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

Return flights

11 Dec - 15 Dec	Ryanair
09 Dec - 14 Dec	Ryanair
06 Dec - 13 Dec	Ryanair
03 Dec - 09 Dec	Ryanair
12 Dec - 17 Dec	Ryanair
10 Dec - 15 Dec	Ryanair
03 Dec - 07 Dec	Ryanair
02 Dec - 06 Dec	Ryanair
17 Dec - 08 Jan	Ryanair
22 Dec - 05 Jan	Ryanair
10 Dec - 17 Dec	Ryanair
03 Dec - 10 Dec	Ryanair
31 Dec - 05 Jan	Ryanair
29 Dec - 08 Jan	Ryanair
29 Dec - 08 Jan	Scandinavian Airlines	direct
17 Dec - 07 Jan	Scandinavian Airlines
30 Dec - 01 Jan	Ryanair
17 Dec - 06 Jan	Scandinavian Airlines
17 Dec - 05 Jan	Scandinavian Airlines
22 Dec - 04 Jan	Ryanair

Also check the deals for one-way flights from Brussels 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 Brussels to Oslo in December from 90€

Return flights