Cheapest return flights from Oslo to Helsinki in September from $124

AirHint found the following cheapest return flights from Oslo (OSL) to Helsinki (HEL) in September 2026 (see full year).

Return flights

23 Sep - 06 Oct Norwegian direct
20 Sep - 06 Oct Norwegian direct
16 Sep - 06 Oct Norwegian direct
22 Sep - 06 Oct Norwegian direct
14 Sep - 16 Sep Norwegian direct
14 Sep - 18 Sep Norwegian direct
14 Sep - 22 Sep Norwegian direct
20 Sep - 22 Sep Norwegian direct
16 Sep - 18 Sep Norwegian direct
16 Sep - 22 Sep Norwegian direct
08 Sep - 16 Sep Norwegian direct
08 Sep - 18 Sep Norwegian direct
08 Sep - 22 Sep Norwegian direct
10 Sep - 16 Sep Norwegian direct
14 Sep - 01 Oct Norwegian direct
23 Sep - 01 Oct Norwegian direct
23 Sep - 08 Oct Norwegian direct
20 Sep - 01 Oct Norwegian direct
20 Sep - 08 Oct Norwegian direct
16 Sep - 01 Oct Norwegian direct

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

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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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