Carrier route record

AACLT→MIA

American Airlines · Charlotte to Miami

Flights: 3,244
Period: July 2025 to June 2026
Share of route: 87%
Carriers: 3

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

American on CLT to MIA lands a B, about a point worse than the national rate of 77.6%. About one flight in four arrives 15 minutes late or worse, and those flights are late by a little over an hour on average. That is a workable record, not a spotless one. That rests on 3,244 flights, with a median arrival 6 minutes early.

The US average over the same twelve months is 77.6%, so there is little to separate American on CLT to MIA from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.

On time

76.5%

Arrivals under 15 minutes late, of 3,186 completed flights

Avg delay

79 min

Across delayed arrivals only, not all flights

Cancelled

1.45%

National rate is 1.81%

Whole route

75.9%

Every carrier on CLT to MIA, 3,720 flights

These figures cover 3,244 flights between July 2025 and June 2026. Beyond the headline rate, 8.1% 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

American against every carrier on CLT to MIA

American flew 3,244 of the 3,720 flights on CLT to MIA, most of the route. Its 76.5% on time is about level with the route as a whole at 75.9%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from American at 76.5% to Frontier at 70.6%. Two 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 CLT to MIA
Airline	Flights	On time	Avg delay	Cancelled	Grade
American Airlines (this page)	3,244	76.5%	79 min	1.45%	B
Spirit Airlinesthin sample	265	71.6%	64 min	5.28%	C−
Frontier Airlinesthin sample	211	70.6%	139 min	4.74%	C−

Departure window

When American runs best on this route

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 23 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–8am815 flights87.6%
8am–11am514 flights85.5%
11am–2pm552 flights79.0%
2pm–5pm377 flights67.5%
5pm–8pm374 flights64.7%
8pm–5am612 flights64.6%

Scale runs 55% to 95%. Rows with fewer than 30 flights show a dash.

The 8pm–5am window is where this operation falls apart: 64.6% on time, against 87.6% for the 5am–8am slot. By evening the aircraft flying these rotations have absorbed a full day of small delays and there is no slack left to recover in. The 5am–8am window is the busiest, with 815 flights scheduled in it.

Across the year

American on CLT to MIA through the year

Darker means more delays. Figures are on-time percentages.September best, July worst

July is the worst month at 60.6% on time, 24 points below September, the best at 84.6%. Summer afternoon convection and peak-season schedules land on the same weeks every year, so this is a pattern you can book around rather than a run of bad luck. December was the busiest month here, with 301 flights.

Across the week, Tuesday is the strongest day at 83.3% on time and Sunday the weakest at 68.1%. 15 points is a smaller lever than departure hour, but it is free.

Delay causes

Why American runs late on this route

Carriers report a reason for every delay minute they cause, in five DOT categories. The split below is by minutes, not by number of flights, so a handful of very long weather delays weighs as much as many short ones. It covers 59,000 reported delay minutes.

Late-arriving aircraft
39%
Carrier
38%
National Airspace System
14%
Extreme weather
9%
Security
0%

39% 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 59,000 reported delay minutes here, that single category outweighs weather by 5 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 58,782 reported delay minutes.

The largest share of delay minutes, 38%, falls under carrier control: crew scheduling, maintenance, fuelling, baggage. Unlike weather, that is a management outcome, and it is the category where the gap between two carriers on the same schedule is genuinely earned. It accounts for 22,000 of the 59,000 delay minutes reported here.

Cancellations sit at 1.45% against a national 1.81%, which is ordinary. Diversions add another 0.34%.

Connections and stage length

What a delay here costs

8.1% of arrivals land an hour or more late, close to the national 8.1%. That is the figure that decides a connection, and it says a 60 to 75 minute layover is reasonable here while anything under 45 minutes is a bet. Most delays on this route last a little over an hour, which a normal layover absorbs.

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 runs 77.6% on time across 3,249 flights, within about a point of this direction. The two legs are scored separately because they usually differ; on this city pair they happen not to.

The sample behind these figures is 3,244 flights, enough that the headline rate is stable to within roughly a point. The hour-block and month splits divide that further, so read the thinner bars with more caution than the headline.

What to do with this

Booking American on CLT to MIA

Put together: the calendar is the biggest lever here, not the carrier or the hour. September runs 84.6% on time and July 60.6%, a swing of 24 points. If the dates move at all, move them out of July before you think about anything else. 3,186 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