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

Return flights

13 Sep - 17 Sep	easyJet	direct
23 Sep - 30 Sep	easyJet
22 Sep - 25 Sep	Vueling Airlines
22 Sep - 24 Sep	Vueling Airlines
18 Sep - 23 Sep	easyJet	direct
16 Sep - 25 Sep	easyJet	direct
16 Sep - 23 Sep	easyJet	direct
17 Sep - 01 Oct	easyJet
16 Sep - 24 Sep	Vueling Airlines
16 Sep - 17 Sep	easyJet	direct
19 Sep - 23 Sep	easyJet	direct
27 Sep - 04 Oct	easyJet
30 Sep - 01 Oct	easyJet
30 Sep - 03 Oct	easyJet
27 Sep - 03 Oct	easyJet
27 Sep - 04 Oct	easyJet	direct
29 Sep - 03 Oct	easyJet
17 Sep - 01 Oct	easyJet	direct
30 Sep - 01 Oct	easyJet	direct
28 Sep - 03 Oct	Vueling Airlines

Also check the deals for one-way flights from Lisbon 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 Lisbon to Basel in September from $169

Return flights