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

One-Way flights

02 Dec	Scandinavian Airlines	direct
03 Dec	Scandinavian Airlines	direct
07 Dec	Scandinavian Airlines	direct
11 Dec	Scandinavian Airlines	direct
16 Dec	Scandinavian Airlines	direct
14 Dec	Scandinavian Airlines	direct
12 Dec	Scandinavian Airlines	direct
18 Dec	Scandinavian Airlines	direct
23 Dec	Scandinavian Airlines
26 Dec	Brussels Airlines	direct

Also check the deals for return flights from Oslo to Brussels 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 one-way flights from Oslo to Brussels in December from 50€

One-Way flights