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

Return flights

26 Sep - 14 Oct	Vueling Airlines
24 Sep - 14 Oct	Vueling Airlines
28 Sep - 16 Oct	easyJet	direct
27 Sep - 16 Oct	easyJet	direct
30 Sep - 16 Oct	easyJet	direct
28 Sep - 15 Oct	easyJet	direct
28 Sep - 17 Oct	easyJet	direct
24 Sep - 01 Oct	Vueling Airlines
26 Sep - 15 Oct	Vueling Airlines
26 Sep - 13 Oct	Vueling Airlines
26 Sep - 30 Sep	Vueling Airlines
19 Sep - 24 Sep	easyJet
26 Sep - 29 Sep	Vueling Airlines
19 Sep - 22 Sep	easyJet
22 Sep - 24 Sep	Iberia
17 Sep - 22 Sep	easyJet
27 Sep - 29 Sep	easyJet
22 Sep - 23 Sep	Air Europa
25 Sep - 29 Sep	easyJet
28 Sep - 30 Sep	easyJet

Also check the deals for one-way flights from Alicante 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 Alicante to Basel in September from 134€

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