AirHint found the following cheapest return flights from New York (LGA) to St. Thomas (STT) in September 2025 (see full year).

Return flights

26 Sep - 04 Oct	Spirit Airlines
01 Sep - 06 Sep	Spirit Airlines
01 Sep - 13 Sep	Spirit Airlines
01 Sep - 19 Sep	Spirit Airlines
06 Sep - 13 Sep	Spirit Airlines
06 Sep - 19 Sep	Spirit Airlines
18 Sep - 19 Sep	Spirit Airlines
18 Sep - 04 Oct	Spirit Airlines
27 Sep - 04 Oct	American Airlines
26 Sep - 05 Oct	Spirit Airlines
27 Sep - 05 Oct	Spirit Airlines
18 Sep - 05 Oct	Spirit Airlines
05 Sep - 10 Sep	American Airlines
03 Sep - 10 Sep	American Airlines

Also check the deals for one-way flights from New York to St. Thomas in September.

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 New York to St. Thomas in September from $296

Return flights