Carrier route record
F9MIA→CVG
Frontier Airlines · Miami to Cincinnati
- Flights
- 129
- Period
- July 2025 to June 2026
- Share of route
- 13%
- Carriers
- 5
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with Frontier Airlines.
Frontier on MIA to CVG sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 9 points worse than the national rate of 77.6%. The late ones land an hour and a half behind schedule. That rests on 129 flights, with a median arrival 6 minutes early.
The national on-time rate over the same period is 77.6%, so Frontier on MIA to CVG runs 9 points behind the country as a whole. Across a thousand flights that is about 86 extra late arrivals.
Key figures
On time
69.0%
Arrivals under 15 minutes late, of 126 completed flights
Avg delay
88 min
Across delayed arrivals only, not all flights
Cancelled
2.33%
National rate is 1.81%
Whole route
77.4%
Every carrier on MIA to CVG, 998 flights
These figures cover 129 flights between July 2025 and June 2026. Beyond the headline rate, 15.1% of arrivals land a full hour or more behind schedule. That is the number that wrecks a connection, and it is not visible in an on-time percentage alone.
Carrier by carrier
Frontier against every carrier on MIA to CVG
Frontier flew 129 of the 998 flights on MIA to CVG, about 13% of it. Its 69.0% on time is 8 points worse than the route as a whole, which runs 77.4%. Ranked by on-time rate it is number four of five carriers on the route, where the range runs from Delta at 100.0% to Republic at 60.0%. Three of those carriers flew fewer than 365 flights here, so treat their positions as rough.
Only one carrier clears this site's 365-flight floor here, so there is no comparison to draw. The table below is the full picture.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Delta Air Linesthin sample | 1 | 100.0% | — | 0.00% | A+ |
| Envoy Air | 787 | 78.7% | 45 min | 0.64% | B+ |
| American Airlinesthin sample | 76 | 78.7% | 102 min | 1.32% | B |
| Frontier Airlines (this page)thin sample | 129 | 69.0% | 88 min | 2.33% | C |
| Republic Airwaysthin sample | 5 | 60.0% | 60 min | 0.00% | D+ |
Departure window
When Frontier runs best on this route
Departure time is the single lever a traveller controls, and it moves the odds more than most people expect. Each bar below is the on-time rate for flights scheduled to leave inside that window, across 129 flights.
There are not enough flights in each departure window to split Frontier's MIA to CVG record by time of day without the percentages moving on noise. The headline rate of 69.0% is the reliable figure here.
Across the year
Frontier on MIA to CVG through the year
- Jul–Sep 202527 flights—
- Oct–Dec 202518 flights—
- Jan–Mar 202664 flights65.6%
- Apr–Jun 202620 flights—
Scale runs 55% to 70%. Rows with fewer than 30 flights show a dash.
Monthly volumes are too low here to break the year into twelve reliable readings. What the twelve-month total says is 69.0% on time across 129 flights.
Split by quarter, Frontier on MIA to CVG logged 27 flights in Jul–Sep 2025, 18 flights in Oct–Dec 2025, 64 flights in Jan–Mar 2026 and 20 flights in Apr–Jun 2026. Fewer than three of those quarters carried the 30 completed flights this site needs before printing a rate, so the 69.0% annual figure is the one to use.
Delay causes
Why Frontier runs late on this route
One category carries most of the weight here. Late-arriving aircraft accounts for 67% of the 3,427 delay minutes carriers reported, and the remaining four split what is left. The split is by minutes rather than by flights, so a few very long delays count for as much as many short ones.
- 67%Late-arriving aircraft
- 18%Carrier
- 15%National Airspace System
- 1%Extreme weather
67% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. That is a cascade, and cascades start small and grow through the day. Across 3,427 reported delay minutes here, that single category outweighs weather by 67 to one. It is the strongest argument for booking the first departure of the morning, when the aircraft has been sitting at the gate overnight with nothing to inherit. The split is drawn from 3,427 reported delay minutes.
The practical consequence: the 8am–11am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 93.5% on time here.
Cancellations sit at 2.33% against a national 1.81%, which is ordinary. Diversions add another 0.00%.
Connections and stage length
What a delay here costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 15.1% of arrivals land a full hour or more behind schedule, against 8.1% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
The 948 miles between these two airports put this in the middle of the US network, around two and a half to three hours of block time. That is enough cruise to absorb a ten-minute late pushback and not enough to absorb thirty. It is also long enough that the aircraft usually flies three or four legs a day rather than six, which slows how fast delay compounds.
The return leg is a different operation and performs like one: it runs 72.8% on time across 128 flights, 4 points above this direction. Departure banks, aircraft rotations and the congestion at each end all differ, so scoring the two directions together would average away a real 4 points of difference.
One caution: this is a thin sample. 129 flights over twelve months is enough to clear this site's floor but not enough to pin the rate down tightly, and a single bad week moves it by more than a point. Treat the grade as a rough reading.
What to do with this
Booking Frontier on MIA to CVG
Put together: treat all of this as provisional. 129 flights over twelve months is enough to clear this site's floor and not enough to be confident to better than a couple of points. The 69.0% headline is the most reliable number on the page; the hour and month splits below it are built on a few dozen flights each. 126 completed flights over 12 months sit behind that.
Related
Where to go next
- MIA to CVG, every carrier
- Frontier on CVG to MIA, the return leg
- Envoy Air on MIA to CVG78.7%
- Frontier Airlines network-wide record
- Miami International (MIA) delay statistics
- Cincinnati/Northern Kentucky International (CVG) delay statistics
- Why the first flight of the morning is statistically safest
- How often a connection fails at the major US hubs
Source: US DOT Bureau of Transportation Statistics, on-time performance data, July 2025 to June 2026. Last updated 15 September 2026; recomputed monthly. How this data is collected.