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

Return flights

17 Sep - 21 Sep	Wizz Air
26 Sep - 29 Sep	Wizz Air
11 Sep - 18 Sep	Wizz Air
20 Sep - 23 Sep	Wizz Air
23 Sep - 28 Sep	Wizz Air
20 Sep - 24 Sep	Wizz Air
18 Sep - 22 Sep	Wizz Air
16 Sep - 23 Sep	Wizz Air
19 Sep - 23 Sep	Wizz Air
10 Sep - 13 Sep	Wizz Air
28 Sep - 05 Oct	Wizz Air

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

Return flights