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

Return flights

22 Sep - 23 Sep	easyJet
29 Sep - 01 Oct	easyJet
21 Sep - 28 Sep	Pegasus Airlines
20 Sep - 23 Sep	easyJet
20 Sep - 24 Sep	easyJet
19 Sep - 22 Sep	easyJet
23 Sep - 28 Sep	easyJet
21 Sep - 22 Sep	easyJet
29 Sep - 02 Oct	Air France
18 Sep - 21 Sep	Vueling Airlines
23 Sep - 04 Oct	Pegasus Airlines
29 Sep - 05 Oct	easyJet

Also check the deals for one-way flights from Basel 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 Basel to Zurich in September from $301

Return flights