Cheapest return flights from St. Louis to San Juan in July from $324

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 July 2025 (see full year).

Return flights

07 Jul - 10 Jul United
06 Jul - 10 Jul Spirit Airlines
03 Jul - 10 Jul Spirit Airlines
03 Jul - 09 Jul Spirit Airlines
13 Jul - 20 Jul Spirit Airlines
07 Jul - 11 Jul Spirit Airlines
12 Jul - 19 Jul Delta
08 Jul - 15 Jul United
02 Jul - 09 Jul American Airlines
12 Jul - 19 Jul Southwest Airlines direct

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

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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