Best Time to Fly ORD to RAP: On-Time Stats by Hour & Airline
Chicago O'Hare International → Rapid City Regional
Data through July 2026 · Last updated October 18, 2026
692 flights were scheduled from Chicago (ORD) to Rapid City (RAP) in the last 12 months, and 78.5% of those that flew arrived on time, 0.9 points above the US average of 77.6%.
Among 3 airlines, United Airlines led with 87.2% on time and SkyWest Airlines was last with 65.7%.
Over 24 months, Saturday was the most reliable day (82% on time) and December the worst month (57%).
The cancellation rate was 2.2% (US average 1.8%).
ORD to RAP on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| United Airlines | 87.2% | 61 min | 1.1% | 174 |
| Envoy Air | 84.3% | 48 min | 0.7% | 270 |
| SkyWest Airlines | 65.7% | 51 min | 4.4% | 248 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly ORD to RAP
On-time arrival % by scheduled departure hour (local time), 1,261 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | 86.2% | 0.3% | 345 |
| 9am–10am | 84.2% | 0.3% | 300 |
| 10am–11am | 73.6% | 0.0% | 91 |
| 11am–12pm | 82.5% | 1.7% | 58 |
| 12pm–1pm | 85.0% | 0.0% | 40 |
| 1pm–2pm | 87.8% | 0.0% | 75 |
| 2pm–3pm | Limited data | 4 | |
| 4pm–5pm | 68.7% | 1.0% | 100 |
| 7pm–8pm | 64.7% | 3.4% | 89 |
| 8pm–9pm | 55.1% | 10.1% | 99 |
| 9pm–10pm | 62.5% | 6.7% | 60 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on ORD to RAP
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | Limited data | 14 | ||
| Christmas & New Year (Dec 20 - Jan 3) | Limited data | 30 | ||
| Summer peak (Jun 15 - Aug 15) | 73.2% | -9.5 pts | 1.3% | 466 |
| All other days | 82.7% | — | 1.9% | 751 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).