Flight number record
OO 5778
SkyWest Airlines · Aspen to Denver
- Route
- ASE → DEN
- Departs
- 18:15
- Flights
- 334
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 5778, 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 5778 sits in the middle of the pack with a C−. About seven flights in ten arrive on time by the DOT's definition, 7 points worse than the national rate of 77.3%. The late ones land an hour and a half behind schedule. That rests on 334 flights, with a median arrival 1 minute early.
The national on-time rate over the same period is 77.3%, so OO 5778 runs 7 points behind the country as a whole. Across a thousand flights that is about 72 extra late arrivals.
Key figures
On time
70.1%
Arrivals under 15 minutes late, of 311 completed flights
Avg delay
86 min
Across delayed arrivals only, not all flights
Cancelled
6.89%
National rate is 1.89%
1 hour+ late
15.4%
National rate is 8.3%
These figures cover 334 flights between September 2025 and August 2026. Beyond the headline rate, 15.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When OO 5778 flies
OO 5778 flies ASE to DEN without a single fixed slot. Its most common scheduled departure was 18:15, used on 55 of 334 flights, with 17:12 (52 flights) and 17:10 (51 flights) next.
- Departs 18:1555 flights16.5%
- Departs 17:1252 flights15.6%
- Departs 17:1051 flights15.3%
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 18:15 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.0%, and OO 5778 runs 2 points better at 70.1%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
OO 5778 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 5778 is 7 points behind it. Across its whole network SkyWest Airlines managed 78.7%, which this flight trails by 9 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 5778thin sample | 334 | 70.1% | 86 min | 6.89% | C− |
| 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 5778 quarter by quarter
OO 5778 did not run the same all year. Its best quarter was Jan–Mar 2026 at 81.2% on time and its weakest Jul–Sep 2026 at 46.3%, a swing of 35 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 flights70.0%
- Oct–Dec 202591 flights72.4%
- Jan–Mar 202690 flights81.2%
- Apr–Jun 202662 flights73.3%
- Jul–Sep 202661 flights46.3%
Scale runs 40% to 85%.
By weekday, OO 5778 did best on Wednesday at 79.5% on time and worst on Thursday at 63.6%. Each day rests on about 48 flights, so a gap of 16 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 5778 runs when it is late
When OO 5778 is late it tends to be very late: 48 of its 93 late arrivals were an hour or more behind, and 22 were two hours or more.
- 15+ min early55 flights17.7%
- Within 15 min163 flights52.4%
- 15–29 min late26 flights8.4%
- 30–59 min late19 flights6.1%
- 1–2 hours late26 flights8.4%
- 2+ hours late22 flights7.1%
Scale runs 0% to 100%.
Share of 311 completed flights by arrival against schedule.
11 of 79 late departures made up the time and arrived on time, 14% of them. In the other direction, 25 flights left on time yet arrived 15 minutes late or more, so that delay built up after pushback: in the air, in a holding pattern or on the ground at DEN.
The worst days
Worst days for OO 5778
The latest arrival of the period was on 6 August 2026, 16 hours 38 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 6 August 2026 | 16 hours 38 minutes | Late-arriving aircraft |
| 30 November 2025 | 3 hours 58 minutes | Late-arriving aircraft |
| 25 July 2026 | 3 hours 48 minutes | Extreme weather |
| 5 June 2026 | 3 hours 29 minutes | Extreme weather |
| 16 July 2026 | 3 hours 16 minutes | Late-arriving aircraft |
Delay causes
Why OO 5778 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 7,987 reported delay minutes.
- 38%Late-arriving aircraft
- 28%National Airspace System
- 19%Extreme weather
- 15%Carrier
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 3.2 times the usual weather exposure. The split is drawn from 7,987 delay minutes reported on OO 5778.
Cancellations run at 6.89%, against 1.89% nationally. That is about one flight in fifteen 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
15.4% 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 one other city pair in the data, including ORD to FWA (21), but none flew often enough under OO 5778 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. 334 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 5778
For a booking, the cancellation rate is the figure to plan around on OO 5778: 6.89% of its 334 scheduled flights did not operate. A late arrival costs an hour and a half, 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 5766 on the same route90.1%
- SkyWest Airlines 5774 on the same route76.9%
- 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
- 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.