Flight number record

OO 5600

SkyWest Airlines · Denver to Peoria

Route: DEN → PIA
Departs: 17:30
Flights: 266
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5600, 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 5600 draws a D+. Roughly one flight in three arrives at least 15 minutes late, and the typical late arrival is about an hour behind schedule. Build slack into anything you connect to. That rests on 266 flights, with a median arrival 6 minutes late.

The national on-time rate over the same period is 77.6%, so OO 5600 runs 16 points behind the country as a whole. Across a thousand flights that is about 164 extra late arrivals.

On time

61.2%

Arrivals under 15 minutes late, of 263 completed flights

Avg delay

57 min

Across delayed arrivals only, not all flights

Cancelled

0.38%

National rate is 1.81%

1 hour+ late

11.8%

National rate is 8.1%

These figures cover 266 flights between July 2025 and June 2026. Beyond the headline rate, 11.8% 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 5600 flies

OO 5600 flies DEN to PIA without a single fixed slot. Its most common scheduled departure was 17:30, used on 56 of 266 flights, with 17:45 (52 flights) and 17:38 (49 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 17:3056 flights21.1%
Departs 17:4552 flights19.5%
Departs 17:3849 flights18.4%

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 17:30 departure sits in the 5pm–8pm window. Across every US flight scheduled in that window the on-time rate is 68.2%, and OO 5600 runs 7 points worse at 61.2%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.

Against the route

OO 5600 next to DEN to PIA

Every carrier on DEN to PIA combined arrived on time 64.1% of the time across 433 flights, so OO 5600 is 3 points behind it. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 18 points.

OO 5600 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5600thin sample	266	61.2%	57 min	0.38%	D+
All SkyWest Airlines on DEN–PIA	365	65.6%	57 min	1.37%	C
All carriers on DEN–PIA	433	64.1%	69 min	1.15%	D
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 5600 quarter by quarter

OO 5600 did not run the same all year. Its best quarter was Jan–Mar 2026 at 73.8% on time and its weakest Jul–Sep 2025 at 41.8%, a swing of 32 points on roughly 67 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 flights41.8%
Oct–Dec 202591 flights71.9%
Jan–Mar 202642 flights73.8%
Apr–Jun 202641 flights68.3%

Scale runs 35% to 80%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5600 did best on Wednesday at 71.1% on time and worst on Monday at 50.0%. Each day rests on about 38 flights, so a gap of 21 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 5600 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 5,758 reported delay minutes.

Carrier
36%
National Airspace System
33%
Late-arriving aircraft
19%
Extreme weather
11%

Extreme weather accounts for 11% 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 1.8 times the usual weather exposure. The split is drawn from 5,758 delay minutes reported on OO 5600.

Cancellations are rare at 0.38%, below the national 1.81% and low enough to earn the plus on the grade. Roughly one flight in 100 is called off; the risk here is arriving late, not not arriving.

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. 11.8% 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 793 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 GEG to SFO (24), ORD to OKC (24) and ORD to CHA (15), but none flew often enough under OO 5600 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to DEN to PIA only.

One caution: this is a thin sample. 266 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 5600

For a booking, read OO 5600 as 61.2% on time with 0.38% cancelled over 266 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