Flight number record

OO 5291

SkyWest Airlines · Colorado Springs to Denver

Route: COS → DEN
Departs: 06:00
Flights: 319
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5291, 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 5291 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 10 points better than the national rate of 77.6%. When something does go wrong the average delay runs about an hour. That rests on 319 flights, with a median arrival 14 minutes early.

Set against the rest of the country, OO 5291's record is 10 points better than the US average of 77.6%. That gap is worth roughly 101 fewer late arrivals for every thousand flights.

On time

87.7%

Arrivals under 15 minutes late, of 317 completed flights

Avg delay

67 min

Across delayed arrivals only, not all flights

Cancelled

0.63%

National rate is 1.81%

1 hour+ late

3.8%

National rate is 8.1%

These figures cover 319 flights between July 2025 and June 2026. The median arrival is 14 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 5291 flies

OO 5291 flies COS to DEN without a single fixed slot. Its most common scheduled departure was 06:00, used on 243 of 319 flights, with 05:50 (36 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 06:00243 flights76.2%
Departs 05:5036 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 06:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and OO 5291 runs level with that at 87.7%. 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 5291 next to COS to DEN

Every carrier on COS to DEN combined arrived on time 78.8% of the time across 5,038 flights, so OO 5291 is 9 points ahead of it. SkyWest flew 3,282 flights on the same city pair under all its flight numbers, including this one, and those ran 81.3% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 9 points.

OO 5291 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5291thin sample	319	87.7%	67 min	0.63%	A+
All SkyWest Airlines on COS–DEN	3,282	81.3%	75 min	1.68%	B
All carriers on COS–DEN	5,038	78.8%	71 min	1.33%	B
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 5291 quarter by quarter

OO 5291 did not run the same all year. Its best quarter was Jan–Mar 2026 at 90.8% on time and its weakest Jul–Sep 2025 at 80.4%, a swing of 10 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 202592 flights80.4%
Oct–Dec 202554 flights90.7%
Jan–Mar 202689 flights90.8%
Apr–Jun 202684 flights90.5%

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

By weekday, OO 5291 ranged from 83.0% on Thursday to 93.3% on Friday. With about 46 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.

Delay causes

Why OO 5291 runs late

One category carries most of the weight here. Carrier accounts for 92% of the 2,603 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.

Carrier
92%
Extreme weather
4%
National Airspace System
4%

The largest share of delay minutes, 92%, 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 2,392 of the 2,603 delay minutes reported here. The split is drawn from 2,603 delay minutes reported on OO 5291.

Cancellations are rare at 0.63%, below the national 1.81% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

Connections and routes

What a delay on this flight costs

Badly late arrivals are rare here: only 3.8% 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 three other city pairs in the data, including DEN to MSP (25), IAH to OKC (5) and ORD to ATW (1), but none flew often enough under OO 5291 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to COS to DEN only.

One caution: this is a thin sample. 319 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 5291

For a booking, OO 5291 has one of the better records a US domestic flight can show: 87.7% on time and 0.63% 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