Cheapest return flights from San Juan to Castries in September from $509

AirHint found the following cheapest return flights from San Juan (SJU) to Castries (SLU) in September 2025 (see full year).

Return flights

20 Sep - 05 Oct Caribbean Airlines

Also check the deals for one-way flights from San Juan to Castries in September.

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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