Flight number record
OO 4780
SkyWest Airlines · Chicago to Akron
- Route
- ORD → CAK
- Departs
- 10:50
- Flights
- 361
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 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 lands a B−, level with the national rate of 77.3%. About one flight in four arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That rests on 361 flights, with a median arrival 4 minutes early.
Key figures
On time
76.7%
Arrivals under 15 minutes late, of 344 completed flights
Avg delay
78 min
Across delayed arrivals only, not all flights
Cancelled
3.88%
National rate is 1.89%
1 hour+ late
9.0%
National rate is 8.3%
These figures cover 361 flights between September 2025 and August 2026. Beyond the headline rate, 9.0% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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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 10:41 (82 flights) and 10:45 (65 flights) next.
- Departs 10:5091 flights25.2%
- Departs 10:4182 flights22.7%
- Departs 10:4565 flights18.0%
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 10:50 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and OO 4780 runs 7 points worse at 76.7%. Early departures usually start with an aircraft that has not flown yet that day, which is most of why the window does well.
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Against the route
OO 4780 next to ORD to CAK
Every carrier on ORD to CAK combined arrived on time 63.6% of the time across 2,089 flights, so OO 4780 is 13 points ahead of it. SkyWest flew 1,479 flights on the same city pair under all its flight numbers, including this one, and those ran 64.9% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight trails by 2 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4780thin sample | 361 | 76.7% | 78 min | 3.88% | B− |
| All SkyWest Airlines on ORD–CAK | 1,479 | 64.9% | 88 min | 4.87% | D− |
| All carriers on ORD–CAK | 2,089 | 63.6% | 95 min | 5.36% | D− |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 4780 quarter by quarter
OO 4780 did not run the same all year. Its best quarter was Jul–Sep 2025 at 90.0% on time and its weakest Jan–Mar 2026 at 71.1%, a swing of 19 points on roughly 72 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 flights90.0%
- Oct–Dec 202590 flights79.5%
- Jan–Mar 202688 flights71.1%
- Apr–Jun 202691 flights75.0%
- Jul–Sep 202662 flights76.7%
Scale runs 65% to 95%.
By weekday, OO 4780 did best on Thursday at 83.0% on time and worst on Friday at 64.6%. Each day rests on about 52 flights, so a gap of 18 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 4780 runs when it is late
OO 4780 often beats the schedule: 88 of 344 completed flights, 26%, arrived 15 minutes or more early. The 80 late arrivals split 19 under half an hour, 30 between 30 and 60 minutes, and 31 an hour or more.
- 15+ min early88 flights25.6%
- Within 15 min176 flights51.2%
- 15–29 min late19 flights5.5%
- 30–59 min late30 flights8.7%
- 1–2 hours late16 flights4.7%
- 2+ hours late15 flights4.4%
Scale runs 0% to 100%.
Share of 344 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 67 departures that left 15 minutes late or more, only 5 made it up before arrival. In the other direction, 18 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 CAK.
The worst days
Worst days for OO 4780
The latest arrival of the period was on 17 March 2026, 6 hours 8 minutes behind schedule; most of its delay minutes were filed as carrier-caused (crew, maintenance, fuelling, baggage). The same cause led on three of the five worst days.
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 17 March 2026 | 6 hours 8 minutes | Carrier |
| 16 April 2026 | 5 hours 17 minutes | National Airspace System |
| 29 December 2025 | 4 hours 36 minutes | Late-arriving aircraft |
| 3 April 2026 | 3 hours 48 minutes | Carrier |
| 22 September 2025 | 3 hours 25 minutes | Carrier |
Delay causes
Why OO 4780 runs late
Carrier accounts for 47% of the 6,242 delay minutes carriers reported here, and the remaining four split what is left.
- 47%Carrier
- 26%Late-arriving aircraft
- 21%National Airspace System
- 5%Extreme weather
The largest share of delay minutes, 47%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 2,932 of the 6,242 delay minutes reported here. The split is drawn from 6,242 delay minutes reported on OO 4780.
Cancellations run at 3.88%, against 1.89% nationally. That is about one flight in 25 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
9.0% 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 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: 3.88% of its 361 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 CAK, every carrier and departure
- CAK to ORD, the return direction
- SkyWest Airlines 5352 on the same route55.1%
- SkyWest Airlines 5982 on the same route62.0%
- SkyWest Airlines 5358 on the same route63.8%
- 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
- How often a connection fails at the major US hubs
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.