Flight profile · SkyWest Airlines
OO5231
South Bend (SBN) to Chicago (ORD) · scheduled 7:30 AM – 7:48 AM
How OO5231 performs
457 operations, 2025-03-30 to 2026-06-30.
Source: US DOT Bureau of Transportation Statistics · 457 operations between 2025-03-30 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| OO5231 | 73.3% | 1.53% | 0 min | 11.1% | 457 |
| SkyWest Airlines on SBN → ORD | 73.1% | 2.67% | -4 min | 12.2% | 6,697 |
| All SBN → ORD flights | 73.1% | 2.67% | -4 min | 12.1% | 6,746 |
Source: FlyerIntel analysis of US DOT BTS data · 2025-03-30 to 2026-06-30
Other routes OO5231 has flown
A flight number is a slot in a schedule, and carriers reassign it. These are the other city pairs this number served in the analysis period.
| Route | Operated | Flights | On time |
|---|---|---|---|
| XNA→ORD Fayetteville/Springdale/Rogers to Chicago | 2024-05-23 – 2025-03-29 | 267 | 90.6% |
| SDF→ORD Louisville to Chicago | 2025-01-07 – 2025-02-12 | 37 | — |
| ORD→SBN Chicago to South Bend | 2023-07-01 – 2024-05-22 | 323 | 86.1% |
Because the same number has served different journeys, the statistics above describe only the route OO5231 currently operates. Blending them would produce an average of two different flights.
Why OO5231 runs late
Where US DOT attributed the delay minutes on this flight.
crew, maintenance, boarding, fuelling — within the carrier’s control
weather severe enough to stop this flight specifically
airspace and airport capacity, including weather-driven flow control
the inbound aircraft was late, so this flight started late
Share of the delay minutes US DOT attributed to each cause for OO5231 on SBN → ORD. A single late flight can carry more than one cause, and only delays of fifteen minutes or more are attributed at all.
Other departures on SBN → ORD
Same airports, same journey — and not the same odds of arriving on time.
| Flight | Airline | On time | Median arrival | Operations |
|---|---|---|---|---|
| OO5723 | SkyWest Airlines | 87.4% | 17 min early | 897 |
| OO5605 | SkyWest Airlines | 77.2% | 3 min early | 635 |
| OO5489 | SkyWest Airlines | 72.3% | 2 min early | 1,046 |
Every departure listed carries at least 600 operations, so the comparison is between figures that mean something. Schedules change; confirm the departure still operates before booking around this.
Data and methodology
Calculated by FlyerIntel from 457 records of OO5231 operating SBN → ORD, published by the US DOT Bureau of Transportation Statistics. A flight counts as delayed when it arrives 15 or more minutes after schedule. Cancelled and diverted flights are excluded from the on-time rate and reported separately. Flight numbers are resolved as carrier plus number plus route, because the same number serves different routes over time.
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