Deal found on November 6, 2026
St. Louis to San Francisco
$165$42661% off
Round trip
Frontier's nonstop STL to San Francisco fare is just $165 round trip, usually $299 to $469 on this route. Six separate date combinations are open across December, January, and February, giving you flexibility to time it with San Francisco's mild winter weather, cable cars, and food scene.
Travel dates
January into February
e.g. Jan 27 – Feb 5 · 9 nights
Date options
6 at this price
Lowest we've seen
$160
Search these dates on Google FlightsSee San Francisco price historySan Francisco guide: weather, costs & things to do
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