Flight profile · SkyWest Airlines
OO5140
Chicago (ORD) to Hancock (CMX) · scheduled 9:25 PM – 11:59 PM
How OO5140 performs
1,045 operations, 2023-07-01 to 2026-06-30.
OO5140 arrived on time 66.4% of the time, against 69.6% for all ORD → CMX flights — this specific departure is 3.1 percentage points worse than the route as a whole. Against SkyWest Airlines’s own flights on this route it is 3.1 points worse.
Source: US DOT Bureau of Transportation Statistics · 1,045 operations between 2023-07-01 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| OO5140 | 66.4% | 4.98% | -1 min | 17.1% | 1,045 |
| SkyWest Airlines on ORD → CMX | 69.6% | 4.79% | -3 min | 14.9% | 2,256 |
| All ORD → CMX flights | 69.6% | 4.79% | -3 min | 14.9% | 2,256 |
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30
By day of week
Does OO5140 run worse on particular days?
Sunday is historically the most reliable day and Friday the least, a gap of 7.1 percentage points.
Source: FlyerIntel analysis of US DOT BTS data · 2023-07-01 to 2026-06-30 · Days with fewer than 120 operations are not scored.
Other routes OO5140 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 |
|---|---|---|---|
| GRB→CMX Green Bay to Hancock | 2026-03-04 – 2026-03-04 | 1 | — |
| DEC→ORD Decatur to Chicago | 2025-05-01 – 2025-05-21 | 21 | — |
| DEN→BFF Denver to Scottsbluff | 2025-03-06 – 2025-03-29 | 18 | — |
Because the same number has served different journeys, the statistics above describe only the route OO5140 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 1,045 records of OO5140 operating ORD → CMX, 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.