Atlanta to Miami — airline reliability comparison
is the most reliable airline on the ATL to MIA route with a 80% on-time rate, compared to Frontier Airlines at 60%. Based on 597 flights tracked.
This route involves high-congestion airports, which can affect reliability regardless of airline.
Source: Bureau of Transportation Statistics. Updated October 2026.| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| MQBest | 80% | 1.0% | 73m | 597 |
| American AirlinesAA | 76% | 1.3% | 100m | 6,081 |
| Southwest AirlinesWN | 75% | 0.7% | 50m | 1,639 |
| Delta Air LinesDL | 72% | 1.1% | 61m | 11,540 |
| Spirit AirlinesNK | 71% | 1.7% | 77m | 1,125 |
| Frontier AirlinesF9Worst | 60% | 2.1% | 92m | 2,403 |
Delays, TSA, weather, gates — we'll let you know if something matters.
Data last updated October 2026. Source: Bureau of Transportation Statistics.