Cheapest return flights from Philadelphia to St. Thomas in May from $175

Best time to book flights for Philadelphia (PHL) to St. Thomas (STT) flights at AirHint

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

Return flights

18 May - 23 May Frontier Airlines
03 May - 10 May Spirit Airlines
07 May - 13 May Spirit Airlines
06 May - 13 May Spirit Airlines
12 May - 15 May Spirit Airlines
15 May - 19 May Frontier Airlines
09 May - 12 May Spirit Airlines
01 May - 07 May Spirit Airlines
01 May - 06 May Frontier Airlines
03 May - 06 May Spirit Airlines

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

Skyscanner

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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