Flight Check

Best Airline: SFO to STL

San Francisco to St. Louis — airline reliability comparison

United Airlines is the most reliable airline on the SFO to STL route with a 79% on-time rate, compared to Southwest Airlines at 60%. Based on 609 flights tracked.

This route involves high-congestion airports, which can affect reliability regardless of airline.

Source: Bureau of Transportation Statistics. Updated October 2026.

On-Time Rate by Airline

United Airlines79%
SkyWest Airlines78%
Southwest Airlines60%

SFO to STL Airline Comparison

AirlineOn-Time %Cancel %Avg DelayFlights
United AirlinesUABest79%0.4%54m609
SkyWest AirlinesOO78%1.8%102m269
Southwest AirlinesWNWorst60%0.3%54m841

Route Overview

70%
Overall On-Time
60m
Avg Delay
0.7%
Cancel Rate
1,734
Total Flights
SFO to STL Route DetailsReturn: STL to SFO
SFO AirportSTL Airport

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Data last updated October 2026. Source: Bureau of Transportation Statistics.