Flight number record

OO 5874

SkyWest Airlines · Chicago to Peoria

Route: ORD → PIA
Departs: 15:35
Flights: 321
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 5874, 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 5874 draws a D−. Roughly one flight in two arrives at least 15 minutes late, and the typical late arrival is a little over an hour behind schedule. Build slack into anything you connect to. That rests on 321 flights, with a median arrival 4 minutes late.

The national on-time rate over the same period is 77.6%, so OO 5874 runs 18 points behind the country as a whole. Across a thousand flights that is about 181 extra late arrivals.

On time

59.5%

Arrivals under 15 minutes late, of 311 completed flights

Avg delay

77 min

Across delayed arrivals only, not all flights

Cancelled

3.12%

National rate is 1.81%

1 hour+ late

18.6%

National rate is 8.1%

These figures cover 321 flights between July 2025 and June 2026. Beyond the headline rate, 18.6% 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 5874 flies

OO 5874 flies ORD to PIA without a single fixed slot. Its most common scheduled departure was 15:35, used on 249 of 321 flights. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 15:35249 flights77.6%

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 15:35 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and OO 5874 runs 13 points worse at 59.5%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

OO 5874 next to ORD to PIA

Every carrier on ORD to PIA combined arrived on time 68.9% of the time across 2,311 flights, so OO 5874 is 9 points behind it. SkyWest flew 1,290 flights on the same city pair under all its flight numbers, including this one, and those ran 65.6% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 20 points.

OO 5874 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5874thin sample	321	59.5%	77 min	3.12%	D−
All SkyWest Airlines on ORD–PIA	1,290	65.6%	75 min	4.50%	C−
All carriers on ORD–PIA	2,311	68.9%	66 min	4.41%	C−
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 5874 quarter by quarter

OO 5874 did not run the same all year. Its best quarter was Oct–Dec 2025 at 64.7% on time and its weakest Jan–Mar 2026 at 49.4%, a swing of 15 points on roughly 80 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 202591 flights63.3%
Oct–Dec 202589 flights64.7%
Jan–Mar 202685 flights49.4%
Apr–Jun 202656 flights60.0%

Scale runs 40% to 70%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5874 did best on Friday at 75.0% on time and worst on Sunday at 40.0%. Each day rests on about 46 flights, so a gap of 35 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 5874 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 9,677 reported delay minutes.

Late-arriving aircraft
34%
National Airspace System
28%
Carrier
27%
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 9,677 delay minutes reported on OO 5874.

Cancellations run at 3.12%, against 1.81% 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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 18.6% 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 same number turns up on one other city pair in the data, including ECP to ORD (12), but none flew often enough under OO 5874 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ORD to PIA only.

One caution: this is a thin sample. 321 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 5874

For a booking, the cancellation rate is the figure to plan around on OO 5874: 3.12% of its 321 scheduled flights did not operate. A late arrival costs a little over 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