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

Return flights

22 Aug - 28 Aug	Spirit Airlines
24 Aug - 28 Aug	Spirit Airlines
19 Aug - 28 Aug	Spirit Airlines
22 Aug - 24 Aug	Frontier Airlines
24 Aug - 26 Aug	Spirit Airlines
22 Aug - 26 Aug	Spirit Airlines
19 Aug - 26 Aug	Spirit Airlines
19 Aug - 24 Aug	Spirit Airlines

Also check the deals for one-way flights from Indianapolis 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 Indianapolis to St. Thomas in August from 369€

Return flights