AirHint found the following cheapest return flights from San Juan (SJU) to St. Croix Island (STX) in December 2025 (see full year).

Return flights

27 Dec - 28 Dec	jetBlue	direct
15 Dec - 19 Dec	jetBlue	direct
05 Dec - 08 Dec	jetBlue	direct
12 Dec - 14 Dec	jetBlue	direct
26 Dec - 29 Dec	jetBlue	direct
22 Dec - 24 Dec	jetBlue	direct
10 Dec - 17 Dec	jetBlue	direct
27 Dec - 27 Dec	Cape Air	direct
02 Dec - 02 Dec	Cape Air	direct
01 Dec - 01 Dec	Cape Air

Also check the deals for one-way flights from San Juan to St. Croix Island in December.

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.

Book a cheap hotel in St. Croix Island

Cheap car rent in St. Croix Island

Cheapest return flights from San Juan to St. Croix Island in December from $89

Return flights