Carrier performance at one airport
AA→MIA
American Airlines at Miami International
- Departures
- 63,838
- Period
- June 2025 to May 2026
- Routes
- 25
- Rank here
- #6 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, 6 points worse than the national rate of 77.4%. The late ones land a little over an hour behind schedule. That rests on 63,838 flights, of which Envoy Air flew 13,572 at 82.7% on time.
Measured against the airport rather than the country, American Airlines runs 2 points behind the 73.4% 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.
Key figures
On time
71.6%
62,518 completed departures
Avg delay
73 min
Across delayed flights only
Cancelled
1.69%
At MIA, this carrier only
Rank here
#6
Of 9 carriers clearing the floor at MIA
These figures cover 64,000 flights between June 2025 and May 2026. Beyond the headline rate, 10.8% 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.
Against the competition
Every carrier at MIA, ranked
The choice of carrier is not cosmetic here. Envoy Air arrives on time 82.7% of the time; Spirit Airlines manages 66.2%. Sample sizes sit next to every figure, because a two-point gap across 3,864 flights means less than a ten-point one.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Envoy Air | 13,572 | 82.7% | 49 min | 0.95% | B+ |
| United Airlines | 6,812 | 77.8% | 84 min | 1.01% | B |
| Frontier Airlines | 4,250 | 74.3% | 86 min | 2.21% | C |
| Delta Air Lines | 11,630 | 72.8% | 82 min | 2.10% | C |
| Southwest Airlines | 5,287 | 72.6% | 60 min | 1.19% | C |
| American Airlines (this page) | 63,838 | 71.6% | 73 min | 1.69% | C |
| Alaska Airlines | 533 | 68.7% | 57 min | 1.50% | C |
| Republic Airways | 1,145 | 67.3% | 95 min | 1.31% | C |
| Spirit Airlines | 3,864 | 66.2% | 79 min | 4.35% | C− |
Spirit Airlines cancels 4.3% 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.
| Route | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| MIA to DFW · Dallas-Fort Worth | 4,296 | 73.2% | 81 min | 2.70% | C |
| MIA to LGA · New York | 3,546 | 66.9% | 80 min | 3.67% | C− |
| MIA to DCA · Washington | 3,545 | 74.6% | 70 min | 2.45% | C |
| MIA to CLT · Charlotte | 3,248 | 76.9% | 75 min | 1.57% | B |
| MIA to ORD · Chicago | 3,019 | 71.4% | 70 min | 1.69% | C |
| MIA to MCO · Orlando | 3,002 | 69.4% | 73 min | 1.17% | C |
| MIA to LAX · Los Angeles | 2,754 | 74.0% | 70 min | 0.47% | C+ |
| MIA to JFK · New York | 2,655 | 70.5% | 78 min | 2.98% | C |
| MIA to TPA · Tampa | 2,580 | 68.8% | 81 min | 0.85% | C+ |
| MIA to PHL · Philadelphia | 2,489 | 75.8% | 80 min | 1.89% | B |
| MIA to BOS · Boston | 2,212 | 70.8% | 72 min | 1.90% | C |
| MIA to SJU · San Juan | 2,048 | 76.2% | 72 min | 0.63% | B+ |
| MIA to PHX · Phoenix | 1,834 | 77.9% | 64 min | 0.76% | B+ |
| MIA to RDU · Raleigh | 1,726 | 71.0% | 71 min | 1.51% | C |
| MIA to ATL · Atlanta | 1,545 | 67.4% | 83 min | 1.04% | C |
| MIA to AUS · Austin | 1,510 | 74.4% | 74 min | 1.39% | C |
| MIA to IAH · Houston | 1,508 | 69.6% | 74 min | 1.46% | C |
| MIA to EWR · Newark | 1,420 | 68.7% | 74 min | 3.24% | C− |
| MIA to MSY · New Orleans | 1,321 | 71.2% | 63 min | 1.51% | C |
| MIA to LAS · Las Vegas | 1,308 | 73.4% | 66 min | 0.99% | C+ |
| MIA to BNA · Nashville | 1,302 | 66.2% | 78 min | 1.38% | C |
| MIA to SFO · San Francisco | 1,073 | 73.6% | 63 min | 0.93% | C+ |
| MIA to CHS · Charleston | 949 | 67.5% | 80 min | 1.16% | C |
| MIA to STT · Charlotte Amalie | 941 | 76.5% | 49 min | 0.74% | B+ |
| MIA to DEN · Denver | 884 | 75.2% | 64 min | 0.90% | B+ |
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 17 points between the best and worst carrier. Each bar is the on-time rate for flights scheduled inside that window.
- 5am–8am6,319 flights89.5%
- 8am–11am11,031 flights85.3%
- 11am–2pm5,320 flights72.3%
- 2pm–5pm10,324 flights65.0%
- 5pm–8pm12,141 flights63.7%
- 8pm–5am18,703 flights65.7%
Scale runs 55% to 95%. Rows with fewer than 30 flights show a dash.
The 5pm–8pm window is where this operation falls apart: 63.7% on time, against 89.5% 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.
Across the year
Seasonal pattern
July is the worst month at 59.1% on time, 17 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.
Delay causes
What holds this operation up
- 41%Late-arriving aircraft
- 35%Carrier
- 18%National Airspace System
- 5%Extreme weather
- 0%Security
41% 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 1.30 million reported delay minutes here, that single category outweighs weather by 8 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.
Cancellations sit at 1.69% against a national 1.80%, which is ordinary. Diversions add another 0.37%.
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 10.8% of arrivals land a full hour or more behind schedule, against 8.2% nationally. A 45-minute layover does not survive that, and no amount of walking quickly changes it. Ninety minutes is the honest minimum here, and two hours if the onward flight is on a separate ticket.
63,838 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 59.1%, a swing of 17 points. If the dates move at all, move them out of July before you think about anything else.
Common questions
American Airlines at MIA
How often is American Airlines at MIA delayed?
Roughly one flight in four arrive at least 15 minutes late, which is the Department of Transportation's definition of a delayed arrival. That works out to 28.4% of the 63,838 flights in this analysis, against 22.6% 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 82.7% on time across 13,572 flights. Spirit Airlines is at the other end on 66.2%, a gap of 17 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 89.5% on time. The 5pm–8pm window is the weakest at 63.7%, 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 59.1% on time, compared with 76.6% in December. Across the year that is 17 points between the best and worst months. Moving flexible dates out of that month is one of the few things that reliably helps.
Related
Where to go next
Source: US DOT Bureau of Transportation Statistics, on-time performance data, June 2025 to May 2026. Updated monthly. How this data is collected.