CMH to MIA flight delays & on-time performance
Nonstop flights from John Glenn Columbus International Airport to Miami International Airport · 990 miles · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at CMH or MIA right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
Key facts
- Flights from Columbus (CMH) to Miami (MIA) arrived on time 84% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 0.3% were cancelled, and 6% arrived an hour or more late.
- Envoy Air was the most punctual airline here (84% on time); Southwest Airlines was the least (80%).
- Departures scheduled around 5am did best (94% on time); around 5pm did worst (64%).
- Wednesday was the most reliable day to fly (85% on time) and Sunday the least (80%).
- The largest source of delay minutes was late-arriving aircraft (43%).
Which airline is most on time from CMH to MIA?
Ranked by on-time arrival rate. Regional airlines fly under their partner's brand (e.g. SkyWest for Delta Connection or United Express).
| Airline | On time | Cancelled | Avg delay | 1 hr+ late | Flights |
|---|---|---|---|---|---|
| Republic AirwaysRegional airline operating flights for American Eagle, Delta Connection and United Express. | 100% | 0.0% | 4 min | 0.0% | 2 |
| American Airlines | 88% | 2.4% | 15 min | 7.5% | 41 |
| Envoy AirRegional airline operating American Eagle flights. | 84% | 0.1% | 12 min | 6.3% | 950 |
| Southwest Airlines | 80% | 1.2% | 11 min | 3.1% | 161 |
Best time of day to fly
On-time arrival rate by scheduled departure hour (local time).
- 5am94%78 flights
- 6am91%296 flights
- 7am90%128 flights
- 8am81%110 flights
- 10am89%44 flights
- 11am83%82 flights
- 12pm79%29 flights
- 1pm72%57 flights
- 5pm64%132 flights
- 6pm84%189 flights
Best day of the week
On-time arrival rate by day of departure.
- Monday84%1.2% cancelled
- Tuesday85%0.0% cancelled
- Wednesday85%0.0% cancelled
- Thursday85%0.0% cancelled
- Friday84%0.0% cancelled
- Saturday82%0.0% cancelled
- Sunday80%1.1% cancelled
On-time trend by month
Why flights are late
Share of delay minutes by cause, as reported by airlines to the DOT.
- Late-arriving aircraft43%
- Airline (crew, maintenance, cleaning, fueling)26%
- Air traffic control & airport congestion25%
- Extreme weather6%
- Security0%
Why flights are cancelled
Share of cancellations by reason.
- Extreme weather75%
- Air traffic control & airport congestion25%
- Airline (crew, maintenance, cleaning, fueling)0%
- Security0%
CMH to MIA: common questions
- How often are CMH to MIA flights on time?
- 84% of flights arrived less than 15 minutes late in Aug 2025 – Jul 2026, compared with 78% for all US flights.
- How often are flights from Columbus to Miami cancelled?
- 0.3% of scheduled flights were cancelled (4 of 1,154).
- How long are typical delays?
- Across all flights the average arrival delay was 12 min (early arrivals count as zero). Flights that were late arrived 65 min behind schedule on average, and 5.9% of flights were an hour or more late.
- How long is taxi time at CMH?
- Flights on this route spent 16 min taxiing from the gate to takeoff on average.
Related routes
Return trip: MIA to CMH — 78% on time
More flights from Columbus
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. Route: CMH → MIA, nonstop flights by US airlines that report to the DOT. How we calculate this.