Route Price Intelligence
Cheap Flights From St. Louis to San Francisco
Live pricing benchmarks, monthly patterns, and historical lows for this route.
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.
✓ 6 date combinations found at this price
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Best Time to Fly from St. Louis to San Francisco
The cheapest time to fly from St. Louis to San Francisco is typically January, when fares average around $263. The most expensive month tends to be April at around $491. For the best deals, consider flying in January, February, December.
Typical Price by Travel Month
Median round-trip fare for each month, with the typical price range, from our ongoing tracking of this route
Planning San Francisco?
Best months to go, what a day on the ground costs, and the tours worth booking.
Read the San Francisco guide →