Flight number record

OO 4780

SkyWest Airlines · Chicago to Akron

Route: ORD → CAK
Departs: 10:50
Flights: 361
Period: July 2025 to June 2026

Historical statistics for July 2025 to June 2026, not live status. For today’s OO 4780, 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 4780 sits in the middle of the pack with a B−. Close to three flights in four arrive on time by the DOT's definition, 2 points worse than the national rate of 77.6%. The late ones land an hour and a half behind schedule. That rests on 361 flights, with a median arrival 5 minutes early.

On time

75.9%

Arrivals under 15 minutes late, of 345 completed flights

Avg delay

85 min

Across delayed arrivals only, not all flights

Cancelled

3.60%

National rate is 1.81%

1 hour+ late

10.7%

National rate is 8.1%

These figures cover 361 flights between July 2025 and June 2026. Beyond the headline rate, 10.7% 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 4780 flies

OO 4780 flies ORD to CAK without a single fixed slot. Its most common scheduled departure was 10:50, used on 91 of 361 flights, with 10:40 (75 flights) and 10:45 (65 flights) next. Carriers retime flights through the season, so the rates here blend slightly different positions in the aircraft's day.

Departs 10:5091 flights25.2%
Departs 10:4075 flights20.8%
Departs 10:4565 flights18.0%

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 10:50 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 84.1%, and OO 4780 runs 8 points worse at 75.9%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.

Against the route

OO 4780 next to ORD to CAK

Every carrier on ORD to CAK combined arrived on time 64.1% of the time across 1,964 flights, so OO 4780 is 12 points ahead of it. SkyWest flew 1,474 flights on the same city pair under all its flight numbers, including this one, and those ran 65.5% on time. Across its whole network SkyWest Airlines managed 79.0%, which this flight trails by 3 points.

OO 4780 against its route and carrier
Compared with	Flights	On time	Avg delay	Cancelled	Grade
OO 4780thin sample	361	75.9%	85 min	3.60%	B−
All SkyWest Airlines on ORD–CAK	1,474	65.5%	92 min	4.68%	C−
All carriers on ORD–CAK	1,964	64.1%	99 min	5.35%	D−
SkyWest Airlines, whole network	852,935	79.0%	88 min	1.77%	B

Across the year

OO 4780 quarter by quarter

Quarter by quarter OO 4780 held fairly steady: 78.0% in Jul–Sep 2025, 79.5% in Oct–Dec 2025, 71.1% in Jan–Mar 2026 and 75.0% in Apr–Jun 2026. A spread of 8 points is about what a sample of this size moves on its own, so the annual figure is a fair summary.

Jul–Sep 202592 flights78.0%
Oct–Dec 202590 flights79.5%
Jan–Mar 202688 flights71.1%
Apr–Jun 202691 flights75.0%

Scale runs 65% to 85%. Rows with fewer than 30 flights show a dash.

By weekday, OO 4780 did best on Tuesday at 83.0% on time and worst on Friday at 58.3%. Each day rests on about 52 flights, so a gap of 25 points is worth noticing but could still narrow in another year.

Delay causes

Why OO 4780 runs late

One category carries most of the weight here. Carrier accounts for 45% of the 7,053 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.

Carrier
45%
Late-arriving aircraft
34%
National Airspace System
17%
Extreme weather
5%

The largest share of delay minutes, 45%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 3,150 of the 7,053 delay minutes reported here. The split is drawn from 7,053 delay minutes reported on OO 4780.

Cancellations run at 3.60%, 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. 10.7% 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 PIA to ORD (11) and SHV to IAH (1), but none flew often enough under OO 4780 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ORD to CAK only.

One caution: this is a thin sample. 361 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 4780

For a booking, the cancellation rate is the figure to plan around on OO 4780: 3.60% of its 361 scheduled flights did not operate. A late arrival costs an hour and a half, 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