Flight number record

OO 5771

SkyWest Airlines · Denver to Aspen

Route: DEN → ASE
Departs: 13:40
Flights: 336
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5771, 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 5771 sits in the middle of the pack with a C−. Close to three flights in four arrive on time by the DOT's definition, 4 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 336 flights, with a median arrival 7 minutes early.

The national on-time rate over the same period is 77.6%, so OO 5771 runs 4 points behind the country as a whole. Across a thousand flights that is about 44 extra late arrivals.

On time

73.2%

Arrivals under 15 minutes late, of 310 completed flights

Avg delay

70 min

Across delayed arrivals only, not all flights

Cancelled

5.36%

National rate is 1.81%

1 hour+ late

12.3%

National rate is 8.1%

These figures cover 336 flights between July 2025 and June 2026. Beyond the headline rate, 12.3% 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 5771 flies

OO 5771 flies DEN to ASE without a single fixed slot. Its most common scheduled departure was 13:40, used on 182 of 336 flights, with 13:25 (77 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 13:40182 flights54.2%
Departs 13:2577 flights22.9%

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 13:40 departure sits in the 11am–2pm window. Across every US flight scheduled in that window the on-time rate is 78.8%, and OO 5771 runs 6 points worse at 73.2%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

OO 5771 next to DEN to ASE

Every carrier on DEN to ASE combined arrived on time 74.8% of the time across 2,715 flights, so OO 5771 is 2 points behind it. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 6 points.

OO 5771 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5771thin sample	336	73.2%	70 min	5.36%	C−
All SkyWest Airlines on DEN–ASE	2,715	74.8%	96 min	5.23%	C−
All carriers on DEN–ASE	2,715	74.8%	96 min	5.23%	C−
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 5771 quarter by quarter

OO 5771 did not run the same all year. Its best quarter was Oct–Dec 2025 at 78.2% on time and its weakest Jan–Mar 2026 at 67.9%, a swing of 10 points on roughly 84 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 flights73.8%
Oct–Dec 202592 flights78.2%
Jan–Mar 202690 flights67.9%
Apr–Jun 202662 flights72.4%

Scale runs 60% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5771 did best on Wednesday at 83.7% on time and worst on Sunday at 65.9%. Each day rests on about 48 flights, so a gap of 18 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 5771 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 5,783 reported delay minutes.

National Airspace System
30%
Carrier
28%
Late-arriving aircraft
23%
Extreme weather
19%

Extreme weather accounts for 19% 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 3.0 times the usual weather exposure. The split is drawn from 5,783 delay minutes reported on OO 5771.

Cancellations run at 5.36%, against 1.81% nationally. That is about one flight in twenty cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.

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. 12.3% 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 two other city pairs in the data, including CID to ORD (21) and DEN to BIL (7), but none flew often enough under OO 5771 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to ASE only.

One caution: this is a thin sample. 336 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 5771

For a booking, the cancellation rate is the figure to plan around on OO 5771: 5.36% of its 336 scheduled flights did not operate. A late arrival costs a little over an hour, but a cancellation costs the day, so leave a later option open.

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