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

Return flights

15 Dec - 07 Jan	Ryanair
13 Dec - 07 Jan	Ryanair
14 Dec - 08 Jan	Ryanair
11 Dec - 13 Dec	Ryanair
14 Dec - 07 Jan	Ryanair
22 Dec - 05 Jan	Wizz Air
08 Dec - 15 Dec	Ryanair
11 Dec - 19 Dec	Ryanair
19 Dec - 23 Dec	Ryanair
11 Dec - 21 Dec	Ryanair
12 Dec - 19 Dec	Wizz Air
19 Dec - 05 Jan	Ryanair
10 Dec - 17 Dec	Turkish Airlines
09 Dec - 19 Dec	Pegasus Airlines
11 Dec - 20 Dec	Ryanair
25 Dec - 28 Dec	Wizz Air

Also check the deals for one-way flights from Sofia to Helsinki 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 Helsinki in December from 171€

Return flights