Flight number record
OO 5874
SkyWest Airlines · Chicago to Peoria
- Route
- ORD → PIA
- Departs
- 15:35
- Flights
- 304
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 304 flights, with a median arrival 3 minutes late.
The national on-time rate over the same period is 77.3%, so OO 5874 runs 18 points behind the country as a whole. Across a thousand flights that is about 179 extra late arrivals.
Key figures
On time
59.4%
Arrivals under 15 minutes late, of 293 completed flights
Avg delay
78 min
Across delayed arrivals only, not all flights
Cancelled
3.62%
National rate is 1.89%
1 hour+ late
19.1%
National rate is 8.3%
These figures cover 304 flights between September 2025 and August 2026. Beyond the headline rate, 19.1% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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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 188 of 304 flights, with 15:40 (68 flights) next.
- Departs 15:35188 flights61.8%
- Departs 15:4068 flights22.4%
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 15:35 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 71.9%, and OO 5874 runs 13 points worse at 59.4%. 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 5874 next to ORD to PIA
Every carrier on ORD to PIA combined arrived on time 70.1% of the time across 2,213 flights, so OO 5874 is 11 points behind it. SkyWest flew 1,212 flights on the same city pair under all its flight numbers, including this one, and those ran 67.2% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight trails by 19 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 5874thin sample | 304 | 59.4% | 78 min | 3.62% | D− |
| All SkyWest Airlines on ORD–PIA | 1,212 | 67.2% | 74 min | 4.37% | C− |
| All carriers on ORD–PIA | 2,213 | 70.1% | 68 min | 4.52% | C− |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 5874 quarter by quarter
OO 5874 did not run the same all year. Its best quarter was Jul–Sep 2025 at 66.7% on time and its weakest Jan–Mar 2026 at 49.4%, a swing of 17 points on roughly 61 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 flights66.7%
- Oct–Dec 202589 flights64.7%
- Jan–Mar 202685 flights49.4%
- Apr–Jun 202656 flights60.0%
- Jul–Sep 202644 flights61.9%
Scale runs 40% to 70%.
By weekday, OO 5874 did best on Friday at 69.0% on time and worst on Sunday at 40.5%. Each day rests on about 43 flights, so a gap of 29 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 5874 runs when it is late
The 119 late arrivals split 31 under half an hour, 32 between 30 and 60 minutes, and 56 an hour or more.
- 15+ min early43 flights14.7%
- Within 15 min131 flights44.7%
- 15–29 min late31 flights10.6%
- 30–59 min late32 flights10.9%
- 1–2 hours late31 flights10.6%
- 2+ hours late25 flights8.5%
Scale runs 0% to 100%.
Share of 293 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 96 departures that left 15 minutes late or more, only 4 made it up before arrival. In the other direction, 27 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 PIA.
The worst days
Worst days for OO 5874
The latest arrival of the period was on 25 January 2026, 5 hours 7 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. The five worst days are spread across January, May, November, December and September, with no single month standing out.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 25 January 2026 | 5 hours 7 minutes | Late-arriving aircraft |
| 13 May 2026 | 4 hours 50 minutes | Carrier |
| 30 November 2025 | 4 hours 30 minutes | National Airspace System |
| 29 December 2025 | 4 hours 9 minutes | Late-arriving aircraft |
| 13 September 2025 | 3 hours 35 minutes | Extreme weather |
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 9,290 reported delay minutes.
- 30%Carrier
- 29%Late-arriving aircraft
- 27%National Airspace System
- 14%Extreme weather
Extreme weather accounts for 14% 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 2.3 times the usual weather exposure. The split is drawn from 9,290 delay minutes reported on OO 5874.
Cancellations run at 3.62%, 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
19.1% 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.
The same number turns up on one other city pair in the data, including ECP to ORD (53), 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. 304 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: 3.62% of its 304 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.
Related
Where to go next
- ORD to PIA, every carrier and departure
- PIA to ORD, the return direction
- Chicago O'Hare International (ORD) 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
- What a cancellation rate actually tells you (and what it hides)
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.