Cheap flights from Saint Louis to San Francisco
Cheapest current fares: $140 in September 2026, 2,786 km direct flight in ~3h 17m.
Cheapest month-by-month fares
Lowest available fare per calendar month from Saint Louis (STL) to San Francisco (SFO). Refreshed daily.
Saint Louis (STL) → San Francisco (SFO)
- September 2026 $140
Frequently asked questions
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What is the cheapest month to fly from Saint Louis to San Francisco?
Based on current 6-month forward fare data, September 2026 is the cheapest month to fly from Saint Louis (STL) to San Francisco (SFO), with fares starting from $140.
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What is the lowest current fare from STL to SFO?
The lowest currently-listed fare from Saint Louis (STL) to San Francisco (SFO) is $140 on 2026-09-18.
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How long is the flight from Saint Louis to San Francisco?
Direct flights from STL to SFO cover approximately 2,786 km (1,731 miles), with an estimated flight time of 3h 17m. Operating airlines: UA, WN.
Related guides for this route
Sibling pages — full route detail, airport overviews, visa context, per-airline routes.