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

Return flights

25 Sep - 28 Sep	Condor
30 Sep - 07 Oct	Condor
07 Sep - 18 Sep	Condor
26 Sep - 18 Oct	Aer Lingus
22 Sep - 18 Oct	Aer Lingus
30 Sep - 05 Oct	Aer Lingus
23 Sep - 02 Oct	Condor
15 Sep - 29 Sep	Condor
28 Sep - 05 Oct	Condor
25 Sep - 02 Oct	Condor
02 Sep - 07 Sep	Aer Lingus
28 Sep - 18 Oct	Scandinavian Airlines
28 Sep - 04 Oct	Scandinavian Airlines
18 Sep - 11 Oct	Aer Lingus
05 Sep - 19 Sep	Scandinavian Airlines
08 Sep - 15 Sep	Icelandair
10 Sep - 17 Sep	Icelandair
23 Sep - 30 Sep	Icelandair
17 Sep - 24 Sep	Icelandair
11 Sep - 18 Sep	Icelandair

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 392€

Return flights