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

Return flights

30 Oct - 03 Nov	Ryanair
03 Oct - 08 Oct	Ryanair
08 Oct - 15 Oct	Wizz Air
30 Oct - 02 Nov	Ryanair
10 Oct - 01 Nov	Ryanair
22 Oct - 29 Oct	Ryanair
05 Oct - 10 Oct	Wizz Air
31 Oct - 09 Nov	Ryanair
22 Oct - 28 Oct	Ryanair
20 Oct - 26 Oct	Ryanair
06 Oct - 09 Oct	Ryanair
02 Oct - 05 Oct	Ryanair
06 Oct - 10 Oct	Wizz Air

Also check the deals for one-way flights from Sofia to Helsinki in October.

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 October from 163€

Return flights