Flight number record
OO 5124
SkyWest Airlines · Chicago to Eau Claire
- Route
- ORD → EAU
- Departs
- 21:55
- Flights
- 352
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 5124, 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 5124 sits in the middle of the pack with a C−. About seven flights in ten arrive on time by the DOT's definition, 8 points worse than the national rate of 77.3%. The late ones land close to two hours behind schedule. That rests on 352 flights, with a median arrival 1 minute early.
The national on-time rate over the same period is 77.3%, so OO 5124 runs 8 points behind the country as a whole. Across a thousand flights that is about 80 extra late arrivals.
Key figures
On time
69.3%
Arrivals under 15 minutes late, of 323 completed flights
Avg delay
111 min
Across delayed arrivals only, not all flights
Cancelled
6.82%
National rate is 1.89%
1 hour+ late
13.3%
National rate is 8.3%
These figures cover 352 flights between September 2025 and August 2026. Beyond the headline rate, 13.3% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When OO 5124 flies
OO 5124 flies ORD to EAU without a single fixed slot. Its most common scheduled departure was 21:55, used on 92 of 352 flights, with 21:20 (52 flights) and 21:50 (48 flights) next.
- Departs 21:5592 flights26.1%
- Departs 21:2052 flights14.8%
- Departs 21:5048 flights13.6%
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 21:55 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and OO 5124 runs level with that at 69.3%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
OO 5124 next to ORD to EAU
Every carrier on ORD to EAU combined arrived on time 68.0% of the time across 625 flights, so OO 5124 is about level with it. Across its whole network SkyWest Airlines managed 78.7%, which this flight trails by 9 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 5124thin sample | 352 | 69.3% | 111 min | 6.82% | C− |
| All SkyWest Airlines on ORD–EAU | 625 | 68.0% | 100 min | 5.28% | C− |
| All carriers on ORD–EAU | 625 | 68.0% | 100 min | 5.28% | C− |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 5124 quarter by quarter
Quarter by quarter OO 5124 held fairly steady: 65.9% in Oct–Dec 2025, 69.5% in Jan–Mar 2026, 69.2% in Apr–Jun 2026 and 69.0% in Jul–Sep 2026. A spread of 4 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.
- Jul–Sep 202524 flights—
- Oct–Dec 202589 flights65.9%
- Jan–Mar 202690 flights69.5%
- Apr–Jun 202687 flights69.2%
- Jul–Sep 202662 flights69.0%
Scale runs 55% to 75%. Rows with fewer than 30 flights show a dash.
By weekday, OO 5124 ranged from 64.4% on Saturday to 74.5% on Monday. With about 50 flights behind each day, a spread of 10 points is inside normal variation, so the day you fly is not worth changing for this flight.
Arrival by arrival
How late OO 5124 runs when it is late
The 99 late arrivals split 24 under half an hour, 32 between 30 and 60 minutes, and 43 an hour or more.
- 15+ min early66 flights20.4%
- Within 15 min158 flights48.9%
- 15–29 min late24 flights7.4%
- 30–59 min late32 flights9.9%
- 1–2 hours late18 flights5.6%
- 2+ hours late25 flights7.7%
Scale runs 0% to 100%.
Share of 323 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 82 departures that left 15 minutes late or more, only 5 made it up before arrival. In the other direction, 22 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 EAU.
The worst days
Worst days for OO 5124
The latest arrival of the period was on 2 December 2025, 14 hours 43 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On three of the five worst days the largest share was filed as extreme weather.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 2 December 2025 | 14 hours 43 minutes | Late-arriving aircraft |
| 18 October 2025 | 14 hours 28 minutes | Extreme weather |
| 17 April 2026 | 11 hours 47 minutes | Extreme weather |
| 23 April 2026 | 11 hours 18 minutes | Extreme weather |
| 13 May 2026 | 10 hours 25 minutes | Late-arriving aircraft |
Delay causes
Why OO 5124 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 11,000 reported delay minutes.
- 33%Late-arriving aircraft
- 27%Extreme weather
- 24%Carrier
- 16%National Airspace System
Extreme weather accounts for 27% 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 4.5 times the usual weather exposure. The split is drawn from 11,003 delay minutes reported on OO 5124.
Cancellations run at 6.82%, against 1.89% nationally. That is about one flight in fifteen 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
13.3% 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 two other city pairs in the data, including ORD to PLN (3) and PLN to ORD (3), but none flew often enough under OO 5124 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ORD to EAU only.
One caution: this is a thin sample. 352 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 5124
For a booking, the cancellation rate is the figure to plan around on OO 5124: 6.82% of its 352 scheduled flights did not operate. A late arrival costs close to two hours, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- 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
- Why the first flight of the morning is statistically safest
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.