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

Return flights

31 Jul - 16 Aug	Spirit Airlines
31 Jul - 19 Aug	Spirit Airlines
31 Jul - 20 Aug	Spirit Airlines
31 Jul - 21 Aug	Spirit Airlines
31 Jul - 14 Aug	Spirit Airlines
31 Jul - 08 Aug	Spirit Airlines
31 Jul - 13 Aug	Spirit Airlines
31 Jul - 12 Aug	Spirit Airlines
31 Jul - 04 Aug	Spirit Airlines
31 Jul - 07 Aug	Spirit Airlines

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

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 July from 425€

Return flights