Columbus (CMH) to Miami (MIA): On-Time Performance
Data through May 2026
Columbus (CMH) to Miami (MIA) effectively runs on two schedules. In October 2024, 95% of arrivals were on time; in December 2025 that fell to 69% — a 26-point seasonal swing. Across the full period the route averages 82% on-time against a national 78%. Morning departures also hold up better than evening ones (87% vs 71%), which matters most in the rough months.
- On-time
- 82%
- arrived <15 min late
- Avg delay
- 13 min
- completed flights
- Cancelled
- 0.7%
- Flights/day
- 3.0
- last 12 months
- Duration
- 2h 44m
- scheduled
- Distance
- 990 mi
Best airline from CMH to MIA
3 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| American Airlinesmost reliable | 84% | 12 min | 1.4% | 143 |
| Southwest Airlines | 81% | 13 min | 0.8% | 238 |
| Envoy Air | 81% | 13 min | 0.6% | 1,681 |
Monthly on-time trend
Best time to fly from CMH to MIA
Aim for departures around 5 a.m. (90% on-time); avoid 5 p.m. departures (64%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 81% | 16 min |
| Tuesdaybest | 86% | 11 min |
| Wednesday | 83% | 12 min |
| Thursday | 79% | 12 min |
| Fridaybest | 86% | 11 min |
| Saturday | 80% | 12 min |
| Sunday | 76% | 17 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft42%
- Airline operations29%
- National airspace system24%
- Weather6%
Frequently asked questions
- How often are flights from CMH to MIA delayed?
- 19% of CMH–MIA flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 13 minutes.
- Which airline is most reliable from CMH to MIA?
- American Airlines has the best on-time record on this route at 84%, based on 143 flights. 3 airlines flew CMH–MIA frequently enough to compare in this period.
- What is the best time of day to fly from CMH to MIA?
- Departures around 5 a.m. have the best record (90% on-time), while departures around 5 p.m. have the worst (64%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from CMH to MIA?
- The scheduled CMH–MIA flight time averages 2h 44m over 990 miles. Actual arrival times vary — flights on this route land 15+ minutes late 19% of the time.
- How often are CMH to MIA flights cancelled?
- 0.7% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from CMH to MIA?
- December 2025 was the roughest month in this dataset, with only 69% of arrivals on time. The best was October 2024 at 95%. If your dates are flexible, that 26-point gap is worth planning around.
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Based on 2,075 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.