Cheapest return flights from Oslo to Helsinki in September from $92

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

Return flights

01 Sep - 16 Sep Norwegian direct
09 Sep - 17 Sep Norwegian direct
09 Sep - 10 Sep Norwegian direct
09 Sep - 24 Sep Norwegian direct
09 Sep - 16 Sep Norwegian direct
10 Sep - 17 Sep Norwegian direct
10 Sep - 24 Sep Norwegian direct
10 Sep - 16 Sep Norwegian direct
15 Sep - 17 Sep Norwegian direct
15 Sep - 24 Sep Norwegian direct
22 Sep - 08 Oct Norwegian direct
22 Sep - 09 Oct Norwegian direct
24 Sep - 08 Oct Norwegian direct
24 Sep - 09 Oct Norwegian direct
23 Sep - 08 Oct Norwegian direct
23 Sep - 09 Oct Norwegian direct
30 Sep - 08 Oct Norwegian direct
30 Sep - 20 Oct Norwegian direct
30 Sep - 15 Oct Norwegian direct
30 Sep - 09 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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