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

Return flights

23 Dec - 09 Jan	Spirit Airlines
24 Dec - 10 Jan	Frontier Airlines
21 Dec - 09 Jan	Frontier Airlines
23 Dec - 26 Dec	Spirit Airlines
23 Dec - 25 Dec	Spirit Airlines
27 Dec - 05 Jan	Frontier Airlines
25 Dec - 28 Dec	Frontier Airlines
22 Dec - 07 Jan	Frontier Airlines
20 Dec - 08 Jan	Frontier Airlines
20 Dec - 23 Dec	Frontier Airlines
27 Dec - 03 Jan	Frontier Airlines
22 Dec - 05 Jan	Frontier Airlines
21 Dec - 05 Jan	Frontier Airlines

Also check the deals for one-way flights from Miami 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.

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Cheapest return flights from Miami to St. Croix Island in December from 501€

Return flights