AirHint found the following cheapest return flights from Philadelphia (PHL) to St. Thomas (STT) in January 2026 (see full year).

Return flights

08 Jan - 12 Jan	Spirit Airlines
28 Jan - 03 Feb	jetBlue
21 Jan - 26 Jan	Spirit Airlines
08 Jan - 26 Jan	Spirit Airlines
21 Jan - 08 Feb	Spirit Airlines
01 Jan - 12 Jan	Spirit Airlines
15 Jan - 26 Jan	Spirit Airlines
15 Jan - 20 Jan	Spirit Airlines
28 Jan - 03 Feb	American Airlines	direct
21 Jan - 26 Jan	American Airlines	direct
15 Jan - 20 Jan	American Airlines	direct
08 Jan - 12 Jan	American Airlines	direct
14 Jan - 21 Jan	Delta

Also check the deals for one-way flights from Philadelphia to St. Thomas in January.

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 Philadelphia to St. Thomas in January from $312

Return flights