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

Return flights

11 May - 25 May	Condor
14 May - 28 May	Condor
15 May - 31 May	Condor
21 May - 31 May	Condor
06 May - 18 May	TAP
12 May - 20 May	LEVEL
21 May - 07 Jun	Condor
22 May - 08 Jun	Condor
22 May - 07 Jun	Condor
02 May - 21 May	LEVEL
03 May - 21 May	Scandinavian Airlines
20 May - 07 Jun	Condor
01 May - 31 May	Aer Lingus
03 May - 21 May	SWISS	direct
26 May - 02 Jun	Icelandair
31 May - 07 Jun	Icelandair
20 May - 07 Jun	SWISS	direct
22 May - 08 Jun	SWISS	direct
22 May - 07 Jun	SWISS	direct
21 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 309€

Return flights