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

Return flights

16 Sep - 23 Sep	Condor
15 Sep - 23 Sep	Condor
30 Sep - 07 Oct	Condor
28 Sep - 18 Oct	Scandinavian Airlines
25 Sep - 28 Sep	Condor
18 Sep - 25 Sep	Condor
16 Sep - 01 Oct	Condor
25 Sep - 18 Oct	Scandinavian Airlines
23 Sep - 18 Oct	Condor
26 Sep - 18 Oct	Scandinavian Airlines
18 Sep - 11 Oct	Condor
19 Sep - 21 Sep	Condor
19 Sep - 26 Sep	Scandinavian Airlines
15 Sep - 19 Sep	Aer Lingus
20 Sep - 27 Sep	Turkish Airlines
19 Sep - 11 Oct	Turkish Airlines
30 Sep - 07 Oct	SWISS	direct
28 Sep - 18 Oct	SWISS	direct
25 Sep - 28 Sep	SWISS	direct
18 Sep - 25 Sep	SWISS	direct

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

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 September from $422

Return flights