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

Return flights

10 Apr - 12 Apr	Norwegian	direct
22 Apr - 01 May	Norwegian	direct
10 Apr - 15 Apr	Norwegian	direct
10 Apr - 13 Apr	Norwegian
19 Apr - 01 May	Norwegian	direct
10 Apr - 13 Apr	Norwegian	direct
22 Apr - 03 May	Norwegian	direct
19 Apr - 03 May	Norwegian	direct
10 Apr - 01 May	Norwegian

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

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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Cheapest return flights from Oslo to Helsinki in April from $112

Return flights