Flight number record

OO 5817

SkyWest Airlines · Denver to Durango

Route: DEN → DRO
Departs: 15:45
Flights: 364
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5817, 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 5817 lands a B−, 2 points worse than the national rate of 77.6%. About one flight in four arrives 15 minutes late or worse, and those flights are late by about an hour on average. That is a workable record, not a spotless one. That rests on 364 flights, with a median arrival 6 minutes early.

On time

76.1%

Arrivals under 15 minutes late, of 351 completed flights

Avg delay

64 min

Across delayed arrivals only, not all flights

Cancelled

3.02%

National rate is 1.81%

1 hour+ late

9.4%

National rate is 8.1%

These figures cover 364 flights between July 2025 and June 2026. Beyond the headline rate, 9.4% 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 5817 flies

OO 5817 flies DEN to DRO without a single fixed slot. Its most common scheduled departure was 15:45, used on 195 of 364 flights, with 15:35 (58 flights) and 15:42 (53 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 15:45195 flights53.6%
Departs 15:3558 flights15.9%
Departs 15:4253 flights14.6%

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 15:45 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and OO 5817 runs 4 points better at 76.1%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

OO 5817 next to DEN to DRO

Every carrier on DEN to DRO combined arrived on time 79.7% of the time across 2,191 flights, so OO 5817 is 4 points behind it. SkyWest flew 1,460 flights on the same city pair under all its flight numbers, including this one, and those ran 82.0% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 3 points.

OO 5817 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5817thin sample	364	76.1%	64 min	3.02%	B−
All SkyWest Airlines on DEN–DRO	1,460	82.0%	73 min	1.51%	B
All carriers on DEN–DRO	2,191	79.7%	67 min	1.14%	B
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 5817 quarter by quarter

OO 5817 did not run the same all year. Its best quarter was Oct–Dec 2025 at 81.9% on time and its weakest Jul–Sep 2025 at 70.3%, a swing of 12 points on roughly 91 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 202592 flights70.3%
Oct–Dec 202591 flights81.9%
Jan–Mar 202690 flights78.2%
Apr–Jun 202691 flights74.4%

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

By weekday, OO 5817 did best on Tuesday at 86.0% on time and worst on Friday at 69.4%. Each day rests on about 52 flights, so a gap of 17 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 5817 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 5,359 reported delay minutes.

Late-arriving aircraft
37%
Carrier
29%
Extreme weather
19%
National Airspace System
15%

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 3.0 times the usual weather exposure. The split is drawn from 5,359 delay minutes reported on OO 5817.

Cancellations run at 3.02%, against 1.81% nationally. That is roughly one flight in 30 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. 9.4% 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.

Every one of the 364 flights under OO 5817 in the data flew DEN to DRO. The number was not reused on any other city pair, which makes this a clean record of one route.

One caution: this is a thin sample. 364 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 5817

For a booking, the cancellation rate is the figure to plan around on OO 5817: 3.02% of its 364 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