Carrier route record
AAMIA→AUS
American Airlines · Miami to Austin
- Flights
- 1,523
- Period
- July 2025 to June 2026
- Share of route
- 70%
- Carriers
- 5
Historical statistics for July 2025 to June 2026, not live status. For today’s flights, check with American Airlines.
American on MIA to AUS sits in the middle of the pack with a C. Close to three flights in four arrive on time by the DOT's definition, 4 points worse than the national rate of 77.6%. The late ones land a little over an hour behind schedule. That rests on 1,523 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 MIA to AUS from the country as a whole. The variation that matters here is internal: which carrier, and what time of day.
Key figures
On time
73.8%
Arrivals under 15 minutes late, of 1,499 completed flights
Avg delay
76 min
Across delayed arrivals only, not all flights
Cancelled
1.31%
National rate is 1.81%
Whole route
72.8%
Every carrier on MIA to AUS, 2,161 flights
These figures cover 1,523 flights between July 2025 and June 2026. Beyond the headline rate, 9.1% 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 MIA to AUS
American flew 1,523 of the 2,161 flights on MIA to AUS, most of the route. Its 73.8% on time is about level with the route as a whole at 72.8%. Ranked by on-time rate it is number two of five carriers on the route, where the range runs from Frontier at 82.6% to Delta at 69.1%. Four 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.
| Airline | Flights | On time | Avg delay | Cancelled | Grade |
|---|---|---|---|---|---|
| Frontier Airlinesthin sample | 46 | 82.6% | 97 min | 0.00% | B+ |
| American Airlines (this page) | 1,523 | 73.8% | 76 min | 1.31% | C |
| Envoy Airthin sample | 22 | 72.7% | 47 min | 0.00% | C+ |
| Southwest Airlinesthin sample | 348 | 69.2% | 48 min | 0.29% | C+ |
| Delta Air Linesthin sample | 222 | 69.1% | 94 min | 0.90% | C+ |
Flight by flight
American flight numbers on MIA to AUS
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 25 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–8am90 flights91.0%
- 8am–11am292 flights88.5%
- 11am–2pm103 flights71.3%
- 2pm–5pm352 flights66.0%
- 5pm–8pm355 flights71.7%
- 8pm–5am331 flights67.6%
Scale runs 60% to 95%. Rows with fewer than 30 flights show a dash.
Book the early departure. Flights leaving between 5am–8am arrive on time 91.0% of the time, against 66.0% for the afternoon window. That is 25 points of difference for no extra money, and it comes from the same aircraft having had no earlier flight to fall behind on. The 5pm–8pm window is the busiest, with 355 flights scheduled in it.
Across the year
American on MIA to AUS through the year
July is the worst month at 64.6% on time, 19 points below February, the best at 83.1%. 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. March was the busiest month here, with 155 flights.
Across the week, Tuesday is the strongest day at 82.7% on time and Sunday the weakest at 65.3%. 17 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 30,000 reported delay minutes.
- 41%Carrier
- 37%Late-arriving aircraft
- 15%National Airspace System
- 7%Extreme weather
- 0%Security
37% 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 30,000 reported delay minutes here, that single category outweighs weather by 6 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 29,919 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 12,000 of the 30,000 delay minutes reported here.
Cancellations sit at 1.31% against a national 1.81%, which is ordinary. Diversions add another 0.26%.
Connections and stage length
What a delay here costs
For anyone connecting, the number to weigh is not the on-time rate but the tail behind it. 9.1% of arrivals land a full hour or more behind schedule, against 8.1% 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.
The 1,103 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 79.8% on time across 1,522 flights, 6 points above 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 6 points of difference.
The sample behind these figures is 1,523 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 MIA to AUS
Put together: the calendar is the biggest lever here, not the carrier or the hour. February runs 83.1% on time and July 64.6%, a swing of 19 points. If the dates move at all, move them out of July before you think about anything else. 1,499 completed flights over 12 months sit behind that.
Related
Where to go next
- MIA to AUS, every carrier
- American on AUS to MIA, the return leg
- Southwest Airlines on MIA to AUS69.2%
- Delta Air Lines on MIA to AUS69.1%
- American Airlines network-wide record
- Miami International (MIA) delay statistics
- Austin-Bergstrom International (AUS) delay statistics
- Why the first flight of the morning is statistically safest
- The best time of day to fly, according to 7.04 million flight records
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.