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

Return flights

07 Dec - 11 Dec	Vueling Airlines
08 Dec - 10 Dec	Vueling Airlines
03 Dec - 08 Dec	Vueling Airlines
24 Dec - 02 Jan	Vueling Airlines
15 Dec - 20 Dec	Vueling Airlines
24 Dec - 28 Dec	Vueling Airlines
29 Dec - 04 Jan	Air Europa
19 Dec - 28 Dec	Vueling Airlines
27 Dec - 03 Jan	Lufthansa
27 Dec - 30 Dec	Iberia

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 114€

Return flights