Cheapest return flights from St. Louis (STL) to San Juan (SJU), August

Select a price to book. see full year.

Dates, airline, and price
Dates Airline Price
15 Aug 19 Aug Frontier Airlines
06 Aug 12 Aug Frontier Airlines
27 Aug 01 Sep Frontier Airlines
11 Aug 18 Aug Frontier Airlines
01 Aug 05 Aug Frontier Airlines
02 Aug 14 Aug Frontier Airlines
13 Aug 17 Aug Frontier Airlines
13 Aug 16 Aug Frontier Airlines
22 Aug 25 Aug Southwest Airlines
28 Aug 04 Sep Southwest Airlines
19 Aug 25 Aug Southwest Airlines
14 Aug 18 Aug Frontier Airlines
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deals for one-way flights from St. Louis to San Juan in August.

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Cheap car rent in Luis Munoz Marin Intl

Updated Jul 15, 2026.

About these fares

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