Cheapest return flights from Oslo to Helsinki in September from 94€

Best time to book flights for Oslo (OSL) to Helsinki (HEL) flights at AirHint

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

Return flights

09 Sep - 23 Sep Norwegian direct
09 Sep - 15 Sep Norwegian direct
09 Sep - 29 Sep Norwegian direct
28 Sep - 29 Sep Norwegian direct
28 Sep - 16 Oct Norwegian direct
29 Sep - 16 Oct Norwegian direct
09 Sep - 28 Sep Norwegian direct
28 Sep - 03 Oct Norwegian direct
29 Sep - 03 Oct Norwegian direct
29 Sep - 29 Sep Norwegian

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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