Flight number record
OO 5817
SkyWest Airlines · Denver to Durango
- Route
- DEN → DRO
- Departs
- 15:45
- Flights
- 363
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 sits in the middle of the pack with a B−. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.3%. The late ones land about an hour behind schedule. That rests on 363 flights, with a median arrival 5 minutes early.
Key figures
On time
75.4%
Arrivals under 15 minutes late, of 350 completed flights
Avg delay
61 min
Across delayed arrivals only, not all flights
Cancelled
3.31%
National rate is 1.89%
1 hour+ late
9.4%
National rate is 8.3%
These figures cover 363 flights between September 2025 and August 2026. Beyond the headline rate, 9.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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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 204 of 363 flights, with 15:35 (58 flights) and 15:42 (40 flights) next.
- Departs 15:45204 flights56.2%
- Departs 15:3558 flights16.0%
- Departs 15:4240 flights11.0%
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 15:45 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and OO 5817 runs 4 points better at 75.4%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.
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Against the route
OO 5817 next to DEN to DRO
Every carrier on DEN to DRO combined arrived on time 80.2% of the time across 2,201 flights, so OO 5817 is 5 points behind it. SkyWest flew 1,471 flights on the same city pair under all its flight numbers, including this one, and those ran 82.6% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight trails by 3 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 5817thin sample | 363 | 75.4% | 61 min | 3.31% | B− |
| All SkyWest Airlines on DEN–DRO | 1,471 | 82.6% | 74 min | 1.36% | B |
| All carriers on DEN–DRO | 2,201 | 80.2% | 69 min | 0.95% | B+ |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 5817 quarter by quarter
OO 5817 did not run the same all year. Its best quarter was Jul–Sep 2025 at 83.3% on time and its weakest Jul–Sep 2026 at 60.0%, a swing of 23 points on roughly 73 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 flights83.3%
- Oct–Dec 202591 flights81.9%
- Jan–Mar 202690 flights78.2%
- Apr–Jun 202691 flights74.4%
- Jul–Sep 202661 flights60.0%
Scale runs 50% to 90%.
By weekday, OO 5817 did best on Tuesday at 88.0% on time and worst on Friday at 65.3%. Each day rests on about 52 flights, so a gap of 23 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 5817 runs when it is late
The 86 late arrivals split 20 under half an hour, 33 between 30 and 60 minutes, and 33 an hour or more.
- 15+ min early61 flights17.4%
- Within 15 min203 flights58.0%
- 15–29 min late20 flights5.7%
- 30–59 min late33 flights9.4%
- 1–2 hours late25 flights7.1%
- 2+ hours late8 flights2.3%
Scale runs 0% to 100%.
Share of 350 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 77 departures that left 15 minutes late or more, only 8 made it up before arrival. 17 flights left on time and still arrived late.
The worst days
Worst days for OO 5817
The latest arrival of the period was on 8 March 2026, 3 hours 52 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On three of the five worst days the largest share was filed as extreme weather.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 8 March 2026 | 3 hours 52 minutes | Late-arriving aircraft |
| 19 December 2025 | 3 hours 1 minute | Extreme weather |
| 10 July 2026 | 2 hours 57 minutes | Carrier |
| 28 July 2026 | 2 hours 53 minutes | Extreme weather |
| 25 January 2026 | 2 hours 32 minutes | Extreme weather |
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 5,266 reported delay minutes.
- 34%Carrier
- 27%Late-arriving aircraft
- 21%National Airspace System
- 19%Extreme weather
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 3.1 times the usual weather exposure. The split is drawn from 5,266 delay minutes reported on OO 5817.
Cancellations run at 3.31%, against 1.89% nationally. That is about 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
9.4% 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.
Every one of the 363 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. 363 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: 3.31% of its 363 scheduled flights did not operate. A late arrival costs about an hour, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- DEN to DRO, every carrier and departure
- DRO to DEN, the return direction
- SkyWest Airlines 5224 on the same route82.7%
- United Airlines 1217 on the same route84.8%
- United Airlines 1390 on the same route62.9%
- 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
- How often a connection fails at the major US hubs
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.