Southwest Airlines is the most reliable airline on the STL to MCI route with a 78% on-time rate. Based on 3,806 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: STL to MCI
St. Louis to Kansas City — airline reliability comparison
On-Time Rate by Airline
Southwest Airlines78%
STL to MCI Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 78% | 0.7% | 52m | 3,806 |
Route Overview
78%
Overall On-Time
52m
Avg Delay
0.7%
Cancel Rate
3,806
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.