AirHint found the following cheapest return flights from Miami (MIA) to St. Thomas (STT) in August 2025 (see full year).

Return flights

22 Aug - 06 Sep	Spirit Airlines
30 Aug - 09 Sep	Spirit Airlines
23 Aug - 30 Aug	Spirit Airlines
23 Aug - 02 Sep	Spirit Airlines
24 Aug - 29 Aug	Spirit Airlines
23 Aug - 23 Aug	Spirit Airlines
30 Aug - 31 Aug	Spirit Airlines
17 Aug - 25 Aug	Spirit Airlines
21 Aug - 24 Aug	Spirit Airlines
17 Aug - 20 Aug	Spirit Airlines
19 Aug - 26 Aug	Spirit Airlines
17 Aug - 25 Aug	American Airlines	direct
23 Aug - 02 Sep	American Airlines	direct

Also check the deals for one-way flights from Miami to St. Thomas in August.

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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Cheapest return flights from Miami to St. Thomas in August from 284€

Return flights