Flight number record

OO 4650

SkyWest Airlines · Denver to Colorado Springs

Route: DEN → COS
Departs: 21:05
Flights: 321
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4650, 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 4650 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 6 points worse than the national rate of 77.6%. The late ones land an hour and a half behind schedule. That rests on 321 flights, with a median arrival 4 minutes early.

The national on-time rate over the same period is 77.6%, so OO 4650 runs 6 points behind the country as a whole. Across a thousand flights that is about 59 extra late arrivals.

On time

71.7%

Arrivals under 15 minutes late, of 315 completed flights

Avg delay

84 min

Across delayed arrivals only, not all flights

Cancelled

1.56%

National rate is 1.81%

1 hour+ late

13.7%

National rate is 8.1%

These figures cover 321 flights between July 2025 and June 2026. Beyond the headline rate, 13.7% 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 4650 flies

OO 4650 flies DEN to COS without a single fixed slot. Its most common scheduled departure was 21:05, used on 116 of 321 flights, with 21:00 (53 flights) and 19:45 (43 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 21:05116 flights36.1%
Departs 21:0053 flights16.5%
Departs 19:4543 flights13.4%

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 21:05 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and OO 4650 runs level with that at 71.7%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

OO 4650 next to DEN to COS

Every carrier on DEN to COS combined arrived on time 75.8% of the time across 5,039 flights, so OO 4650 is 4 points behind it. SkyWest flew 3,283 flights on the same city pair under all its flight numbers, including this one, and those ran 76.5% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 7 points.

OO 4650 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4650thin sample	321	71.7%	84 min	1.56%	C
All SkyWest Airlines on DEN–COS	3,283	76.5%	72 min	1.89%	B
All carriers on DEN–COS	5,039	75.8%	67 min	1.45%	B
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 4650 quarter by quarter

OO 4650 did not run the same all year. Its best quarter was Jan–Mar 2026 at 84.1% on time and its weakest Jul–Sep 2025 at 46.4%, a swing of 38 points on roughly 80 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 202586 flights46.4%
Oct–Dec 202554 flights81.1%
Jan–Mar 202690 flights84.1%
Apr–Jun 202691 flights77.8%

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

By weekday, OO 4650 did best on Wednesday at 85.1% on time and worst on Friday at 62.8%. Each day rests on about 46 flights, so a gap of 22 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 4650 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 7,467 reported delay minutes.

National Airspace System
34%
Late-arriving aircraft
32%
Carrier
27%
Extreme weather
6%

34% 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 2,570 minutes out of 7,467, against a national NAS share of 21%. The split is drawn from 7,467 delay minutes reported on OO 4650.

Cancellations sit at 1.56% against a national 1.81%, which is ordinary. Diversions add another 0.31%.

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. 13.7% 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 three other city pairs in the data, including FAT to LAX (37), BIS to DEN (5) and DEN to SLC (2), but none flew often enough under OO 4650 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to COS only.

One caution: this is a thin sample. 321 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 4650

For a booking, OO 4650 is a flight to put a long connection behind. 13.7% 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