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

Return flights

18 Sep - 25 Sep	Wizz Air Malta
11 Sep - 17 Sep	Ryanair
11 Sep - 18 Sep	Ryanair
08 Sep - 15 Sep	Wizz Air Malta
18 Sep - 02 Oct	Ryanair
15 Sep - 18 Sep	Wizz Air Malta
13 Sep - 17 Sep	Wizz Air Malta
24 Sep - 01 Oct	Ryanair
16 Sep - 20 Sep	Wizz Air Malta
24 Sep - 03 Oct	Ryanair
24 Sep - 02 Oct	Ryanair
10 Sep - 17 Sep	Wizz Air Malta
23 Sep - 02 Oct	Ryanair
18 Sep - 23 Sep	Ryanair
10 Sep - 16 Sep	Wizz Air Malta
29 Sep - 04 Oct	Ryanair
15 Sep - 03 Oct	Ryanair
22 Sep - 04 Oct	Ryanair
19 Sep - 03 Oct	Ryanair
24 Sep - 06 Oct	Ryanair

Also check the deals for one-way flights from Bucharest to Lisbon 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 Bucharest to Lisbon in September from 131€

Return flights