Carrier route record

AAPHL→MIA

American Airlines · Philadelphia to Miami

Flights: 2,569
Period: July 2025 to June 2026
Share of route: 81%
Carriers: 3

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

American on PHL to MIA lands a B, about a point better than the national rate of 77.6%. About one flight in five arrives 15 minutes late or worse, and those flights are late by an hour and a half on average. That is a workable record, not a spotless one. That rests on 2,569 flights, with a median arrival 9 minutes early.

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

On time

78.8%

Arrivals under 15 minutes late, of 2,511 completed flights

Avg delay

87 min

Across delayed arrivals only, not all flights

Cancelled

1.99%

National rate is 1.81%

Whole route

77.2%

Every carrier on PHL to MIA, 3,158 flights

These figures cover 2,569 flights between July 2025 and June 2026. Beyond the headline rate, 8.3% 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 PHL to MIA

American flew 2,569 of the 3,158 flights on PHL to MIA, most of the route. Its 78.8% on time is 2 points better than the route as a whole, which runs 77.2%. Ranked by on-time rate it is first of three carriers on the route, where the range runs from American at 78.8% to Frontier at 66.6%. 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 PHL to MIA
Airline	Flights	On time	Avg delay	Cancelled	Grade
American Airlines (this page)	2,569	78.8%	87 min	1.99%	B
Spirit Airlinesthin sample	235	76.2%	55 min	2.98%	B
Frontier Airlinesthin sample	354	66.6%	83 min	1.98%	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 16 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–8am522 flights87.9%
8am–11am625 flights81.5%
11am–2pm357 flights72.7%
2pm–5pm381 flights76.5%
5pm–8pm542 flights71.9%
8pm–5am142 flights80.9%

Scale runs 65% to 95%. Rows with fewer than 30 flights show a dash.

Book the early departure. Flights leaving between 5am–8am arrive on time 87.9% of the time, against 71.9% for the evening window. That is 16 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 8am–11am window is the busiest, with 625 flights scheduled in it.

Across the year

American on PHL to MIA through the year

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

July is the worst month at 59.0% on time, 27 points below May, the best at 86.4%. 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. June was the busiest month here, with 261 flights.

Across the week, Tuesday is the strongest day at 86.3% on time and Saturday the weakest at 71.8%. 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 46,000 reported delay minutes.

Carrier
41%
Late-arriving aircraft
36%
National Airspace System
18%
Extreme weather
5%
Security
0%

36% 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 46,000 reported delay minutes here, that single category outweighs weather by 7 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 46,223 reported delay minutes.

The largest share of delay minutes, 41%, 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 19,000 of the 46,000 delay minutes reported here.

Cancellations sit at 1.99% against a national 1.81%, which is ordinary. Diversions add another 0.27%.

Connections and stage length

What a delay here costs

8.3% 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 an hour and a half, which a normal layover absorbs.

The 1,013 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 76.4% on time across 2,569 flights, within 2 points 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 2,569 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 PHL to MIA

Put together: the calendar is the biggest lever here, not the carrier or the hour. May runs 86.4% on time and July 59.0%, a swing of 27 points. If the dates move at all, move them out of July before you think about anything else. 2,511 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