Rochester (ROC) to Chicago (ORD): On-Time Performance
Data through July 2026
Rochester (ROC) to Chicago (ORD) effectively runs on two schedules. In September 2024, 88% of arrivals were on time; in December 2025 that fell to 63% — a 25-point seasonal swing. Across the full period the route averages 76% on-time against a national 78%. Morning departures also hold up better than evening ones (84% vs 58%), which matters most in the rough months.
- On-time
- 76%
- arrived <15 min late
- Avg delay
- 19 min
- completed flights
- Cancelled
- 1.7%
- Flights/day
- 6.5
- last 12 months
- Duration
- 2h 8m
- scheduled
- Distance
- 528 mi
Best airline from ROC to ORD
4 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Republic Airwaysmost reliable | 82% | 15 min | 2.0% | 1,046 |
| Envoy Air | 79% | 16 min | 1.5% | 1,859 |
| United Airlines | 71% | 22 min | 1.1% | 1,233 |
| SkyWest Airlines | 64% | 45 min | 4.2% | 312 |
Monthly on-time trend
Best time to fly from ROC to ORD
Aim for departures around 5 a.m. (93% on-time); avoid 5 p.m. departures (57%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 78% | 19 min |
| Tuesdaybest | 79% | 19 min |
| Wednesday | 75% | 18 min |
| Thursday | 77% | 20 min |
| Friday | 75% | 20 min |
| Saturday | 78% | 17 min |
| Sunday | 73% | 22 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft35%
- Airline operations24%
- National airspace system37%
- Weather4%
Frequently asked questions
- How often are flights from ROC to ORD delayed?
- 24% of ROC–ORD flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 19 minutes.
- Which airline is most reliable from ROC to ORD?
- Republic Airways has the best on-time record on this route at 82%, based on 1,046 flights. 4 airlines flew ROC–ORD frequently enough to compare in this period.
- What is the best time of day to fly from ROC to ORD?
- Departures around 5 a.m. have the best record (93% on-time), while departures around 5 p.m. have the worst (57%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from ROC to ORD?
- The scheduled ROC–ORD flight time averages 2h 8m over 528 miles. Actual arrival times vary — flights on this route land 15+ minutes late 24% of the time.
- How often are ROC to ORD flights cancelled?
- 1.7% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, slightly above the national rate of 1.6%.
- What is the worst month to fly from ROC to ORD?
- December 2025 was the roughest month in this dataset, with only 63% of arrivals on time. The best was September 2024 at 88%. If your dates are flexible, that 25-point gap is worth planning around.
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Based on 4,450 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.