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

Return flights

24 Sep - 30 Sep	Ryanair
25 Sep - 30 Sep	Ryanair
29 Sep - 06 Oct	Wizz Air Malta
25 Sep - 28 Sep	Ryanair
24 Sep - 29 Sep	Ryanair
17 Sep - 21 Sep	Ryanair
24 Sep - 28 Sep	Ryanair
26 Sep - 01 Oct	Ryanair
10 Sep - 14 Oct	Ryanair
15 Sep - 23 Sep	Ryanair
18 Sep - 21 Sep	Ryanair
22 Sep - 26 Sep	Wizz Air Malta
15 Sep - 17 Sep	Ryanair
10 Sep - 01 Oct	Wizz Air Malta	direct
19 Sep - 03 Oct	Ryanair
12 Sep - 01 Oct	Wizz Air Malta	direct
24 Sep - 01 Oct	Wizz Air Malta	direct
24 Sep - 15 Oct	Wizz Air Malta	direct
12 Sep - 03 Oct	Wizz Air Malta	direct
24 Sep - 13 Oct	Wizz Air Malta	direct

Also check the deals for one-way flights from Lisbon 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.

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Cheapest return flights from Lisbon to Bucharest in September from 117€

Return flights