Carrier route record

F9MIA→CVG

Frontier Airlines · Miami to Cincinnati

Flights: 102
Period: September 2025 to August 2026
Share of route: 10%
Carriers: 5

Historical statistics for September 2025 to August 2026, not live status. For today’s flights, check with Frontier Airlines.

Frontier on MIA to CVG draws a C. About one flight in three arrives at least 15 minutes late, and the typical late arrival is a little over an hour behind schedule. Build slack into anything you connect to. That rests on 102 flights, with a median arrival 3 minutes early.

The national on-time rate over the same period is 77.3%, so Frontier on MIA to CVG runs 10 points behind the country as a whole. Across a thousand flights that is about 96 extra late arrivals.

On time

67.7%

Arrivals under 15 minutes late, of 99 completed flights

Avg delay

82 min

Across delayed arrivals only, not all flights

Cancelled

2.94%

National rate is 1.89%

Whole route

81.4%

Every carrier on MIA to CVG, 989 flights

These figures cover 102 flights between September 2025 and August 2026. Beyond the headline rate, 15.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally.

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Carrier by carrier

Frontier against every carrier on MIA to CVG

Frontier flew 102 of the 989 flights on MIA to CVG, about 10% of it. Its 67.7% on time is 14 points worse than the route as a whole, which runs 81.4%. 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.

On-time performance by carrier on MIA to CVG
Airline	Flights	On time	Avg delay	Cancelled	Grade
Delta Air Linesthin sample	1	100.0%	—	0.00%	A+
Envoy Air	805	83.5%	44 min	0.62%	B+
American Airlinesthin sample	76	78.7%	102 min	1.32%	B
Frontier Airlines (this page)thin sample	102	67.7%	82 min	2.94%	C
Republic Airwaysthin sample	5	60.0%	60 min	0.00%	D+

Timetable by Aviasales, a Travelpayouts partner. Booking through it may earn this site a commission at no cost to you; it changes no figure here.

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 102 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 67.7% is the reliable figure here.

Across the year

Frontier on MIA to CVG through the year

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 67.7% on time across 102 flights.

Split by quarter, Frontier on MIA to CVG logged 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 67.7% annual figure is the one to use.

Delay causes

Why Frontier runs late on this route

Late-arriving aircraft accounts for 65% of the 2,614 delay minutes carriers reported here, and the remaining four split what is left.

Late-arriving aircraft
65%
Carrier
19%
National Airspace System
16%
Extreme weather
1%

65% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 2,614 reported delay minutes here, that single category outweighs weather by 65 to one. The split is drawn from 2,614 reported delay minutes.

Cancellations run at 2.94%, against 1.89% nationally. That is roughly one flight in 30 cancelled outright. A cancelled flight is invisible in every on-time figure on this page, so the punctuality numbers above describe only the flights that actually operated.

Connections and stage length

What a delay here costs

15.2% of arrivals land a full hour or more behind schedule, against 8.3% nationally. Ninety minutes is the honest minimum for a connection 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.

The return leg is a different operation and performs like one: it runs 72.4% on time across 101 flights, 5 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 5 points of difference.

One caution: this is a thin sample. 102 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: the delay figures matter less here than the 2.94% cancellation rate. A late arrival costs you a little over an hour; a cancelled flight costs you the day. Book the earliest departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 99 completed flights over 12 months sit behind that.

Where to go next

Source: US DOT Bureau of Transportation Statistics, on-time performance data, September 2025 to August 2026. Last updated 22 October 2026; recomputed monthly. How this data is collected.

Key figures