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

Return flights

26 Jan - 07 Feb	Spirit Airlines
23 Jan - 07 Feb	Spirit Airlines
26 Jan - 02 Feb	Spirit Airlines
28 Jan - 04 Feb	Frontier Airlines
23 Jan - 26 Jan	Spirit Airlines
16 Jan - 23 Jan	Spirit Airlines
10 Jan - 12 Jan	Spirit Airlines
23 Jan - 02 Feb	Spirit Airlines
27 Jan - 03 Feb	Frontier Airlines
09 Jan - 15 Jan	Spirit Airlines
16 Jan - 26 Jan	Spirit Airlines
16 Jan - 02 Feb	Spirit Airlines
08 Jan - 12 Jan	American Airlines
05 Jan - 08 Jan	Spirit Airlines
26 Jan - 13 Feb	Spirit Airlines
20 Jan - 27 Jan	jetBlue
20 Jan - 03 Feb	jetBlue
11 Jan - 21 Jan	Frontier Airlines

Also check the deals for one-way flights from Philadelphia to St. Croix Island 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. Croix Island in January from $195

Return flights