Cheapest return flights from Washington to St. Thomas in June from $457

AirHint found the following cheapest return flights from Washington (IAD) to St. Thomas (STT) in June 2026 (see full year).

Return flights

09 Jun - 16 Jun United direct
08 Jun - 15 Jun Frontier Airlines
09 Jun - 17 Jun Frontier Airlines
09 Jun - 17 Jun United direct
10 Jun - 17 Jun Frontier Airlines
10 Jun - 17 Jun United direct
11 Jun - 18 Jun Frontier Airlines
06 Jun - 13 Jun Frontier Airlines
14 Jun - 21 Jun United
13 Jun - 20 Jun Frontier Airlines

Also check the deals for one-way flights from Washington to St. Thomas in June.

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