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

Return flights

26 Aug - 02 Sep	SWISS
19 Aug - 12 Sep	SWISS
20 Aug - 27 Aug	Lufthansa
19 Aug - 27 Aug	SWISS
20 Aug - 26 Aug	Lufthansa
19 Aug - 26 Aug	Lufthansa
30 Aug - 09 Sep	Austrian Airlines
21 Aug - 27 Aug	Lufthansa
21 Aug - 28 Aug	Lufthansa
31 Aug - 21 Sep	Lufthansa
21 Aug - 29 Aug	Lufthansa
26 Aug - 29 Aug	SWISS
20 Aug - 31 Aug	Lufthansa
29 Aug - 09 Sep	American Airlines
29 Aug - 20 Sep	Scandinavian Airlines

Also check the deals for one-way flights from Boston to Warsaw 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 Warsaw in August from $392

Return flights