Cheapest return flights from Bilbao to Bucharest in September from $97

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

Return flights

30 Sep - 07 Oct Vueling Airlines
24 Sep - 30 Sep Vueling Airlines
29 Sep - 06 Oct Vueling Airlines
30 Sep - 02 Oct Vueling Airlines
24 Sep - 01 Oct Vueling Airlines
30 Sep - 06 Oct Vueling Airlines
29 Sep - 02 Oct Air Europa
22 Sep - 30 Sep Vueling Airlines
23 Sep - 30 Sep Air Europa
30 Sep - 05 Oct Vueling Airlines
24 Sep - 28 Sep Vueling Airlines
12 Sep - 16 Sep Vueling Airlines
22 Sep - 23 Sep Vueling Airlines
17 Sep - 21 Sep Vueling Airlines
29 Sep - 04 Oct Air Europa
20 Sep - 30 Sep Air Europa
16 Sep - 20 Sep Vueling Airlines
28 Sep - 02 Oct Air Europa
29 Sep - 05 Oct Vueling Airlines
20 Sep - 22 Sep Air Europa

Also check the deals for one-way flights from Bilbao to Bucharest in September.

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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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