AirHint found the following cheapest return flights from Boston (BOS) to Frankfurt (FRA) in August 2026 (see full year).

Return flights

07 Aug - 21 Aug	Aer Lingus
03 Aug - 13 Aug	Aer Lingus
02 Aug - 27 Aug	Aer Lingus
10 Aug - 24 Aug	Aer Lingus
04 Aug - 06 Aug	TAP
10 Aug - 24 Aug	Condor	direct
02 Aug - 27 Aug	Condor	direct
07 Aug - 21 Aug	Condor	direct
02 Aug - 09 Aug	Lufthansa	direct
07 Aug - 14 Aug	Lufthansa	direct
27 Aug - 03 Sep	Icelandair
27 Aug - 03 Sep	Lufthansa	direct

Also check the deals for one-way flights from Boston to Frankfurt 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 Frankfurt in August from 537€

Return flights