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

Return flights

23 Apr - 26 Apr	Norwegian	direct
16 Apr - 26 Apr	Norwegian	direct
17 Apr - 20 Apr	Norwegian	direct
17 Apr - 26 Apr	Norwegian	direct
16 Apr - 20 Apr	Norwegian	direct
17 Apr - 08 May	Norwegian	direct
23 Apr - 08 May	Norwegian	direct
16 Apr - 19 Apr	airBaltic
09 Apr - 11 Apr	airBaltic
17 Apr - 19 Apr	Norwegian	direct
16 Apr - 19 Apr	Norwegian	direct
09 Apr - 11 Apr	Finnair	direct

Also check the deals for one-way flights from Helsinki to Oslo 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 Helsinki to Oslo in April from 94€

Return flights