Flight profile · SkyWest Airlines
OO5021
Chicago (ORD) to Sioux City (SUX) · scheduled 9:05 PM – 10:40 PM
How OO5021 performs
650 operations, 2024-01-09 to 2026-06-30.
OO5021 arrived on time 64.9% of the time, against 68.0% for all ORD → SUX flights — this specific departure is 3.2 percentage points worse than the route as a whole. Against SkyWest Airlines’s own flights on this route it is 3.2 points worse.
Source: US DOT Bureau of Transportation Statistics · 650 operations between 2024-01-09 to 2026-06-30
Against the rest of the route
| On time | Cancelled | Median delay | Severe | Flights | |
|---|---|---|---|---|---|
| OO5021 | 64.9% | 4.15% | 1 min | 16.2% | 650 |
| SkyWest Airlines on ORD → SUX | 68.0% | 3.30% | 0 min | 13.6% | 1,092 |
| All ORD → SUX flights | 68.0% | 3.30% | 0 min | 13.6% | 1,092 |
Source: FlyerIntel analysis of US DOT BTS data · 2024-01-09 to 2026-06-30
Other routes OO5021 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 |
|---|---|---|---|
| SUX→DEN Sioux City to Denver | 2026-06-01 – 2026-06-22 | 13 | — |
| SUX→ORD Sioux City to Chicago | 2026-03-05 – 2026-04-29 | 56 | — |
| DEN→COD Denver to Cody | 2025-09-25 – 2026-02-11 | 68 | — |
| GCC→DEN Gillette to Denver | 2025-11-27 – 2025-11-27 | 1 | — |
| RHI→ORD Rhinelander to Chicago | 2025-08-19 – 2025-09-08 | 19 | — |
| ORD→SLN Chicago to Salina | 2025-01-07 – 2025-02-12 | 37 | — |
| DEC→ORD Decatur to Chicago | 2024-08-19 – 2024-09-25 | 38 | — |
| DEN→SLN Denver to Salina | 2024-04-01 – 2024-05-22 | 52 | — |
| DEN→PRC Denver to Prescott | 2023-09-05 – 2024-01-08 | 124 | 87.8% |
| CNY→DEN Moab to Denver | 2023-08-01 – 2023-09-04 | 35 | — |
Because the same number has served different journeys, the statistics above describe only the route OO5021 currently operates. Blending them would produce an average of two different flights.
Data and methodology
Calculated by FlyerIntel from 650 records of OO5021 operating ORD → SUX, 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.