Cheapest return flights from Philadelphia to St. Thomas in March from $227

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

Return flights

25 Mar - 31 Mar jetBlue
05 Mar - 09 Mar Spirit Airlines
10 Mar - 24 Mar jetBlue
05 Mar - 24 Mar Spirit Airlines
05 Mar - 07 Mar Spirit Airlines
10 Mar - 31 Mar Spirit Airlines
15 Mar - 31 Mar Spirit Airlines
15 Mar - 24 Mar Spirit Airlines
10 Mar - 14 Mar Frontier Airlines
05 Mar - 14 Mar Spirit Airlines

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

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