AirHint found the following cheapest return flights from Boston (BOS) to St. Thomas (STT) in May 2026 (see full year).

Return flights

11 May - 15 May	Spirit Airlines
30 May - 02 Jun	Spirit Airlines
27 May - 02 Jun	Spirit Airlines
09 May - 15 May	Spirit Airlines
07 May - 15 May	Spirit Airlines
11 May - 31 May	Spirit Airlines
08 May - 15 May	Spirit Airlines
30 May - 31 May	Spirit Airlines
27 May - 31 May	Spirit Airlines
15 May - 02 Jun	Spirit Airlines
31 May - 02 Jun	Spirit Airlines
11 May - 23 May	Spirit Airlines
09 May - 23 May	Spirit Airlines
07 May - 23 May	Spirit Airlines

Also check the deals for one-way flights from Boston to St. Thomas in May.

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 Boston to St. Thomas in May from 315€

Return flights