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

Return flights

06 Dec - 08 Dec	Ryanair
05 Dec - 07 Dec	Wizz Air
11 Dec - 15 Dec	Ryanair
04 Dec - 08 Dec	Ryanair
05 Dec - 11 Dec	airBaltic
05 Dec - 08 Dec	airBaltic
06 Dec - 09 Dec	Ryanair
19 Dec - 05 Jan	airBaltic
26 Dec - 05 Jan	airBaltic
11 Dec - 14 Dec	Ryanair
01 Dec - 04 Dec	Ryanair
01 Dec - 05 Dec	Ryanair
31 Dec - 04 Jan	Wizz Air
30 Dec - 04 Jan	Ryanair
26 Dec - 03 Jan	airBaltic

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 133€

Return flights