Cheapest return flights from Miami to Castries in September from $530

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

Return flights

26 Sep - 03 Oct Caribbean Airlines
13 Sep - 16 Sep Frontier Airlines
27 Sep - 30 Sep Frontier Airlines
16 Sep - 21 Sep Frontier Airlines
05 Sep - 17 Sep Caribbean Airlines
26 Sep - 03 Oct American Airlines direct

Also check the deals for one-way flights from Miami 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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