Best Time to Fly CMH to MIA: On-Time Stats by Hour & Airline
John Glenn Columbus International → Miami International
Data through July 2026 · Last updated October 18, 2026
1,154 flights were scheduled from Columbus (CMH) to Miami (MIA) in the last 12 months, and 83.5% of those that flew arrived on time, 5.9 points above the US average of 77.6%.
Among 3 airlines, American Airlines led with 87.5% on time and Southwest Airlines was last with 79.9%.
Over 24 months, Tuesday was the most reliable day (87% on time) and December the worst month (74%).
The cancellation rate was 0.3% (US average 1.8%).
CMH to MIA 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 |
|---|---|---|---|---|
| American Airlines | 87.5% | 112 min | 2.4% | 41 |
| Envoy Air | 84.0% | 67 min | 0.1% | 950 |
| Southwest Airlines | 79.9% | 46 min | 1.2% | 161 |
| Republic Airways | Limited data | 2 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly CMH to MIA
On-time arrival % by scheduled departure hour (local time), 2,178 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 94.5% | 0.0% | 91 |
| 6am–7am | 89.4% | 0.3% | 656 |
| 7am–8am | 89.8% | 0.0% | 167 |
| 8am–9am | 85.2% | 0.8% | 238 |
| 9am–10am | Limited data | 28 | |
| 10am–11am | 88.0% | 0.0% | 76 |
| 11am–12pm | 80.2% | 2.0% | 98 |
| 12pm–1pm | 73.5% | 0.8% | 123 |
| 1pm–2pm | 70.0% | 0.0% | 60 |
| 2pm–3pm | Limited data | 14 | |
| 3pm–4pm | Limited data | 13 | |
| 5pm–6pm | 64.2% | 0.0% | 274 |
| 6pm–7pm | 82.6% | 0.7% | 290 |
| 7pm–8pm | 63.3% | 2.0% | 50 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on CMH to MIA
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) | 84.4% | +0.7 pts | 0.0% | 45 |
| Christmas & New Year (Dec 20 - Jan 3) | 71.6% | -12.1 pts | 0.0% | 109 |
| Summer peak (Jun 15 - Aug 15) | 79.8% | -3.9 pts | 0.3% | 364 |
| All other days | 83.7% | — | 0.5% | 1,660 |
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).