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

Return flights

04 Jan - 10 Jan	Frontier Airlines
24 Jan - 31 Jan	Avianca
22 Jan - 31 Jan	Avianca
17 Jan - 21 Jan	American Airlines
24 Jan - 01 Feb	United
17 Jan - 20 Jan	Delta

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

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 Washington to St. Thomas in January from $269

Return flights