Best Time to Fly AUS to MIA: On-Time Stats by Hour & Airline
Austin - Bergstrom International → Miami International
Data through July 2026 · Last updated October 18, 2026
2,192 flights were scheduled from Austin (AUS) to Miami (MIA) in the last 12 months, and 78.7% of those that flew arrived on time, 1.1 points above the US average of 77.6%.
Among 4 airlines, Delta Air Lines led with 89.6% on time and Southwest Airlines was last with 65.6%.
Over 24 months, Tuesday was the most reliable day (85% on time) and August the worst month (68%).
The cancellation rate was 1.1% (US average 1.8%).
AUS to MIA on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Lines | 89.6% | 77 min | 1.2% | 252 |
| American Airlines | 79.9% | 81 min | 1.2% | 1,535 |
| Frontier Airlines | 75.7% | 83 min | 0.0% | 37 |
| Southwest Airlines | 65.6% | 46 min | 0.9% | 349 |
| Spirit Airlines | Limited data | 1 | ||
| Envoy Air | Limited data | 18 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly AUS to MIA
On-time arrival % by scheduled departure hour (local time), 4,029 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 92.2% | 1.6% | 728 |
| 6am–7am | 86.1% | 5.3% | 38 |
| 7am–8am | 84.8% | 1.2% | 648 |
| 8am–9am | 89.1% | 1.4% | 215 |
| 9am–10am | 88.8% | 0.0% | 144 |
| 10am–11am | 78.0% | 1.2% | 322 |
| 11am–12pm | 79.8% | 1.1% | 462 |
| 12pm–1pm | 75.0% | 0.0% | 325 |
| 1pm–2pm | 68.3% | 0.6% | 160 |
| 2pm–3pm | 58.5% | 1.9% | 54 |
| 3pm–4pm | 57.4% | 0.0% | 137 |
| 4pm–5pm | 74.7% | 1.2% | 84 |
| 5pm–6pm | 73.1% | 1.4% | 351 |
| 6pm–7pm | 61.4% | 2.3% | 346 |
| 7pm–8pm | Limited data | 13 | |
| 9pm–10pm | Limited data | 2 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on AUS to MIA
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 85.3% | +3.9 pts | 0.0% | 75 |
| Christmas & New Year (Dec 20 - Jan 3) | 75.8% | -5.7 pts | 0.0% | 157 |
| Summer peak (Jun 15 - Aug 15) | 70.8% | -10.6 pts | 1.6% | 732 |
| All other days | 81.5% | — | 1.2% | 3,065 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).