Flight number record
OO 5317
SkyWest Airlines · Appleton to Denver
- Route
- ATW → DEN
- Departs
- 08:35
- Flights
- 261
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 5317, 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 5317 lands a B, 3 points better than the national rate of 77.3%. About one flight in five arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That rests on 261 flights, with a median arrival 9 minutes early.
Key figures
On time
80.5%
Arrivals under 15 minutes late, of 257 completed flights
Avg delay
88 min
Across delayed arrivals only, not all flights
Cancelled
1.53%
National rate is 1.89%
1 hour+ late
7.0%
National rate is 8.3%
These figures cover 261 flights between September 2025 and August 2026. The median arrival is 9 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.
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Schedule
When OO 5317 flies
OO 5317 flies ATW to DEN without a single fixed slot. Its most common scheduled departure was 08:35, used on 53 of 261 flights, with 08:30 (52 flights) and 08:20 (37 flights) next.
- Departs 08:3553 flights20.3%
- Departs 08:3052 flights19.9%
- Departs 08:2037 flights14.2%
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 08:35 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and OO 5317 runs 3 points worse at 80.5%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
OO 5317 next to ATW to DEN
Every carrier on ATW to DEN combined arrived on time 81.4% of the time across 410 flights, so OO 5317 is about level with it. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 5317thin sample | 261 | 80.5% | 88 min | 1.53% | B |
| All SkyWest Airlines on ATW–DENthin sample | 262 | 80.6% | 88 min | 1.53% | B |
| All carriers on ATW–DEN | 410 | 81.4% | 84 min | 1.22% | B |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 5317 quarter by quarter
OO 5317 did not run the same all year. Its best quarter was Jul–Sep 2025 at 93.3% on time and its weakest Oct–Dec 2025 at 76.9%, a swing of 16 points on roughly 65 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 flights93.3%
- Oct–Dec 202591 flights76.9%
- Jan–Mar 202690 flights77.9%
- Apr–Jun 202650 flights84.0%
Scale runs 70% to 100%.
By weekday, OO 5317 did best on Thursday at 86.5% on time and worst on Wednesday at 71.1%. Each day rests on about 37 flights, so a gap of 15 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 5317 runs when it is late
OO 5317 often beats the schedule: 90 of 257 completed flights, 35%, arrived 15 minutes or more early. The 50 late arrivals split 15 under half an hour, 17 between 30 and 60 minutes, and 18 an hour or more.
- 15+ min early90 flights35.0%
- Within 15 min117 flights45.5%
- 15–29 min late15 flights5.8%
- 30–59 min late17 flights6.6%
- 1–2 hours late11 flights4.3%
- 2+ hours late7 flights2.7%
Scale runs 0% to 100%.
Share of 257 completed flights by arrival against schedule.
A late pushback is often recovered here: of 50 departures that left 15 minutes late or more, 15 still arrived on time. In the other direction, 15 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 5317
The latest arrival of the period was on 28 January 2026, 8 hours 12 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on four of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 28 January 2026 | 8 hours 12 minutes | Carrier |
| 1 May 2026 | 6 hours 29 minutes | Carrier |
| 3 January 2026 | 6 hours 28 minutes | Extreme weather |
| 7 April 2026 | 6 hours 22 minutes | Carrier |
| 30 November 2025 | 4 hours 45 minutes | Carrier |
Delay causes
Why OO 5317 runs late
Carrier accounts for 72% of the 4,377 delay minutes carriers reported here, and the remaining four split what is left.
- 72%Carrier
- 20%Extreme weather
- 9%National Airspace System
- 0%Security
Extreme weather accounts for 20% 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 4,377 delay minutes reported on OO 5317.
Cancellations sit at 1.53% against a national 1.89%, which is ordinary. Diversions add another 0.00%.
Connections and routes
What a delay on this flight costs
7.0% of arrivals land an hour or more late, close to the national 8.3%, so a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last an hour and a half, which a normal layover absorbs.
The 883 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty.
The same number turns up on four other city pairs in the data, including GRB to ORD (22), DEN to SAF (21) and FWA to ORD (1), but none flew often enough under OO 5317 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ATW to DEN only.
One caution: this is a thin sample. 261 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 5317
For a booking, read OO 5317 as 80.5% on time with 1.53% cancelled over 261 flights. Those are rates from the past twelve months, not a forecast for any particular day.
Related
Where to go next
- 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
- Worst months to fly in the US, ranked by the data
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.