Flight number record
OO 4794
SkyWest Airlines · South Bend to Chicago
- Route
- SBN → ORD
- Departs
- 09:10
- Flights
- 329
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 4794, 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 4794 sits in the middle of the pack with a C−. About seven flights in ten arrive on time by the DOT's definition, 8 points worse than the national rate of 77.3%. The late ones land an hour and a half behind schedule. That rests on 329 flights, with a median arrival 1 minute late.
The national on-time rate over the same period is 77.3%, so OO 4794 runs 8 points behind the country as a whole. Across a thousand flights that is about 84 extra late arrivals.
Key figures
On time
68.9%
Arrivals under 15 minutes late, of 318 completed flights
Avg delay
98 min
Across delayed arrivals only, not all flights
Cancelled
3.04%
National rate is 1.89%
1 hour+ late
13.2%
National rate is 8.3%
These figures cover 329 flights between September 2025 and August 2026. Beyond the headline rate, 13.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When OO 4794 flies
OO 4794 flies SBN to ORD without a single fixed slot. Its most common scheduled departure was 09:10, used on 101 of 329 flights, with 09:11 (57 flights) and 09:05 (47 flights) next.
- Departs 09:10101 flights30.7%
- Departs 09:1157 flights17.3%
- Departs 09:0547 flights14.3%
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 09:10 departure sits in the 8am–11am window. Across every US flight scheduled in that window the on-time rate is 83.9%, and OO 4794 runs 15 points worse at 68.9%. 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 4794 next to SBN to ORD
Every carrier on SBN to ORD combined arrived on time 65.5% of the time across 2,790 flights, so OO 4794 is 3 points ahead of it. SkyWest flew 2,777 flights on the same city pair under all its flight numbers, including this one, and those ran 65.7% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight trails by 10 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 4794thin sample | 329 | 68.9% | 98 min | 3.04% | C− |
| All SkyWest Airlines on SBN–ORD | 2,777 | 65.7% | 100 min | 3.85% | C− |
| All carriers on SBN–ORD | 2,790 | 65.5% | 99 min | 3.87% | C− |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 4794 quarter by quarter
OO 4794 did not run the same all year. Its best quarter was Apr–Jun 2026 at 78.8% on time and its weakest Jan–Mar 2026 at 60.7%, a swing of 18 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 flights73.3%
- Oct–Dec 202591 flights71.3%
- Jan–Mar 202690 flights60.7%
- Apr–Jun 202656 flights78.8%
- Jul–Sep 202662 flights66.7%
Scale runs 50% to 85%.
By weekday, OO 4794 did best on Sunday at 76.1% on time and worst on Tuesday at 60.0%. Each day rests on about 47 flights, so a gap of 16 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 4794 runs when it is late
The 99 late arrivals split 32 under half an hour, 25 between 30 and 60 minutes, and 42 an hour or more.
- 15+ min early62 flights19.5%
- Within 15 min157 flights49.4%
- 15–29 min late32 flights10.1%
- 30–59 min late25 flights7.9%
- 1–2 hours late16 flights5.0%
- 2+ hours late26 flights8.2%
Scale runs 0% to 100%.
Share of 318 completed flights by arrival against schedule.
Time lost at the gate mostly stays lost. Of 61 departures that left 15 minutes late or more, only 6 made it up before arrival. In the other direction, 44 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 ORD.
The worst days
Worst days for OO 4794
The latest arrival of the period was on 30 November 2025, 24 hours 3 minutes behind schedule; most of its delay minutes were filed as a late-arriving aircraft. On four of the five worst days the largest share was filed as carrier-caused (crew, maintenance, fuelling, baggage).
| Date | Arrived late by | Largest filed cause |
|---|---|---|
| 30 November 2025 | 24 hours 3 minutes | Late-arriving aircraft |
| 11 July 2026 | 8 hours 8 minutes | Carrier |
| 1 December 2025 | 6 hours 42 minutes | Carrier |
| 21 August 2026 | 4 hours 42 minutes | Carrier |
| 6 July 2026 | 4 hours 35 minutes | Carrier |
Delay causes
Why OO 4794 runs late
Carrier accounts for 57% of the 9,682 delay minutes carriers reported here, and the remaining four split what is left.
- 57%Carrier
- 19%National Airspace System
- 18%Late-arriving aircraft
- 7%Extreme weather
The largest share of delay minutes, 57%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 5,488 of the 9,682 delay minutes reported here. The split is drawn from 9,682 delay minutes reported on OO 4794.
Cancellations run at 3.04%, against 1.89% 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
13.2% 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 ORD to GSP (24) and ORD to COU (11), but none flew often enough under OO 4794 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to SBN to ORD only.
One caution: this is a thin sample. 329 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 4794
For a booking, the cancellation rate is the figure to plan around on OO 4794: 3.04% of its 329 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.
Related
Where to go next
- SBN to ORD, every carrier and departure
- ORD to SBN, the return direction
- SkyWest Airlines 5231 on the same route70.3%
- SkyWest Airlines 5723 on the same route76.6%
- SkyWest Airlines 5675 on the same route51.2%
- SkyWest Airlines 5489 on the same route61.2%
- 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.