Flight number record

OO 5124

SkyWest Airlines · Chicago to Eau Claire

Route: ORD → EAU
Departs: 21:20
Flights: 350
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 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 draws a C−. About one flight in three arrives at least 15 minutes late, and the typical late arrival is close to two hours behind schedule. Build slack into anything you connect to. That rests on 350 flights, with a median arrival right on schedule.

The national on-time rate over the same period is 77.6%, so OO 5124 runs 10 points behind the country as a whole. Across a thousand flights that is about 101 extra late arrivals.

On time

67.5%

Arrivals under 15 minutes late, of 323 completed flights

Avg delay

107 min

Across delayed arrivals only, not all flights

Cancelled

6.29%

National rate is 1.81%

1 hour+ late

14.2%

National rate is 8.1%

These figures cover 350 flights between July 2025 and June 2026. Beyond the headline rate, 14.2% 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 5124 flies

OO 5124 flies ORD to EAU without a single fixed slot. Its most common scheduled departure was 21:20, used on 52 of 350 flights, with 21:55 (51 flights) and 21:50 (48 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 21:2052 flights14.9%
Departs 21:5551 flights14.6%
Departs 21:5048 flights13.7%

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 21:20 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.5%, and OO 5124 runs 3 points worse at 67.5%. 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 5124 next to ORD to EAU

Every carrier on ORD to EAU combined arrived on time 67.3% of the time across 624 flights, so OO 5124 is about level with it. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 12 points.

OO 5124 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 5124thin sample	350	67.5%	107 min	6.29%	C−
All SkyWest Airlines on ORD–EAU	624	67.3%	98 min	4.97%	C−
All carriers on ORD–EAU	624	67.3%	98 min	4.97%	C−
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 5124 quarter by quarter

Quarter by quarter OO 5124 held fairly steady: 65.4% in Jul–Sep 2025, 65.9% in Oct–Dec 2025, 69.5% in Jan–Mar 2026 and 69.2% in Apr–Jun 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 202584 flights65.4%
Oct–Dec 202589 flights65.9%
Jan–Mar 202690 flights69.5%
Apr–Jun 202687 flights69.2%

Scale runs 55% to 75%. Rows with fewer than 30 flights show a dash.

By weekday, OO 5124 did best on Friday at 72.3% on time and worst on Tuesday at 59.1%. Each day rests on about 50 flights, so a gap of 13 points is worth noticing but could still narrow in another year.

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.

Late-arriving aircraft
40%
Carrier
23%
Extreme weather
23%
National Airspace System
15%

Extreme weather accounts for 23% 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 3.7 times the usual weather exposure. The split is drawn from 11,240 delay minutes reported on OO 5124.

Cancellations run at 6.29%, against 1.81% 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

For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 14.2% 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 two other city pairs in the data, including PLN to ORD (5) and ORD to PLN (5), 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. 350 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: 6.29% of its 350 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.

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