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

Return flights

19 Dec - 25 Dec	Wizz Air
24 Dec - 28 Dec	Wizz Air
22 Dec - 29 Dec	Wizz Air
22 Dec - 01 Jan	Wizz Air
12 Dec - 14 Dec	Ryanair
01 Dec - 14 Dec	Wizz Air
31 Dec - 04 Jan	Air Serbia
11 Dec - 14 Dec	LOT
23 Dec - 01 Jan	LOT
24 Dec - 01 Jan	LOT
20 Dec - 26 Dec	Ryanair
30 Dec - 06 Jan	Ryanair
25 Dec - 03 Jan	Wizz Air
19 Dec - 23 Dec	Wizz Air
18 Dec - 20 Dec	Air Serbia

Also check the deals for one-way flights from Sofia 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 Sofia to Oslo in December from $141

Return flights