Flight number record
OO 4646
SkyWest Airlines · Akron to Chicago
- Route
- CAK → ORD
- Departs
- 07:00
- Flights
- 328
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 4646, 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 4646 earns a B−. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 7 points better than the national rate of 77.3%. When something does go wrong the average delay runs about 3.1 hours. That rests on 328 flights, with a median arrival 9 minutes early.
Set against the rest of the country, OO 4646's record is 7 points better than the US average of 77.3%. That gap is worth roughly 71 fewer late arrivals for every thousand flights.
Key figures
On time
84.4%
Arrivals under 15 minutes late, of 314 completed flights
Avg delay
186 min
Across delayed arrivals only, not all flights
Cancelled
4.27%
National rate is 1.89%
1 hour+ late
9.9%
National rate is 8.3%
These figures cover 328 flights between September 2025 and August 2026. Beyond the headline rate, 9.9% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When OO 4646 flies
OO 4646 flies CAK to ORD without a single fixed slot. Its most common scheduled departure was 07:00, used on 142 of 328 flights, with 07:15 (51 flights) next.
- Departs 07:00142 flights43.3%
- Departs 07:1551 flights15.5%
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 07:00 departure sits in the 5am–8am window. Across every US flight scheduled in that window the on-time rate is 89.3%, and OO 4646 runs 5 points worse at 84.4%. 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 4646 next to CAK to ORD
Every carrier on CAK to ORD combined arrived on time 72.5% of the time across 2,088 flights, so OO 4646 is 12 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 72.9% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight beats by 6 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4646thin sample | 328 | 84.4% | 186 min | 4.27% | B− |
| All SkyWest Airlines on CAK–ORD | 1,479 | 72.9% | 125 min | 4.87% | C− |
| All carriers on CAK–ORD | 2,088 | 72.5% | 120 min | 5.22% | C− |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 4646 quarter by quarter
OO 4646 did not run the same all year. Its best quarter was Jul–Sep 2025 at 96.7% on time and its weakest Jan–Mar 2026 at 75.6%, a swing of 21 points on roughly 66 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 flights96.7%
- Oct–Dec 202592 flights83.5%
- Jan–Mar 202688 flights75.6%
- Apr–Jun 202656 flights90.4%
- Jul–Sep 202662 flights86.4%
Scale runs 65% to 100%.
By weekday, OO 4646 did best on Thursday at 91.3% on time and worst on Saturday at 74.4%. Each day rests on about 47 flights, so a gap of 17 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 4646 runs when it is late
OO 4646 often beats the schedule: 123 of 314 completed flights, 39%, arrived 15 minutes or more early. When OO 4646 is late it tends to be very late: 31 of its 49 late arrivals were an hour or more behind, and 26 were two hours or more.
- 15+ min early123 flights39.2%
- Within 15 min142 flights45.2%
- 15–29 min late14 flights4.5%
- 30–59 min late4 flights1.3%
- 1–2 hours late5 flights1.6%
- 2+ hours late26 flights8.3%
Scale runs 0% to 100%.
Share of 314 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 39 departures that left 15 minutes late or more, only 3 made it up before arrival. 13 flights left on time and still arrived late.
The worst days
Worst days for OO 4646
The latest arrival of the period was on 1 December 2025, 12 hours 51 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 |
|---|---|---|
| 1 December 2025 | 12 hours 51 minutes | Carrier |
| 16 April 2026 | 11 hours 9 minutes | Carrier |
| 13 September 2025 | 10 hours 40 minutes | Late-arriving aircraft |
| 20 August 2026 | 9 hours 22 minutes | Carrier |
| 27 March 2026 | 7 hours 24 minutes | Late-arriving aircraft |
Delay causes
Why OO 4646 runs late
Carrier accounts for 67% of the 9,095 delay minutes carriers reported here, and the remaining four split what is left.
- 67%Carrier
- 17%Late-arriving aircraft
- 9%Extreme weather
- 6%National Airspace System
The largest share of delay minutes, 67%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 6,119 of the 9,095 delay minutes reported here. The split is drawn from 9,095 delay minutes reported on OO 4646.
Cancellations run at 4.27%, 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
9.9% 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 three other city pairs in the data, including ORD to ASE (34), ATW to DEN (1) and CID to ORD (1), but none flew often enough under OO 4646 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to CAK to ORD only.
One caution: this is a thin sample. 328 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 4646
For a booking, the cancellation rate is the figure to plan around on OO 4646: 4.27% of its 328 scheduled flights did not operate. A late arrival costs about 3.1 hours, but a cancellation costs the day, so leave a later option open.
Related
Where to go next
- CAK to ORD, every carrier and departure
- ORD to CAK, the return direction
- SkyWest Airlines 4752 on the same route71.2%
- SkyWest Airlines 4698 on the same route62.0%
- 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
- What a cancellation rate actually tells you (and what it hides)
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.