Cheapest return flights from Sofia to Helsinki in September from $211

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

Return flights

29 Sep - 02 Oct Ryanair
20 Sep - 22 Sep Pegasus Airlines
13 Sep - 14 Sep Pegasus Airlines
04 Sep - 28 Sep Ryanair
04 Sep - 27 Sep Pegasus Airlines
30 Sep - 07 Oct Ryanair
11 Sep - 14 Sep Ryanair
14 Sep - 19 Sep Ryanair
19 Sep - 22 Sep Pegasus Airlines
18 Sep - 21 Sep Ryanair
05 Sep - 27 Sep Ryanair
03 Sep - 27 Sep Wizz Air

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

Skyscanner

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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