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

Return flights

03 Aug - 07 Aug	Frontier Airlines
02 Aug - 05 Aug	Spirit Airlines
02 Aug - 04 Aug	Spirit Airlines
02 Aug - 06 Aug	Spirit Airlines
04 Aug - 05 Aug	Spirit Airlines
04 Aug - 06 Aug	Spirit Airlines
21 Aug - 06 Sep	Spirit Airlines
26 Aug - 06 Sep	Spirit Airlines
15 Aug - 18 Aug	Spirit Airlines
02 Aug - 07 Aug	Spirit Airlines
04 Aug - 07 Aug	Spirit Airlines
07 Aug - 16 Aug	Spirit Airlines
28 Aug - 01 Sep	Spirit Airlines

Also check the deals for one-way flights from Newark 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 Newark to St. Thomas in August from $218

Return flights