Flight number record

OO 5770

SkyWest Airlines · Aspen to Denver

Route: ASE → DEN
Departs: 09:26
Flights: 251
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5770, 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 5770 lands a B−, 5 points better than the national rate of 77.6%. About one flight in six arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That is a workable record, not a spotless one. That rests on 251 flights, with a median arrival 5 minutes early.

Set against the rest of the country, OO 5770's record is 5 points better than the US average of 77.6%. That gap is worth roughly 49 fewer late arrivals for every thousand flights.

On time

82.5%

Arrivals under 15 minutes late, of 240 completed flights

Avg delay

100 min

Across delayed arrivals only, not all flights

Cancelled

3.98%

National rate is 1.81%

1 hour+ late

9.6%

National rate is 8.1%

These figures cover 251 flights between July 2025 and June 2026. Beyond the headline rate, 9.6% 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 5770 flies

OO 5770 flies ASE to DEN without a single fixed slot. Its most common scheduled departure was 09:26, used on 48 of 251 flights, with 09:15 (47 flights) and 08:30 (37 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 09:2648 flights19.1%
Departs 09:1547 flights18.7%
Departs 08:3037 flights14.7%

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 09:26 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and OO 5770 runs level with that at 82.5%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

OO 5770 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 5770 is 7 points ahead of it. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 4 points.

OO 5770 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5770thin sample	251	82.5%	100 min	3.98%	B−
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 5770 quarter by quarter

Quarter by quarter OO 5770 held fairly steady: 79.6% in Jul–Sep 2025, 80.0% in Oct–Dec 2025, 85.4% in Jan–Mar 2026 and 84.1% in Apr–Jun 2026. A spread of 6 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202549 flights79.6%
Oct–Dec 202567 flights80.0%
Jan–Mar 202690 flights85.4%
Apr–Jun 202645 flights84.1%

Scale runs 70% to 90%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5770 did best on Wednesday at 90.9% on time and worst on Sunday at 78.4%. Each day rests on about 36 flights, so a gap of 13 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 5770 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 4,190 reported delay minutes.

Late-arriving aircraft
29%
Extreme weather
26%
Carrier
23%
National Airspace System
22%

Extreme weather accounts for 26% 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 4.2 times the usual weather exposure. The split is drawn from 4,190 delay minutes reported on OO 5770.

Cancellations run at 3.98%, against 1.81% 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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 9.6% 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 SLC to SFO (21) and SFO to SEA (3), but none flew often enough under OO 5770 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. 251 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 5770

For a booking, the cancellation rate is the figure to plan around on OO 5770: 3.98% of its 251 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.

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