Cheapest return flights from Philadelphia to St. Thomas in December from $334

AirHint found the following cheapest return flights from Philadelphia (PHL) to St. Thomas (STT) in December 2025 (see full year).

Return flights

30 Dec - 17 Jan Spirit Airlines
31 Dec - 17 Jan Spirit Airlines
30 Dec - 09 Jan Spirit Airlines
31 Dec - 09 Jan Spirit Airlines
30 Dec - 12 Jan Spirit Airlines
31 Dec - 12 Jan Spirit Airlines
21 Dec - 09 Jan Spirit Airlines
15 Dec - 22 Jan Frontier Airlines
21 Dec - 27 Dec Spirit Airlines
21 Dec - 29 Dec Spirit Airlines
23 Dec - 09 Jan Spirit Airlines
23 Dec - 12 Jan Spirit Airlines
14 Dec - 27 Dec Spirit Airlines
14 Dec - 29 Dec Spirit Airlines
18 Dec - 27 Dec Spirit Airlines
18 Dec - 29 Dec Spirit Airlines
23 Dec - 27 Dec Spirit Airlines
23 Dec - 29 Dec Spirit Airlines
24 Dec - 28 Dec Spirit Airlines
15 Dec - 27 Dec Spirit Airlines

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

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