Flight number record
OO 5766
SkyWest Airlines · Aspen to Denver
- Route
- ASE → DEN
- Departs
- 07:30
- Flights
- 337
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 5766, 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 5766 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 13 points better than the national rate of 77.3%. When something does go wrong the average delay runs a little over an hour. That rests on 337 flights, with a median arrival 19 minutes early.
Set against the rest of the country, OO 5766's record is 13 points better than the US average of 77.3%. That gap is worth roughly 128 fewer late arrivals for every thousand flights.
Key figures
On time
90.1%
Arrivals under 15 minutes late, of 324 completed flights
Avg delay
73 min
Across delayed arrivals only, not all flights
Cancelled
3.86%
National rate is 1.89%
1 hour+ late
4.3%
National rate is 8.3%
These figures cover 337 flights between September 2025 and August 2026. The median arrival is 19 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.
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Schedule
When OO 5766 flies
OO 5766 flies ASE to DEN without a single fixed slot. Its most common scheduled departure was 07:30, used on 133 of 337 flights, with 07:00 (107 flights) and 07:35 (43 flights) next.
- Departs 07:30133 flights39.5%
- Departs 07:00107 flights31.8%
- Departs 07:3543 flights12.8%
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 07:30 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and OO 5766 runs level with that at 90.1%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
OO 5766 next to ASE to DEN
Every carrier on ASE to DEN combined arrived on time 76.7% of the time across 2,742 flights, so OO 5766 is 13 points ahead of it. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 11 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 5766thin sample | 337 | 90.1% | 73 min | 3.86% | A− |
| All SkyWest Airlines on ASE–DEN | 2,742 | 76.7% | 106 min | 4.96% | B− |
| All carriers on ASE–DEN | 2,742 | 76.7% | 106 min | 4.96% | B− |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 5766 quarter by quarter
OO 5766 did not run the same all year. Its best quarter was Jul–Sep 2026 at 96.7% on time and its weakest Oct–Dec 2025 at 84.4%, a swing of 12 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 flights86.7%
- Oct–Dec 202592 flights84.4%
- Jan–Mar 202690 flights89.0%
- Apr–Jun 202663 flights95.1%
- Jul–Sep 202662 flights96.7%
Scale runs 75% to 100%.
By weekday, OO 5766 did best on Wednesday at 97.9% on time and worst on Monday at 84.4%. Each day rests on about 48 flights, so a gap of 14 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 5766 runs when it is late
OO 5766 often beats the schedule: 195 of 324 completed flights, 60%, arrived 15 minutes or more early. The 32 late arrivals split 12 under half an hour, 6 between 30 and 60 minutes, and 14 an hour or more.
- 15+ min early195 flights60.2%
- Within 15 min97 flights29.9%
- 15–29 min late12 flights3.7%
- 30–59 min late6 flights1.9%
- 1–2 hours late7 flights2.2%
- 2+ hours late7 flights2.2%
Scale runs 0% to 100%.
Share of 324 completed flights by arrival against schedule.
6 of 25 late departures made up the time and arrived on time, 24% of them. 13 flights left on time and still arrived late.
The worst days
Worst days for OO 5766
The latest arrival of the period was on 13 January 2026, 5 hours 22 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 13 January 2026 | 5 hours 22 minutes | Carrier |
| 1 December 2025 | 3 hours 9 minutes | Carrier |
| 22 September 2025 | 2 hours 57 minutes | Carrier |
| 20 August 2026 | 2 hours 40 minutes | Late-arriving aircraft |
| 5 October 2025 | 2 hours 1 minute | Carrier |
Delay causes
Why OO 5766 runs late
Carrier accounts for 77% of the 2,338 delay minutes carriers reported here, and the remaining four split what is left.
- 77%Carrier
- 12%Late-arriving aircraft
- 7%National Airspace System
- 5%Extreme weather
The largest share of delay minutes, 77%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 1,793 of the 2,338 delay minutes reported here. The split is drawn from 2,338 delay minutes reported on OO 5766.
Cancellations run at 3.86%, against 1.89% nationally. That is about one flight in 25 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
Badly late arrivals are rare here: only 4.3% land an hour or more behind schedule, against 8.3% 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 one other city pair in the data, including SFO to SEA (3), but none flew often enough under OO 5766 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ASE to DEN only.
One caution: this is a thin sample. 337 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 5766
For a booking, the cancellation rate is the figure to plan around on OO 5766: 3.86% of its 337 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
- ASE to DEN, every carrier and departure
- DEN to ASE, the return direction
- SkyWest Airlines 5774 on the same route76.9%
- SkyWest Airlines 5778 on the same route70.1%
- SkyWest Airlines 5776 on the same route62.5%
- SkyWest Airlines 5772 on the same route76.7%
- 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
- What a cancellation rate actually tells you (and what it hides)
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.