Cheapest return flights from Chicago to St. Thomas in March from $360

AirHint found the following cheapest return flights from Chicago (MDW) to St. Thomas (STT) in March 2026 (see full year).

Return flights

07 Mar - 13 Mar Frontier Airlines
09 Mar - 14 Mar Frontier Airlines
20 Mar - 28 Mar Frontier Airlines
01 Mar - 06 Mar Frontier Airlines
01 Mar - 07 Mar Frontier Airlines
04 Mar - 07 Mar Southwest Airlines
16 Mar - 22 Mar Frontier Airlines
16 Mar - 20 Mar Delta
01 Mar - 01 Mar Delta

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

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