is the most reliable airline on the MIA to STL route with a 83% on-time rate, compared to American Airlines at 71%. Based on 359 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: MIA to STL
Miami to St. Louis — airline reliability comparison
On-Time Rate by Airline
83%
Southwest Airlines71%
American Airlines71%
MIA to STL Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| MQBest | 83% | 0.2% | 43m | 359 |
| Southwest AirlinesWN | 71% | 0.5% | 60m | 1,433 |
| American AirlinesAAWorst | 71% | 0.8% | 74m | 1,701 |
Route Overview
73%
Overall On-Time
68m
Avg Delay
0.7%
Cancel Rate
3,546
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.