AirHint found the following cheapest return flights from Geneva (GVA) to Bucharest (OTP) in September 2025 (see full year).

Return flights

30 Sep - 15 Oct	easyJet
29 Sep - 15 Oct	easyJet
30 Sep - 03 Oct	easyJet
29 Sep - 13 Oct	easyJet
29 Sep - 14 Oct	easyJet
28 Sep - 14 Oct	Air Serbia
28 Sep - 13 Oct	Air Serbia
25 Sep - 14 Oct	easyJet
24 Sep - 25 Sep	Vueling Airlines
27 Sep - 13 Oct	Aer Lingus
27 Sep - 14 Oct	Aer Lingus
22 Sep - 23 Sep	easyJet
22 Sep - 24 Sep	easyJet
27 Sep - 29 Sep	LOT
21 Sep - 24 Sep	easyJet
17 Sep - 22 Sep	easyJet
18 Sep - 25 Sep	Vueling Airlines
21 Sep - 25 Sep	easyJet
20 Sep - 27 Sep	SWISS
24 Sep - 24 Sep	easyJet

Also check the deals for one-way flights from Geneva to Bucharest 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 Bucharest

Cheap car rent in Bucharest

Cheapest return flights from Geneva to Bucharest in September from $147

Return flights