Cheapest return flights from St. Louis to San Juan in June from $297

Best time to book flights for St. Louis (STL) to San Juan (SJU) flights at AirHint

AirHint found the following cheapest return flights from St. Louis (STL) to San Juan (SJU) in June 2025 (see full year).

Return flights

17 Jun - 24 Jun Frontier Airlines
06 Jun - 10 Jun Frontier Airlines
14 Jun - 21 Jun Frontier Airlines
03 Jun - 07 Jun Frontier Airlines
10 Jun - 17 Jun Frontier Airlines

Also check the deals for one-way flights from St. Louis to San Juan in June.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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