Carrier performance at one airport

AA→MIA

American Airlines at Miami International

Departures: 64,336
Period: September 2025 to August 2026
Routes: 25
Rank here: #5 of 9

American Airlines at Miami sits in the middle of the pack with a C. About seven flights in ten arrive on time by the DOT's definition, 5 points worse than the national rate of 77.3%. The late ones land a little over an hour behind schedule. That rests on 64,336 flights, of which Envoy Air flew 14,383 at 83.0% on time.

Measured against the airport rather than the country, American Airlines runs 2 points behind the 74.2% weighted average across all carriers at MIA. That is the comparison worth making: every operator here works the same runways, the same airspace and the same weather.

On time

72.5%

63,035 completed departures

Avg delay

73 min

Across delayed flights only

Cancelled

1.61%

At MIA, this carrier only

Rank here

Of 9 carriers clearing the floor at MIA

These figures cover 64,000 flights between September 2025 and August 2026. Beyond the headline rate, 10.4% of arrivals land a full hour or more behind schedule, against 8.3% nationally.

Against the competition

Every carrier at MIA, ranked

The choice of carrier is not cosmetic here. Envoy Air arrives on time 83.0% of the time; Spirit Airlines manages 65.3%. Sample sizes sit next to every figure, because a two-point gap across 2,803 flights means less than a ten-point one.

On-time performance of all carriers departing MIA
Airline	Flights	On time	Avg delay	Cancelled	Grade
Envoy Air	14,383	83.0%	50 min	0.82%	B+
United Airlines	6,757	78.7%	84 min	1.11%	B
Delta Air Lines	11,676	74.7%	78 min	2.21%	C
Frontier Airlines	4,358	73.7%	85 min	2.36%	C
American Airlines (this page)	64,336	72.5%	73 min	1.61%	C
Alaska Airlines	533	72.4%	55 min	1.31%	C
Southwest Airlines	5,373	69.7%	57 min	1.17%	C
Republic Airways	909	69.4%	91 min	1.54%	C
Spirit Airlines	2,803	65.3%	75 min	5.35%	C−

Spirit Airlines cancels 5.3% of what it schedules here, the highest in the table. A cancelled flight never appears in an on-time rate, so read that column alongside the punctuality one rather than after it.

Route by route

Where American Airlines flies from MIA

American Airlines operates 25 routes out of MIA with enough volume to report. Route records inside one carrier at one airport still spread widely, because a short shuttle and a transcontinental have very different exposure to a late inbound.

American Airlines routes from MIA
Route	Flights	On time	Avg delay	Cancelled	Grade
MIA to DFW · Dallas-Fort Worth	4,305	75.5%	79 min	2.35%	B
MIA to LGA · New York	3,570	65.3%	83 min	3.70%	C−
MIA to DCA · Washington	3,555	75.7%	69 min	2.22%	B
MIA to CLT · Charlotte	3,271	78.5%	71 min	1.35%	B
MIA to ORD · Chicago	3,044	72.5%	77 min	1.74%	C
MIA to MCO · Orlando	2,977	70.3%	76 min	1.14%	C
MIA to LAX · Los Angeles	2,757	74.8%	68 min	0.51%	C+
MIA to PHL · Philadelphia	2,727	76.1%	76 min	3.19%	B−
MIA to JFK · New York	2,692	70.6%	78 min	2.93%	C
MIA to TPA · Tampa	2,518	70.1%	80 min	0.68%	C+
MIA to BOS · Boston	2,271	71.1%	70 min	1.67%	C
MIA to SJU · San Juan	2,140	78.2%	68 min	0.51%	B+
MIA to PHX · Phoenix	1,826	79.8%	71 min	0.82%	B+
MIA to RDU · Raleigh	1,662	72.1%	72 min	1.44%	C
MIA to IAH · Houston	1,566	71.5%	69 min	1.15%	C
MIA to ATL · Atlanta	1,552	68.0%	85 min	0.64%	C+
MIA to AUS · Austin	1,551	73.9%	72 min	1.03%	C
MIA to EWR · Newark	1,428	68.4%	72 min	3.29%	C−
MIA to BNA · Nashville	1,330	66.6%	70 min	1.20%	C
MIA to MSY · New Orleans	1,295	74.1%	63 min	1.08%	C
MIA to LAS · Las Vegas	1,248	73.6%	62 min	0.72%	C+
MIA to SFO · San Francisco	1,137	69.2%	65 min	0.88%	C+
MIA to STT · Charlotte Amalie	941	78.2%	53 min	0.43%	B+
MIA to DEN · Denver	889	76.1%	58 min	0.90%	B+
MIA to CHS · Charleston	884	66.3%	82 min	1.13%	C

Flight by flight

American Airlines flight numbers from MIA

13 American Airlines flight numbers leaving MIA flew their main route often enough to have a record of their own. Grouped by destination.

Departure window

Best time of day for this operation

Departure time matters more here than the choice of carrier. The gap between the best and worst window is 26 points, against 18 points between the best and worst carrier.

5am–8am6,611 flights90.1%
8am–11am11,312 flights85.7%
11am–2pm5,527 flights73.7%
2pm–5pm10,238 flights67.1%
5pm–8pm12,210 flights64.1%
8pm–5am18,438 flights66.2%

Scale runs 55% to 95%.

The 5pm–8pm window is where this operation falls apart: 64.1% on time, against 90.1% 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 8pm–5am window is the busiest, with 18,438 flights scheduled in it.

Across the year

Seasonal pattern

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

July is the worst month at 60.7% on time, 16 points below December, the best at 76.6%. 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. January was the busiest month here, with 5,917 flights.

Delay causes

What holds this operation up

Late-arriving aircraft
41%
Carrier
34%
National Airspace System
18%
Extreme weather
7%
Security
0%

41% of delay minutes trace back to a late-arriving aircraft, meaning the plane was already behind before it got here. Across 1.26 million reported delay minutes here, that single category outweighs weather by 6 to one. The split is drawn from 1,256,919 reported delay minutes.

Cancellations sit at 1.61% against a national 1.89%, which is ordinary. Diversions add another 0.42%.

10.4% 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.

64,336 flights sit behind these numbers, which is a large enough sample that the headline rate is not moving on noise. Where a sub-group falls below 30 flights the site shows a dash instead of a percentage.

Put together: the calendar is the biggest lever here, not the carrier or the hour. December runs 76.6% on time and July 60.7%, a swing of 16 points. If the dates move at all, move them out of July before you think about anything else. 63,035 completed flights over 12 months sit behind that.

Common questions

American Airlines at MIA

How often is American Airlines at MIA delayed?

Roughly one flight in four arrives at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 27.5% of the 64,336 flights in this analysis, against 22.7% nationally. Delayed flights are late by a little over an hour on average.

Which airline is most reliable on American Airlines at MIA?

Envoy Air leads at 83.0% on time across 14,383 flights. Spirit Airlines is at the other end on 65.3%, a gap of 18 points. Sample size matters as much as the percentage: a rate built from a few hundred flights moves around far more than one built from ten thousand.

What time of day has the fewest delays on American Airlines at MIA?

The 5am–8am departure window is the strongest at 90.1% on time. The 5pm–8pm window is the weakest at 64.1%, 26 points behind. Later departures inherit delays from earlier flights the same aircraft has already flown, which is why the curve slopes the way it does.

How bad are July delays on American Airlines at MIA?

July is the weakest month at 60.7% on time, compared with 76.6% in December. Across the year that is 16 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.

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