AirHint found the following cheapest return flights from Boston (BOS) to Zurich (ZRH) in May 2026 (see full year).

Return flights

10 May - 17 May	Aer Lingus
01 May - 04 May	Icelandair
17 May - 21 May	Scandinavian Airlines
05 May - 19 May	Scandinavian Airlines
02 May - 16 May	Scandinavian Airlines
03 May - 21 May	Aer Lingus
02 May - 21 May	Scandinavian Airlines
02 May - 09 May	Scandinavian Airlines
02 May - 09 May	SWISS	direct
11 May - 18 May	Icelandair
20 May - 07 Jun	Aer Lingus
26 May - 02 Jun	Icelandair
31 May - 07 Jun	Icelandair
20 May - 07 Jun	SWISS	direct

Also check the deals for one-way flights from Boston to Zurich in May.

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 May from 427€

Return flights