Carrier route record

F9MIA→CLT

Frontier Airlines · Miami to Charlotte

Flights: 213
Period: July 2025 to June 2026
Share of route: 6%
Carriers: 3

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

Frontier on MIA to CLT earns an A. More than four flights in five arrive inside the 15-minute window the DOT uses to define an on-time arrival, which puts it 8 points better than the national rate of 77.6%. When something does go wrong the average delay runs an hour and a half. That rests on 213 flights, with a median arrival 14 minutes early.

Set against the rest of the country, Frontier's MIA to CLT record is 8 points better than the US average of 77.6%. That gap is worth roughly 79 fewer late arrivals for every thousand flights.

On time

85.5%

Arrivals under 15 minutes late, of 207 completed flights

Avg delay

94 min

Across delayed arrivals only, not all flights

Cancelled

2.82%

National rate is 1.81%

Whole route

78.1%

Every carrier on MIA to CLT, 3,726 flights

These figures cover 213 flights between July 2025 and June 2026. The median arrival is 14 minutes early, which is the part an average hides: most flights here are fine, and the on-time rate is decided by a tail of badly late ones. On-time means under 15 minutes late, the DOT's own threshold.

Carrier by carrier

Frontier against every carrier on MIA to CLT

Frontier flew 213 of the 3,726 flights on MIA to CLT, about 6% of it. Its 85.5% on time is 7 points better than the route as a whole, which runs 78.1%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from Frontier at 85.5% to American at 77.6%. One 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 CLT
Airline	Flights	On time	Avg delay	Cancelled	Grade
Frontier Airlines (this page)thin sample	213	85.5%	94 min	2.82%	A
Spirit Airlinesthin sample	264	79.1%	77 min	3.79%	B−
American Airlines	3,249	77.6%	73 min	1.45%	B

Departure window

When Frontier runs best on this route

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 17 points, against half a point between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.

5am–8am62 flights95.1%
8am–11am32 flights93.3%
11am–2pm23 flights—
2pm–5pm70 flights77.9%
5pm–8pm16 flights—
8pm–5am10 flights—

Scale runs 70% to 100%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 95.1% of the time, against 77.9% for the afternoon window. That is 17 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 2pm–5pm window is the busiest, with 70 flights scheduled in it.

Across the year

Frontier on MIA to CLT through the year

Jul–Sep 202545 flights90.7%
Oct–Dec 202547 flights80.4%
Jan–Mar 202651 flights87.8%
Apr–Jun 202670 flights84.1%

Scale runs 70% to 95%. 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 85.5% on time across 213 flights.

Frontier on MIA to CLT did not run the same all year. Its best quarter was Jul–Sep 2025 at 90.7% on time and its weakest Oct–Dec 2025 at 80.4%, a swing of 10 points on roughly 53 flights a quarter. The twelve-month rate averages over that, so if you are flying in a weak quarter the quarter's own figure is the better guide.

Across the week, Thursday is the strongest day at 95.2% on time and Sunday the weakest at 76.2%. 19 points is a smaller lever than departure hour, but it is free.

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 2,815 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.

Late-arriving aircraft
67%
National Airspace System
17%
Carrier
16%

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 2,815 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 2,815 reported delay minutes.

The practical consequence: the 5am–8am departure is the one that starts clean. Its aircraft has no earlier leg to be late from, which is exactly why that window shows 95.1% on time here.

Cancellations run at 2.82%, against 1.81% nationally. That is roughly one flight in 40 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

Badly late arrivals are rare here: only 4.3% land an hour or more behind schedule, against 8.1% nationally. Connections built on this flight are about as safe as US domestic connections get, though a cancelled flight still ignores every layover you give it.

The 650 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 70.6% on time across 211 flights, 15 points below 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 15 points of difference.

One caution: this is a thin sample. 213 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 CLT

Put together: the delay figures matter less here than the 2.82% cancellation rate. A late arrival costs you an hour and a half; a cancelled flight costs you the day. Book the 5am–8am departure so there is still a schedule behind you if it goes wrong, and treat a same-day connection as optimistic. 207 completed flights over 12 months sit behind that.

Where to go next

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.

Key figures