Flight number record

OO 4766

SkyWest Airlines · Chicago to Oklahoma City

Route: ORD → OKC
Departs: 16:45
Flights: 336
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4766, 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 4766 sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 6 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 336 flights, with a median arrival 2 minutes early.

The national on-time rate over the same period is 77.6%, so OO 4766 runs 6 points behind the country as a whole. Across a thousand flights that is about 61 extra late arrivals.

On time

71.5%

Arrivals under 15 minutes late, of 326 completed flights

Avg delay

78 min

Across delayed arrivals only, not all flights

Cancelled

2.98%

National rate is 1.81%

1 hour+ late

11.3%

National rate is 8.1%

These figures cover 336 flights between July 2025 and June 2026. Beyond the headline rate, 11.3% 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 4766 flies

OO 4766 flies ORD to OKC without a single fixed slot. Its most common scheduled departure was 16:45, used on 107 of 336 flights, with 15:35 (41 flights) and 15:55 (37 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 16:45107 flights31.8%
Departs 15:3541 flights12.2%
Departs 15:5537 flights11.0%

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 16:45 departure sits in the 2pm–5pm window. Across every US flight scheduled in that window the on-time rate is 72.4%, and OO 4766 runs level with that at 71.5%. Midday slots inherit some of the morning's delays without yet carrying the full weight of the evening's.

Against the route

OO 4766 next to ORD to OKC

Every carrier on ORD to OKC combined arrived on time 69.3% of the time across 2,594 flights, so OO 4766 is 2 points ahead of it. SkyWest flew 2,356 flights on the same city pair under all its flight numbers, including this one, and those ran 68.0% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 8 points.

OO 4766 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4766thin sample	336	71.5%	78 min	2.98%	C
All SkyWest Airlines on ORD–OKC	2,356	68.0%	85 min	3.10%	C−
All carriers on ORD–OKC	2,594	69.3%	84 min	2.93%	C
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 4766 quarter by quarter

Quarter by quarter OO 4766 held fairly steady: 74.2% in Jul–Sep 2025, 72.7% in Oct–Dec 2025, 69.5% in Jan–Mar 2026 and 69.7% in Apr–Jun 2026. A spread of 5 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202591 flights74.2%
Oct–Dec 202569 flights72.7%
Jan–Mar 202685 flights69.5%
Apr–Jun 202691 flights69.7%

Scale runs 60% to 80%. Rows with fewer than 30 flights show a dash.

By weekday, OO 4766 did best on Thursday at 78.7% on time and worst on Tuesday at 62.7%. Each day rests on about 48 flights, so a gap of 16 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 4766 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 7,284 reported delay minutes.

Late-arriving aircraft
33%
National Airspace System
31%
Carrier
25%
Extreme weather
10%
Security
1%

No single cause dominates. late-arriving aircraft at 33%, national airspace system at 31% and carrier at 25% split the 7,284 reported delay minutes between them. An even spread like this usually means the operation is running close to its designed capacity with no one obvious weak point, and it is the hardest pattern for a traveller to route around. The split is drawn from 7,284 delay minutes reported on OO 4766.

Cancellations run at 2.98%, against 1.81% nationally. That is roughly 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. 11.3% 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 693 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 four other city pairs in the data, including PIT to ORD (16), MSP to ORD (5) and ORD to MSN (2), but none flew often enough under OO 4766 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ORD to OKC only.

One caution: this is a thin sample. 336 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 4766

For a booking, the cancellation rate is the figure to plan around on OO 4766: 2.98% of its 336 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