Southwest Airlines is the most reliable airline on the STL to SAN route with a 77% on-time rate. Based on 1,795 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: STL to SAN
St. Louis to San Diego — airline reliability comparison
On-Time Rate by Airline
Southwest Airlines77%
STL to SAN Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 77% | 0.3% | 50m | 1,795 |
Route Overview
76%
Overall On-Time
50m
Avg Delay
0.3%
Cancel Rate
1,795
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.