Best Time to Fly RAP to ORD: On-Time Stats by Hour & Airline
Rapid City Regional → Chicago O'Hare International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 72.9% of Rapid City (RAP) to Chicago (ORD) flights arrived on time (692 scheduled flights). That is 4.7 points below the national average of 77.6%.
Among 3 airlines, United Airlines led with 73.5% on time and SkyWest Airlines was last with 71.8%.
Over 24 months, Tuesday was the most reliable day (78% on time) and August the worst month (66%).
The cancellation rate was 1.7% (US average 1.8%).
RAP to ORD 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 | 73.5% | 118 min | 1.7% | 175 |
| Envoy Air | 73.5% | 83 min | 1.5% | 270 |
| SkyWest Airlines | 71.8% | 82 min | 2.0% | 247 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly RAP to ORD
On-time arrival % by scheduled departure hour (local time), 1,261 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 6am–7am | 80.3% | 2.5% | 198 |
| 7am–8am | Limited data | 1 | |
| 8am–9am | Limited data | 1 | |
| 9am–10am | 57.1% | 7.5% | 53 |
| 11am–12pm | 78.9% | 1.1% | 92 |
| 12pm–1pm | 69.8% | 0.0% | 234 |
| 1pm–2pm | 77.2% | 0.6% | 467 |
| 2pm–3pm | 72.5% | 0.0% | 40 |
| 3pm–4pm | 78.4% | 2.6% | 76 |
| 4pm–5pm | Limited data | 1 | |
| 5pm–6pm | Limited data | 2 | |
| 6pm–7pm | 51.6% | 2.1% | 96 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on RAP to ORD
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) | 80.0% | +2.2 pts | 0.0% | 30 |
| Summer peak (Jun 15 - Aug 15) | 66.9% | -10.9 pts | 0.9% | 466 |
| All other days | 77.8% | — | 1.6% | 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).