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

Return flights

30 Aug - 20 Sep	Icelandair
28 Aug - 01 Sep	Scandinavian Airlines
28 Aug - 02 Sep	Scandinavian Airlines
26 Aug - 03 Sep	Ryanair
25 Aug - 29 Aug	Condor	direct
28 Aug - 02 Sep	Condor	direct
21 Aug - 31 Aug	Condor	direct
26 Aug - 31 Aug	Condor	direct
29 Aug - 08 Sep	Condor	direct
29 Aug - 07 Sep	Condor	direct
28 Aug - 01 Sep	Condor	direct
26 Aug - 03 Sep	Condor	direct
25 Aug - 06 Sep	Condor	direct
25 Aug - 30 Aug	TAP
11 Aug - 22 Aug	SWISS
12 Aug - 21 Aug	SWISS
07 Aug - 18 Aug	Lufthansa
07 Aug - 17 Aug	Lufthansa
05 Aug - 15 Aug	SWISS
12 Aug - 19 Aug	Lufthansa

Also check the deals for one-way flights from Frankfurt to Boston 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 Frankfurt to Boston in August from $529

Return flights