Austin (AUS) to Miami (MIA): On-Time Performance
Data through May 2026
The calendar drives reliability on AUS–MIA. September 2024 flights landed on schedule 90% of the time, but August 2025 dropped to 65% — a gap of 25 points. Across the full period the route averages 79% on-time against a national 78%. Morning departures also hold up better than evening ones (86% vs 67%), which matters most in the rough months.
- On-time
- 79%
- arrived <15 min late
- Avg delay
- 19 min
- completed flights
- Cancelled
- 1.5%
- Flights/day
- 5.8
- last 12 months
- Duration
- 2h 47m
- scheduled
- Distance
- 1,103 mi
Best airline from AUS to MIA
3 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Linesmost reliable | 89% | 10 min | 1.6% | 191 |
| American Airlines | 81% | 19 min | 1.7% | 2,935 |
| Southwest Airlines | 71% | 17 min | 0.6% | 696 |
Monthly on-time trend
Best time to fly from AUS to MIA
Aim for departures around 5 a.m. (92% on-time); avoid 3 p.m. departures (56%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 79% | 21 min |
| Tuesdaybest | 84% | 12 min |
| Wednesday | 80% | 19 min |
| Thursday | 80% | 17 min |
| Friday | 78% | 23 min |
| Saturday | 79% | 16 min |
| Sunday | 75% | 23 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft38%
- Airline operations38%
- National airspace system18%
- Weather6%
Frequently asked questions
- How often are flights from AUS to MIA delayed?
- 21% of AUS–MIA flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 19 minutes.
- Which airline is most reliable from AUS to MIA?
- Delta Air Lines has the best on-time record on this route at 89%, based on 191 flights. 3 airlines flew AUS–MIA frequently enough to compare in this period.
- What is the best time of day to fly from AUS to MIA?
- Departures around 5 a.m. have the best record (92% on-time), while departures around 3 p.m. have the worst (56%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from AUS to MIA?
- The scheduled AUS–MIA flight time averages 2h 47m over 1,103 miles. Actual arrival times vary — flights on this route land 15+ minutes late 21% of the time.
- How often are AUS to MIA flights cancelled?
- 1.5% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from AUS to MIA?
- August 2025 was the roughest month in this dataset, with only 65% of arrivals on time. The best was September 2024 at 90%. If your dates are flexible, that 25-point gap is worth planning around.
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Based on 3,925 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.