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

Return flights

07 Dec - 20 Dec	Ryanair	direct
19 Dec - 20 Dec	Ryanair	direct
18 Dec - 04 Jan	Ryanair
20 Dec - 04 Jan	Ryanair	direct
19 Dec - 04 Jan	Ryanair	direct
19 Dec - 03 Jan	Ryanair	direct
18 Dec - 04 Jan	Wizz Air	direct

Also check the deals for one-way flights from Brussels to Sofia 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 Sofia in December from 58€

Return flights