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

Return flights

29 Sep - 08 Oct	Lufthansa
30 Sep - 08 Oct	Lufthansa
26 Sep - 28 Sep	Lufthansa
20 Sep - 27 Sep	Lufthansa
21 Sep - 29 Sep	Lufthansa
20 Sep - 23 Sep	Lufthansa
22 Sep - 25 Sep	ITA Airways
19 Sep - 22 Sep	Lufthansa
20 Sep - 21 Sep	Lufthansa
20 Sep - 22 Sep	Lufthansa
19 Sep - 26 Sep	Lufthansa
19 Sep - 21 Sep	Lufthansa
29 Sep - 01 Oct	Lufthansa

Also check the deals for one-way flights from Milan 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 Milan to Basel in September from $189

Return flights