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

Return flights

18 Sep - 23 Sep	easyJet	direct
20 Sep - 23 Sep	easyJet	direct
19 Sep - 25 Sep	easyJet	direct
11 Sep - 15 Sep	easyJet	direct
18 Sep - 20 Sep	easyJet	direct
19 Sep - 27 Sep	easyJet
22 Sep - 25 Sep	easyJet
18 Sep - 21 Sep	easyJet
09 Sep - 13 Sep	easyJet	direct
27 Sep - 05 Oct	easyJet
16 Sep - 19 Sep	easyJet	direct
27 Sep - 05 Oct	easyJet	direct

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.

Book a cheap hotel in Basel

Cheap car rent in Basel

Cheapest return flights from Lisbon to Basel in September from 80€

Return flights