Best Time to Fly MIA to AUS: On-Time Stats by Hour & Airline
Miami International → Austin - Bergstrom International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 71.8% of Miami (MIA) to Austin (AUS) flights arrived on time (2,192 scheduled flights). That is 5.8 points below the national average of 77.6%.
Among 4 airlines, Frontier Airlines led with 78.4% on time and Southwest Airlines was last with 67.4%.
Over 24 months, Tuesday was the most reliable day (82% on time) and July the worst month (62%).
The cancellation rate was 1.0% (US average 1.8%).
MIA to AUS 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 |
|---|---|---|---|---|
| Frontier Airlines | 78.4% | 97 min | 0.0% | 37 |
| American Airlines | 73.2% | 75 min | 1.2% | 1,536 |
| Delta Air Lines | 67.7% | 87 min | 0.8% | 253 |
| Southwest Airlines | 67.4% | 52 min | 0.3% | 348 |
| Envoy Air | Limited data | 18 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MIA to AUS
On-time arrival % by scheduled departure hour (local time), 4,028 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | Limited data | 1 | |
| 6am–7am | Limited data | 6 | |
| 7am–8am | 92.1% | 0.7% | 141 |
| 8am–9am | 90.4% | 1.5% | 585 |
| 9am–10am | 86.9% | 0.0% | 153 |
| 10am–11am | Limited data | 7 | |
| 11am–12pm | 65.3% | 0.0% | 49 |
| 12pm–1pm | 68.0% | 1.0% | 203 |
| 1pm–2pm | 74.6% | 0.0% | 202 |
| 2pm–3pm | 70.4% | 1.1% | 353 |
| 3pm–4pm | 69.7% | 0.2% | 457 |
| 4pm–5pm | 71.8% | 1.2% | 86 |
| 5pm–6pm | 54.0% | 1.4% | 140 |
| 6pm–7pm | 69.5% | 0.8% | 393 |
| 7pm–8pm | 70.4% | 1.6% | 559 |
| 8pm–9pm | Limited data | 1 | |
| 9pm–10pm | 73.8% | 0.8% | 503 |
| 10pm–11pm | 61.2% | 3.2% | 189 |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on MIA to AUS
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) | 66.7% | -9.6 pts | 0.0% | 75 |
| Christmas & New Year (Dec 20 - Jan 3) | 73.7% | -2.6 pts | 0.0% | 156 |
| Summer peak (Jun 15 - Aug 15) | 65.3% | -11.0 pts | 1.5% | 732 |
| All other days | 76.3% | — | 1.0% | 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).