AirHint found the following cheapest return flights from Boston (BOS) to Prague (PRG) in August 2025 (see full year).

Return flights

16 Aug - 25 Aug	Air Canada
10 Aug - 21 Aug	Delta
18 Aug - 02 Sep	Aer Lingus
18 Aug - 03 Sep	Aer Lingus
05 Aug - 25 Aug	SWISS
06 Aug - 11 Aug	Air Canada
06 Aug - 14 Aug	SWISS
14 Aug - 28 Aug	Air Canada
17 Aug - 31 Aug	Icelandair
01 Aug - 10 Aug	Air Canada

Also check the deals for one-way flights from Boston to Prague in August.

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 Boston to Prague in August from $370

Return flights