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

Return flights

18 Aug - 26 Aug	Condor
07 Aug - 14 Aug	Condor
13 Aug - 20 Aug	Condor
08 Aug - 15 Aug	Condor
25 Aug - 08 Sep	TAP
28 Aug - 13 Sep	Condor
20 Aug - 06 Sep	Condor
20 Aug - 05 Sep	Condor
07 Aug - 25 Aug	Condor
11 Aug - 18 Aug	Condor
19 Aug - 26 Aug	Icelandair
20 Aug - 07 Sep	Condor
20 Aug - 04 Sep	Condor
21 Aug - 04 Sep	Condor
08 Aug - 16 Aug	Condor
07 Aug - 12 Aug	Condor
29 Aug - 05 Sep	Condor
12 Aug - 18 Aug	Condor
27 Aug - 03 Sep	Icelandair
27 Aug - 03 Sep	United	direct

Also check the deals for one-way flights from Boston to Zurich 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 Zurich in August from 420€

Return flights