Flight number record

OO 5778

SkyWest Airlines · Aspen to Denver

Route: ASE → DEN
Departs: 18:15
Flights: 333
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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−. 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 about an hour behind schedule. That rests on 333 flights, with a median arrival 1 minute early.

The national on-time rate over the same period is 77.6%, so OO 5778 runs 4 points behind the country as a whole. Across a thousand flights that is about 43 extra late arrivals.

On time

73.3%

Arrivals under 15 minutes late, of 307 completed flights

Avg delay

67 min

Across delayed arrivals only, not all flights

Cancelled

7.81%

National rate is 1.81%

1 hour+ late

11.7%

National rate is 8.1%

These figures cover 333 flights between July 2025 and June 2026. Beyond the headline rate, 11.7% 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 5778 flies

OO 5778 flies ASE to DEN without a single fixed slot. Its most common scheduled departure was 18:15, used on 115 of 333 flights, with 17:12 (52 flights) and 18:28 (45 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 18:15115 flights34.5%
Departs 17:1252 flights15.6%
Departs 18:2845 flights13.5%

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 18:15 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and OO 5778 runs 5 points better at 73.3%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

OO 5778 next to ASE to DEN

Every carrier on ASE to DEN combined arrived on time 75.2% of the time across 2,716 flights, so OO 5778 is 2 points behind it. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 6 points.

OO 5778 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5778thin sample	333	73.3%	67 min	7.81%	C−
All SkyWest Airlines on ASE–DEN	2,716	75.2%	102 min	5.15%	B−
All carriers on ASE–DEN	2,716	75.2%	102 min	5.15%	B−
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	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 2025 at 66.2%, a swing of 15 points on roughly 83 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 202590 flights66.2%
Oct–Dec 202591 flights72.4%
Jan–Mar 202690 flights81.2%
Apr–Jun 202662 flights73.3%

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

By weekday, OO 5778 did best on Wednesday at 80.0% on time and worst on Friday at 63.4%. Each day rests on about 48 flights, so a gap of 17 points is worth noticing but could still narrow in another year.

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 5,510 reported delay minutes.

National Airspace System
37%
Carrier
23%
Extreme weather
21%
Late-arriving aircraft
20%

Extreme weather accounts for 21% 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 3.3 times the usual weather exposure. The split is drawn from 5,510 delay minutes reported on OO 5778.

Cancellations run at 7.81%, against 1.81% nationally. That is about one flight in twelve 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. 11.7% 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 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. 333 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: 7.81% of its 333 scheduled flights did not operate. A late arrival costs about 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