Route Price Intelligence
Cheap Flights From St. Louis to San Juan
Live pricing benchmarks, monthly patterns, and historical lows for this route.
Typical Price
$356
Great Deal
Under $356
Typical Range
$356 – $421
Lowest We've Seen
$171
Based on 541 price pointshigh confidence
Monthly Price Guide
Jan
$356
Feb
$356
Mar
$424
Apr
$356
May
$421
Jun
—
Jul
$516
Aug
$356
Sep
$356
Oct
$356
Nov
$356
Dec
$462
Cheapest Average Expensive
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 $516. 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
Cheapest month: August23,140 fares analyzedTypical low: $276