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

Return flights

24 Aug - 02 Sep	Icelandair
24 Aug - 07 Sep	Icelandair
18 Aug - 25 Aug	Icelandair
20 Aug - 27 Aug	Icelandair
23 Aug - 07 Sep	Icelandair
17 Aug - 24 Aug	Icelandair
18 Aug - 24 Aug	Icelandair
26 Aug - 02 Sep	Icelandair
31 Aug - 07 Sep	Icelandair
21 Aug - 04 Sep	Icelandair
28 Aug - 04 Sep	Icelandair
11 Aug - 19 Aug	TAP
22 Aug - 29 Aug	Icelandair
22 Aug - 07 Sep	Icelandair
22 Aug - 31 Aug	TAP
10 Aug - 24 Aug	TAP
04 Aug - 13 Aug	Icelandair
11 Aug - 18 Aug	TAP
24 Aug - 02 Sep	United	direct
26 Aug - 02 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 347€

Return flights