Southwest Airlines is the most reliable airline on the MDW to MIA route with a 78% on-time rate, compared to Frontier Airlines at 67%. Based on 2,112 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: MDW to MIA
Chicago to Miami — airline reliability comparison
On-Time Rate by Airline
Southwest Airlines78%
Frontier Airlines67%
MDW to MIA Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 78% | 1.0% | 56m | 2,112 |
| Frontier AirlinesF9Worst | 67% | 3.1% | 102m | 660 |
Route Overview
75%
Overall On-Time
73m
Avg Delay
1.7%
Cancel Rate
2,817
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.