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

Return flights

28 Aug - 11 Sep	Icelandair
18 Aug - 25 Aug	Icelandair
25 Aug - 08 Sep	Icelandair
19 Aug - 26 Aug	Icelandair
20 Aug - 26 Aug	Icelandair
24 Aug - 01 Sep	Icelandair
30 Aug - 06 Sep	Icelandair
24 Aug - 02 Sep	TAP
25 Aug - 02 Sep	TAP
28 Aug - 04 Sep	Icelandair
06 Aug - 20 Aug	Icelandair
29 Aug - 01 Sep	TAP
16 Aug - 19 Aug	Condor
14 Aug - 21 Aug	Icelandair
26 Aug - 02 Sep	United	direct
25 Aug - 02 Sep	SWISS	direct
07 Aug - 12 Aug	Condor
20 Aug - 27 Aug	United	direct
06 Aug - 13 Aug	United	direct
01 Aug - 17 Aug	Condor

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 $388

Return flights