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

Return flights

19 Sep - 22 Sep	Spirit Airlines
19 Sep - 03 Oct	Spirit Airlines
19 Sep - 02 Oct	Spirit Airlines
19 Sep - 04 Oct	Spirit Airlines
02 Sep - 07 Sep	Spirit Airlines
04 Sep - 07 Sep	Spirit Airlines
02 Sep - 22 Sep	Spirit Airlines
04 Sep - 08 Sep	Spirit Airlines
16 Sep - 23 Sep	Delta	direct
02 Sep - 07 Sep	Delta	direct
04 Sep - 08 Sep	Delta	direct
19 Sep - 22 Sep	Delta	direct

Also check the deals for one-way flights from Atlanta 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 Atlanta to St. Thomas in September from 237€

Return flights