Southwest Airlines is the most reliable airline on the MCI to STL route with a 87% on-time rate. Based on 3,799 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: MCI to STL
Kansas City to St. Louis — airline reliability comparison
On-Time Rate by Airline
Southwest Airlines87%
MCI to STL Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 87% | 0.9% | 50m | 3,799 |
Route Overview
87%
Overall On-Time
50m
Avg Delay
0.9%
Cancel Rate
3,799
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.