Best Time to Fly ORD to RST: On-Time Stats by Hour & Airline
Chicago O'Hare International → Rochester International
Data through July 2026 · Last updated October 18, 2026
1,057 flights were scheduled from Chicago (ORD) to Rochester (RST) in the last 12 months, and 65.2% of those that flew arrived on time, 12.5 points below the US average of 77.6%.
Among 2 airlines, Envoy Air led with 74.5% on time and SkyWest Airlines was last with 54.0%.
Over 24 months, Tuesday was the most reliable day (73% on time) and December the worst month (50%).
The cancellation rate was 4.8% (US average 1.8%).
ORD to RST 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 |
|---|---|---|---|---|
| Envoy Air | 74.5% | 51 min | 4.7% | 578 |
| SkyWest Airlines | 54.0% | 120 min | 5.0% | 479 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly ORD to RST
On-time arrival % by scheduled departure hour (local time), 1,626 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | 74.0% | 2.0% | 51 |
| 9am–10am | 75.7% | 2.8% | 217 |
| 10am–11am | 78.8% | 0.0% | 165 |
| 11am–12pm | 86.0% | 2.0% | 51 |
| 12pm–1pm | 56.2% | 0.0% | 32 |
| 1pm–2pm | 80.3% | 0.0% | 76 |
| 2pm–3pm | 66.7% | 0.0% | 36 |
| 3pm–4pm | 50.9% | 5.2% | 58 |
| 4pm–5pm | 64.6% | 2.7% | 401 |
| 5pm–6pm | Limited data | 22 | |
| 6pm–7pm | Limited data | 2 | |
| 7pm–8pm | Limited data | 20 | |
| 8pm–9pm | 76.2% | 0.8% | 128 |
| 9pm–10pm | 45.7% | 5.4% | 37 |
| 10pm–11pm | 55.8% | 8.8% | 296 |
| 11pm–12am | 54.8% | 8.8% | 34 |
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 RST
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 | 20 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 59.5% | -10.0 pts | 11.9% | 42 |
| Summer peak (Jun 15 - Aug 15) | 61.6% | -7.8 pts | 3.6% | 336 |
| All other days | 69.4% | — | 2.7% | 1,228 |
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).