Cheapest one-way flights from Miami to Castries in August from $240

AirHint found the following cheapest one-way flights from Miami (MIA) to Castries (SLU) in August 2025 (see full year).

One-Way flights

14 Aug Spirit Airlines
05 Aug Spirit Airlines
06 Aug Spirit Airlines
04 Aug Delta
15 Aug American Airlines direct
14 Aug American Airlines direct
08 Aug Frontier Airlines

Also check the deals for return flights from Miami to Castries in August.

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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