AirHint found the following cheapest return flights from Bilbao (BIO) to Oslo (OSL) in December 2025 (see full year).

Return flights

01 Dec - 11 Dec	Vueling Airlines
13 Dec - 15 Dec	easyJet
08 Dec - 11 Dec	Vueling Airlines
01 Dec - 07 Dec	Vueling Airlines
04 Dec - 07 Dec	easyJet
10 Dec - 13 Dec	Vueling Airlines
11 Dec - 14 Dec	Vueling Airlines
04 Dec - 09 Dec	easyJet
11 Dec - 15 Dec	Vueling Airlines
06 Dec - 14 Dec	Wizz Air
31 Dec - 06 Jan	Vueling Airlines
30 Dec - 04 Jan	easyJet
30 Dec - 03 Jan	easyJet

Also check the deals for one-way flights from Bilbao to Oslo in December.

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 Bilbao to Oslo in December from 131€

Return flights