Cheapest one-way flights from Washington to St. Thomas in August from $74

AirHint found the following cheapest one-way flights from Washington (IAD) to St. Thomas (STT) in August 2025 (see full year).

One-Way flights

03 Aug Frontier Airlines
30 Aug Allegiant Air
25 Aug Allegiant Air
29 Aug Allegiant Air
01 Aug Allegiant Air
03 Aug United direct
01 Aug United direct

Also check the deals for return flights from Washington to St. Thomas in August.

Skyscanner

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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