Flight number record

OO 5317

SkyWest Airlines · Appleton to Denver

Route: ATW → DEN
Departs: 08:35
Flights: 323
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 323 flights, with a median arrival 8 minutes early.

On time

80.6%

Arrivals under 15 minutes late, of 319 completed flights

Avg delay

82 min

Across delayed arrivals only, not all flights

Cancelled

1.24%

National rate is 1.81%

1 hour+ late

6.6%

National rate is 8.1%

These figures cover 323 flights between July 2025 and June 2026. The median arrival is 8 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.

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 323 flights, with 08:30 (52 flights) and 08:40 (49 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 08:3553 flights16.4%
Departs 08:3052 flights16.1%
Departs 08:4049 flights15.2%

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 08:35 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and OO 5317 runs 4 points worse at 80.6%. 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 5317 next to ATW to DEN

Every carrier on ATW to DEN combined arrived on time 78.8% of the time across 433 flights, so OO 5317 is 2 points ahead of it. Across its whole network SkyWest Airlines managed 79.0%, which this flight beats by 2 points.

OO 5317 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5317thin sample	323	80.6%	82 min	1.24%	B
All SkyWest Airlines on ATW–DENthin sample	341	78.3%	85 min	1.17%	B
All carriers on ATW–DEN	433	78.8%	81 min	0.92%	B+
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 5317 quarter by quarter

Quarter by quarter OO 5317 held fairly steady: 84.8% in Jul–Sep 2025, 76.9% in Oct–Dec 2025, 77.9% in Jan–Mar 2026 and 84.0% in Apr–Jun 2026. A spread of 8 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights84.8%
Oct–Dec 202591 flights76.9%
Jan–Mar 202690 flights77.9%
Apr–Jun 202650 flights84.0%

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

By weekday, OO 5317 did best on Saturday at 86.7% on time and worst on Wednesday at 72.3%. Each day rests on about 46 flights, so a gap of 14 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 5317 runs late

One category carries most of the weight here. Carrier accounts for 71% of the 5,066 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Carrier
71%
Extreme weather
17%
National Airspace System
12%
Security
0%

Extreme weather accounts for 17% 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 2.7 times the usual weather exposure. The split is drawn from 5,066 delay minutes reported on OO 5317.

Cancellations sit at 1.24% against a national 1.81%, which is ordinary. Diversions add another 0.00%.

Connections and routes

What a delay on this flight costs

6.6% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, 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. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.

The same number turns up on three other city pairs in the data, including GRB to ORD (22), FWA to ORD (1) and JAC to DEN (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. 323 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 80.6% on time with 1.24% cancelled over 323 flights. Those are rates from the past twelve months, not a forecast for any particular day.

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