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

Return flights

23 Sep - 26 Sep	easyJet	direct
19 Sep - 21 Sep	easyJet	direct
27 Sep - 04 Oct	easyJet	direct
03 Sep - 06 Sep	easyJet	direct
14 Sep - 02 Oct	Vueling Airlines
14 Sep - 15 Sep	Vueling Airlines
14 Sep - 18 Sep	Vueling Airlines
14 Sep - 25 Sep	Vueling Airlines

Also check the deals for one-way flights from Split to Basel 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 Split to Basel in September from 111€

Return flights