Flight number record

OO 5809

SkyWest Airlines · Casper to Denver

Route: CPR → DEN
Departs: 15:15
Flights: 329
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5809, 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 5809 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 9 points worse than the national rate of 77.6%. The late ones land an hour and a half behind schedule. That rests on 329 flights, with a median arrival 5 minutes early.

The national on-time rate over the same period is 77.6%, so OO 5809 runs 9 points behind the country as a whole. Across a thousand flights that is about 85 extra late arrivals.

On time

69.1%

Arrivals under 15 minutes late, of 324 completed flights

Avg delay

92 min

Across delayed arrivals only, not all flights

Cancelled

1.22%

National rate is 1.81%

1 hour+ late

16.7%

National rate is 8.1%

These figures cover 329 flights between July 2025 and June 2026. Beyond the headline rate, 16.7% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.

Schedule

When OO 5809 flies

OO 5809 flies CPR to DEN without a single fixed slot. Its most common scheduled departure was 15:15, used on 80 of 329 flights, with 15:17 (53 flights) and 15:16 (49 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 15:1580 flights24.3%
Departs 15:1753 flights16.1%
Departs 15:1649 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 15:15 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and OO 5809 runs 3 points worse at 69.1%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

OO 5809 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 5809 is 13 points behind it. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 10 points.

OO 5809 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5809thin sample	329	69.1%	92 min	1.22%	C
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 5809 quarter by quarter

OO 5809 did not run the same all year. Its best quarter was Jan–Mar 2026 at 82.8% on time and its weakest Jul–Sep 2025 at 47.3%, a swing of 36 points on roughly 82 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 flights47.3%
Oct–Dec 202591 flights78.9%
Jan–Mar 202690 flights82.8%
Apr–Jun 202656 flights67.9%

Scale runs 40% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5809 did best on Sunday at 78.7% on time and worst on Saturday at 60.9%. Each day rests on about 47 flights, so a gap of 18 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 5809 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 9,215 reported delay minutes.

National Airspace System
36%
Late-arriving aircraft
30%
Carrier
26%
Extreme weather
9%

36% of delay minutes are charged to the National Airspace System: air traffic volume, runway configuration, ground stops. No carrier can price its way out of that, which is why airport choice moves the number here more than carrier choice does. That is 3,302 minutes out of 9,215, against a national NAS share of 21%. The split is drawn from 9,215 delay minutes reported on OO 5809.

Cancellations sit at 1.22% against a national 1.81%, which is ordinary. Diversions add another 0.30%.

Connections and routes

What a delay on this flight costs

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 16.7% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.

The same number turns up on one other city pair in the data, including GSP to DEN (29), but none flew often enough under OO 5809 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. 329 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 5809

For a booking, OO 5809 is a flight to put a long connection behind. 16.7% of its completed flights arrived an hour or more late, which a short layover will not absorb. If the onward flight is on a separate ticket, the risk sits with you.

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