AirHint found the following cheapest return flights from Chicago (ORD) to St. Thomas (STT) in December 2025 (see full year).

Return flights

14 Dec - 19 Dec	Spirit Airlines
12 Dec - 19 Dec	Spirit Airlines
14 Dec - 20 Dec	Spirit Airlines
13 Dec - 19 Dec	Spirit Airlines
12 Dec - 20 Dec	Spirit Airlines
15 Dec - 19 Dec	Spirit Airlines
14 Dec - 31 Dec	Spirit Airlines
13 Dec - 20 Dec	Spirit Airlines
14 Dec - 19 Dec	United	direct
12 Dec - 31 Dec	Spirit Airlines
28 Dec - 05 Jan	Spirit Airlines
24 Dec - 05 Jan	Spirit Airlines

Also check the deals for one-way flights from Chicago to St. Thomas 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 Chicago to St. Thomas in December from $347

Return flights