Cheapest one-way flights from Oslo to Helsinki in September from 40€

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

One-Way flights

24 Sep Norwegian direct
22 Sep Norwegian direct
10 Sep Norwegian direct
01 Sep Norwegian direct
17 Sep Norwegian direct
15 Sep Norwegian direct
09 Sep Norwegian direct
16 Sep Norwegian direct
11 Sep Norwegian direct
12 Sep airBaltic

Also check the deals for return 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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