Cheap Flights from San Francisco to St Louis
No deal from San Francisco to St Louis has cleared our price bar yet. What we have seen on the route is below.
Across 4 months of observations from San Francisco to St Louis, the lowest round-trip fare we recorded was $189, in September. The typical fare was $292. September was the cheapest month we saw and July the dearest.
The most recent price we saw on this route was $287 on Frontier, seen Oct 17. It is an unverified observation and may have changed.
See every deal <a href="/from/san-francisco">from San Francisco</a>, <a href="/to/st-louis">to St Louis</a>, or the return direction <a href="/from/st-louis/to/san-francisco">St Louis to San Francisco</a>.
Latest price we saw: San Francisco to St Louis
The most recent round-trip fare our sweep found on this route. It is not verified and may have changed since the date shown.
| From | Price | Per mile | Travel dates | Airline | Seen | Check price |
|---|---|---|---|---|---|---|
| San Francisco (SFO) to St Louis (STL) | $287 | 8.3¢ | Jan 1 – Jan 9 | Frontier | Oct 17 | Check price |
Price history: San Francisco to St Louis
What we observed by month, from our signals database. Unverified observations, not bookable prices.
| Month | Low | Typical | Sightings |
|---|---|---|---|
| Oct 2026 | $259 | $309 | 16 |
| Sep 2026 | $189 | $283 | 35 |
| Aug 2026 | $240 | $304 | 85 |
| Jul 2026 | $274 | $274 | 1 |
Frequently asked questions
How many flight deals from San Francisco to St Louis are on Sparkflights right now?
There are 0 verified deals from San Francisco to St Louis on the board right now. The list refreshes hourly.
What is the lowest price ever seen from San Francisco to St Louis?
The lowest fare we've recorded from San Francisco to St Louis is $189, based on 137 price observations over 4 months.
How much does a flight from San Francisco to St Louis cost?
The typical round-trip fare we observed from San Francisco to St Louis is $292, against a recorded low of $189. These are observations, not quotes.
When is the cheapest month to fly San Francisco to St Louis?
September was the cheapest month we observed from San Francisco to St Louis and July the dearest, over 4 months of data.
What is the current price from San Francisco to St Louis?
The most recent fare our sweep saw from San Francisco to St Louis is $287, on Oct 17. It is an unverified observation rather than a verified deal, so check it before booking.