Flight number record

OO 4658

SkyWest Airlines · Casper to Denver

Route: CPR → DEN
Departs: 13:25
Flights: 363
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4658, 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 4658 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 11 points better than the national rate of 77.6%. When something does go wrong the average delay runs an hour and a half. That rests on 363 flights, with a median arrival 16 minutes early.

Set against the rest of the country, OO 4658's record is 11 points better than the US average of 77.6%. That gap is worth roughly 106 fewer late arrivals for every thousand flights.

On time

88.2%

Arrivals under 15 minutes late, of 357 completed flights

Avg delay

91 min

Across delayed arrivals only, not all flights

Cancelled

1.10%

National rate is 1.81%

1 hour+ late

4.8%

National rate is 8.1%

These figures cover 363 flights between July 2025 and June 2026. The median arrival is 16 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 4658 flies

OO 4658 flies CPR to DEN without a single fixed slot. Its most common scheduled departure was 13:25, used on 59 of 363 flights, with 13:28 (49 flights) and 13:23 (41 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 13:2559 flights16.3%
Departs 13:2849 flights13.5%
Departs 13:2341 flights11.3%

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 4658 runs 9 points better at 88.2%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

OO 4658 next to CPR to DEN

Every carrier on CPR to DEN combined arrived on time 81.9% of the time across 2,570 flights, so OO 4658 is 6 points ahead of it. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 9 points.

OO 4658 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4658thin sample	363	88.2%	91 min	1.10%	A
All SkyWest Airlines on CPR–DEN	2,570	81.9%	88 min	0.93%	B+
All carriers on CPR–DEN	2,570	81.9%	88 min	0.93%	B+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 4658 quarter by quarter

Quarter by quarter OO 4658 held fairly steady: 89.0% in Jul–Sep 2025, 90.1% in Oct–Dec 2025, 88.5% in Jan–Mar 2026 and 85.2% in Apr–Jun 2026. A spread of 5 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights89.0%
Oct–Dec 202591 flights90.1%
Jan–Mar 202689 flights88.5%
Apr–Jun 202691 flights85.2%

Scale runs 75% to 95%. Rows with fewer than 30 flights show a dash.

By weekday, OO 4658 ranged from 84.9% on Tuesday to 93.8% on Friday. With about 52 flights behind each day, a spread of 9 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why OO 4658 runs late

One category carries most of the weight here. Late-arriving aircraft accounts for 46% of the 3,801 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
46%
Extreme weather
27%
Carrier
18%
National Airspace System
8%

Extreme weather accounts for 27% 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 4.4 times the usual weather exposure. The split is drawn from 3,801 delay minutes reported on OO 4658.

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

Badly late arrivals are rare here: only 4.8% 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 two other city pairs in the data, including CID to ORD (1) and LAX to PHX (1), but none flew often enough under OO 4658 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to CPR to DEN only.

One caution: this is a thin sample. 363 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 4658

For a booking, OO 4658 has one of the better records a US domestic flight can show: 88.2% on time and 1.10% 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