Cheapest return flights from Oslo to Helsinki in September from $104

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

Return flights

24 Sep - 25 Sep Norwegian direct
24 Sep - 07 Oct Norwegian direct
24 Sep - 14 Oct Norwegian direct
01 Sep - 08 Sep Norwegian direct
01 Sep - 04 Sep Norwegian direct
01 Sep - 17 Sep Norwegian direct
01 Sep - 10 Sep Norwegian direct
01 Sep - 11 Sep Norwegian direct
01 Sep - 16 Sep Norwegian direct
01 Sep - 12 Sep Norwegian direct
09 Sep - 24 Sep Norwegian direct
09 Sep - 17 Sep Norwegian direct
17 Sep - 07 Oct Norwegian direct
22 Sep - 07 Oct Norwegian direct
24 Sep - 13 Oct Norwegian direct
24 Sep - 01 Oct Norwegian direct
15 Sep - 01 Oct Norwegian direct
17 Sep - 01 Oct Norwegian direct
22 Sep - 01 Oct Norwegian direct
16 Sep - 01 Oct Norwegian direct

Also check the deals for one-way flights from Oslo 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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