Cheapest return flights from Oslo to Helsinki in September from $95

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

10 Sep - 26 Sep Norwegian direct
12 Sep - 26 Sep Norwegian direct
10 Sep - 11 Sep Norwegian direct
10 Sep - 23 Sep Norwegian direct
10 Sep - 18 Sep Norwegian direct
28 Sep - 17 Oct Norwegian direct
17 Sep - 26 Sep Norwegian direct
18 Sep - 26 Sep Norwegian direct
12 Sep - 23 Sep Norwegian direct
12 Sep - 18 Sep Norwegian direct
17 Sep - 23 Sep Norwegian direct
28 Sep - 13 Oct Norwegian direct
28 Sep - 03 Oct Norwegian direct
17 Sep - 03 Oct Norwegian direct
18 Sep - 03 Oct Norwegian direct
12 Sep - 03 Oct 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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