Flight number record
OO 5771
SkyWest Airlines · Denver to Aspen
- Route
- DEN → ASE
- Departs
- 13:40
- Flights
- 336
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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−. About seven flights in ten arrive on time by the DOT's definition, 5 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 336 flights, with a median arrival 6 minutes early.
The national on-time rate over the same period is 77.3%, so OO 5771 runs 5 points behind the country as a whole. Across a thousand flights that is about 53 extra late arrivals.
Key figures
On time
72.0%
Arrivals under 15 minutes late, of 314 completed flights
Avg delay
81 min
Across delayed arrivals only, not all flights
Cancelled
4.46%
National rate is 1.89%
1 hour+ late
13.1%
National rate is 8.3%
These figures cover 336 flights between September 2025 and August 2026. Beyond the headline rate, 13.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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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 174 of 336 flights, with 13:25 (98 flights) next.
- Departs 13:40174 flights51.8%
- Departs 13:2598 flights29.2%
Scale runs 0% to 100%.
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 78.3%, and OO 5771 runs 6 points worse at 72.0%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
OO 5771 next to DEN to ASE
Every carrier on DEN to ASE combined arrived on time 74.2% of the time across 2,742 flights, so OO 5771 is 2 points behind it. Across its whole network SkyWest Airlines managed 78.7%, which this flight trails by 7 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 5771thin sample | 336 | 72.0% | 81 min | 4.46% | C− |
| All SkyWest Airlines on DEN–ASE | 2,742 | 74.2% | 96 min | 5.11% | C− |
| All carriers on DEN–ASE | 2,742 | 74.2% | 96 min | 5.11% | C− |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | 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 Jul–Sep 2026 at 65.5%, a swing of 13 points on roughly 67 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 202530 flights76.7%
- Oct–Dec 202592 flights78.2%
- Jan–Mar 202690 flights67.9%
- Apr–Jun 202662 flights72.4%
- Jul–Sep 202662 flights65.5%
Scale runs 55% to 85%.
By weekday, OO 5771 did best on Wednesday at 77.3% on time and worst on Sunday at 62.2%. Each day rests on about 48 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 5771 runs when it is late
The 88 late arrivals split 17 under half an hour, 30 between 30 and 60 minutes, and 41 an hour or more.
- 15+ min early69 flights22.0%
- Within 15 min157 flights50.0%
- 15–29 min late17 flights5.4%
- 30–59 min late30 flights9.6%
- 1–2 hours late28 flights8.9%
- 2+ hours late13 flights4.1%
Scale runs 0% to 100%.
Share of 314 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 78 departures that left 15 minutes late or more, only 5 made it up before arrival. 15 flights left on time and still arrived late.
The worst days
Worst days for OO 5771
The latest arrival of the period was on 26 July 2026, 17 hours 25 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On three of the five worst days the largest share was filed as extreme weather.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 26 July 2026 | 17 hours 25 minutes | Late-arriving aircraft |
| 14 June 2026 | 4 hours 10 minutes | Extreme weather |
| 16 July 2026 | 3 hours 24 minutes | Carrier |
| 20 February 2026 | 3 hours 17 minutes | Extreme weather |
| 28 June 2026 | 2 hours 59 minutes | Extreme weather |
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 7,085 reported delay minutes.
- 33%Late-arriving aircraft
- 27%Carrier
- 25%National Airspace System
- 15%Extreme weather
Extreme weather accounts for 15% 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 2.4 times the usual weather exposure. The split is drawn from 7,085 delay minutes reported on OO 5771.
Cancellations run at 4.46%, against 1.89% nationally. That is roughly 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
13.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection 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: 4.46% 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.
Related
Where to go next
- DEN to ASE, every carrier and departure
- ASE to DEN, the return direction
- SkyWest Airlines 5769 on the same route74.0%
- SkyWest Airlines 5779 on the same route69.5%
- SkyWest Airlines 5775 on the same route72.3%
- SkyWest Airlines 5773 on the same route77.4%
- SkyWest Airlines 5782 on the same route78.5%
- SkyWest Airlines 5781 on the same route77.4%
- Denver International (DEN) delay statistics
- SkyWest Airlines on-time record
- Every SkyWest Airlines flight number with a record
- The most and least reliable flight numbers in the US
- Why the first flight of the morning is statistically safest
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, September 2025 to August 2026. Last updated ; recomputed monthly. How this data is collected.