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

Return flights

10 Dec - 15 Dec	Wizz Air
03 Dec - 10 Dec	Wizz Air
26 Dec - 01 Jan	Wizz Air
08 Dec - 19 Dec	LOT
26 Dec - 30 Dec	Wizz Air
17 Dec - 24 Dec	Wizz Air
16 Dec - 01 Jan	Wizz Air
22 Dec - 24 Dec	Wizz Air
26 Dec - 05 Jan	LOT
19 Dec - 26 Dec	Wizz Air
23 Dec - 31 Dec	Wizz Air
29 Dec - 03 Jan	Wizz Air
27 Dec - 05 Jan	Scandinavian Airlines
20 Dec - 30 Dec	Ryanair
20 Dec - 02 Jan	Ryanair

Also check the deals for one-way flights from Oslo 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 Oslo to Sofia in December from 115€

Return flights