Delta Air Lines is the most reliable airline on the AUS to MIA route with a 90% on-time rate, compared to at 70%. Based on 243 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: AUS to MIA
Austin to Miami — airline reliability comparison
On-Time Rate by Airline
Delta Air Lines90%
Spirit Airlines86%
Frontier Airlines83%
American Airlines80%
Southwest Airlines71%
70%
AUS to MIA Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Delta Air LinesDLBest | 90% | 1.2% | 65m | 243 |
| Spirit AirlinesNK | 86% | 9.4% | 79m | 32 |
| Frontier AirlinesF9 | 83% | 0.0% | 47m | 12 |
| American AirlinesAA | 80% | 1.4% | 88m | 4,829 |
| Southwest AirlinesWN | 71% | 0.6% | 58m | 1,274 |
| MQWorst | 70% | 0.4% | 61m | 563 |
Route Overview
78%
Overall On-Time
79m
Avg Delay
1.3%
Cancel Rate
7,052
Total Flights
Flying out of AUS? We'll brief you.
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Data last updated October 2026. Source: Bureau of Transportation Statistics.