the 3,811 delay minutes reported here. The split is drawn from 3,811 delay minutes reported on OO 4797.

Cancellations sit at 1.10% against a national 1.81%, which is ordinary. Diversions add another 0.55%.

Connections and routes

What a delay on this flight costs

5.6% 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.

Every one of the 365 flights under OO 4797 in the data flew DEN to CPR. The number was not reused on any other city pair, which makes this a clean record of one route.

One caution: this is a thin sample. 365 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 4797

For a booking, read OO 4797 as 84.1% on time with 1.10% cancelled over 365 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