Flight number record
OO 5274
SkyWest Airlines · Chicago to South Bend
- Route
- ORD → SBN
- Departs
- 21:20
- Flights
- 333
- Period
- September 2025 to August 2026
Historical statistics for September 2025 to August 2026, not live status. For today’s OO 5274, 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 5274 draws a C−. About one flight in three arrives at least 15 minutes late, and the typical late arrival is an hour and a half behind schedule. Build slack into anything you connect to. That rests on 333 flights, with a median arrival 4 minutes late.
The national on-time rate over the same period is 77.3%, so OO 5274 runs 10 points behind the country as a whole. Across a thousand flights that is about 103 extra late arrivals.
Key figures
On time
67.0%
Arrivals under 15 minutes late, of 315 completed flights
Avg delay
93 min
Across delayed arrivals only, not all flights
Cancelled
5.41%
National rate is 1.89%
1 hour+ late
13.7%
National rate is 8.3%
These figures cover 333 flights between September 2025 and August 2026. Beyond the headline rate, 13.7% of arrivals land a full hour or more behind schedule, against 8.3% nationally.
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Schedule
When OO 5274 flies
OO 5274 flies ORD to SBN without a single fixed slot. Its most common scheduled departure was 21:20, used on 124 of 333 flights, with 21:25 (85 flights) and 21:30 (73 flights) next.
- Departs 21:20124 flights37.2%
- Departs 21:2585 flights25.5%
- Departs 21:3073 flights21.9%
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 21:20 departure sits in the 8pm–5am window. Across every US flight scheduled in that window the on-time rate is 70.1%, and OO 5274 runs 3 points worse at 67.0%. By that time of day most aircraft have flown several legs already, and whatever went wrong earlier is still in the schedule.
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Against the route
OO 5274 next to ORD to SBN
Every carrier on ORD to SBN combined arrived on time 63.1% of the time across 2,789 flights, so OO 5274 is 4 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 63.0% on time. Across its whole network SkyWest Airlines managed 78.7%, which this flight trails by 12 points.
| Compared with | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| OO 5274thin sample | 333 | 67.0% | 93 min | 5.41% | C− |
| All SkyWest Airlines on ORD–SBN | 2,777 | 63.0% | 87 min | 4.39% | D− |
| All carriers on ORD–SBN | 2,789 | 63.1% | 87 min | 4.37% | D− |
| SkyWest Airlines, whole network | 855,406 | 78.7% | 88 min | 1.79% | B |
Across the year
OO 5274 quarter by quarter
OO 5274 did not run the same all year. Its best quarter was Jul–Sep 2025 at 83.3% on time and its weakest Jul–Sep 2026 at 50.0%, a swing of 33 points on roughly 67 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 flights83.3%
- Oct–Dec 202589 flights69.9%
- Jan–Mar 202690 flights70.6%
- Apr–Jun 202662 flights66.1%
- Jul–Sep 202662 flights50.0%
Scale runs 40% to 90%.
By weekday, OO 5274 did best on Tuesday at 78.7% on time and worst on Sunday at 48.8%. Each day rests on about 48 flights, so a gap of 30 points is worth noticing but could still narrow in another year.
Arrival by arrival
How late OO 5274 runs when it is late
The 104 late arrivals split 34 under half an hour, 27 between 30 and 60 minutes, and 43 an hour or more.
- 15+ min early57 flights18.1%
- Within 15 min154 flights48.9%
- 15–29 min late34 flights10.8%
- 30–59 min late27 flights8.6%
- 1–2 hours late24 flights7.6%
- 2+ hours late19 flights6.0%
Scale runs 0% to 100%.
Share of 315 completed flights by arrival against schedule.
16 of 96 late departures made up the time and arrived on time, 17% of them. In the other direction, 24 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 SBN.
The worst days
Worst days for OO 5274
The latest arrival of the period was on 29 December 2025, 12 hours 5 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 |
|---|---|---|
| 29 December 2025 | 12 hours 5 minutes | Late-arriving aircraft |
| 30 November 2025 | 11 hours 17 minutes | Carrier |
| 11 September 2025 | 10 hours 56 minutes | Carrier |
| 8 February 2026 | 9 hours 51 minutes | Carrier |
| 11 August 2026 | 9 hours 50 minutes | Carrier |
Delay causes
Why OO 5274 runs late
Carrier accounts for 45% of the 9,659 delay minutes carriers reported here, and the remaining four split what is left.
- 45%Carrier
- 29%Late-arriving aircraft
- 22%National Airspace System
- 4%Extreme weather
The largest share of delay minutes, 45%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. It accounts for 4,325 of the 9,659 delay minutes reported here. The split is drawn from 9,659 delay minutes reported on OO 5274.
Cancellations run at 5.41%, against 1.89% nationally. That is about one flight in twenty 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
13.7% 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 one other city pair in the data, including CRW to ORD (29), but none flew often enough under OO 5274 to report a rate for. Carriers move flight numbers between routes, so the figures on this page apply to ORD to SBN only.
One caution: this is a thin sample. 333 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 5274
For a booking, the cancellation rate is the figure to plan around on OO 5274: 5.41% of its 333 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
- ORD to SBN, every carrier and departure
- SBN to ORD, the return direction
- SkyWest Airlines 5499 on the same route58.5%
- SkyWest Airlines 5505 on the same route62.3%
- SkyWest Airlines 4791 on the same route65.6%
- SkyWest Airlines 4636 on the same route52.4%
- SkyWest Airlines 5887 on the same route66.1%
- 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.