Best Time to Fly MDW to ROC: On-Time Stats by Hour & Airline
Chicago Midway International → Frederick Douglass Grtr Rochester International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 66.5% of Chicago (MDW) to Rochester (ROC) flights arrived on time (496 scheduled flights). That is 11.1 points below the national average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Wednesday was the most reliable day (74% on time) and March the worst month (51%).
The cancellation rate was 2.0% (US average 1.8%).
MDW to ROC 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 |
|---|---|---|---|---|
| Southwest Airlines | 66.5% | 57 min | 2.0% | 496 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MDW to ROC
On-time arrival % by scheduled departure hour (local time), 638 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 10am–11am | Limited data | 8 | |
| 11am–12pm | Limited data | 23 | |
| 12pm–1pm | 76.4% | 0.0% | 72 |
| 1pm–2pm | 64.0% | 1.1% | 90 |
| 2pm–3pm | 79.6% | 0.0% | 54 |
| 3pm–4pm | 88.2% | 0.0% | 34 |
| 4pm–5pm | 83.3% | 2.3% | 43 |
| 5pm–6pm | Limited data | 23 | |
| 6pm–7pm | 63.3% | 2.8% | 217 |
| 7pm–8pm | 43.9% | 3.4% | 59 |
| 8pm–9pm | Limited data | 15 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on MDW to ROC
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 | 6 | ||
| Christmas & New Year (Dec 20 - Jan 3) | Limited data | 15 | ||
| Summer peak (Jun 15 - Aug 15) | 60.2% | -11.7 pts | 2.8% | 176 |
| All other days | 72.0% | — | 1.1% | 441 |
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).