Route Price Intelligence
Cheap Flights From St. Louis to San Juan
Live pricing benchmarks, monthly patterns, and historical lows for this route.
San Juan for close to $200 is one of the better fares we have tracked out of St. Louis, usually this route runs around $356 round trip on American. This fare sits just above the all time low of $171, so it is one of the cheapest windows we have seen, and San Juan's beaches and Old Town make for an easy fall or winter escape.
✓ 8 date combinations found at this price
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Best Time to Fly from St. Louis to San Juan
The cheapest time to fly from St. Louis to San Juan is typically October, when fares average around $356. The most expensive month tends to be July at around $546. For the best deals, consider flying in October, November, January.
Typical Price by Travel Month
Median round-trip fare for each month, with the typical price range, from our ongoing tracking of this route