Cheapest return HEL–OSL flights, September

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

Return flights

10 Sep - 14 Sep airBaltic
10 Sep - 13 Sep airBaltic
08 Sep - 15 Sep airBaltic
08 Sep - 15 Sep Norwegian direct
10 Sep - 21 Sep Norwegian direct
10 Sep - 14 Sep Norwegian direct
10 Sep - 15 Sep Norwegian direct
08 Sep - 21 Sep Norwegian direct
08 Sep - 14 Sep Norwegian direct
08 Sep - 09 Sep Norwegian direct
28 Sep - 02 Oct Norwegian direct
25 Sep - 02 Oct Norwegian direct
22 Sep - 02 Oct Norwegian direct
17 Sep - 02 Oct Norwegian direct
14 Sep - 02 Oct Norwegian direct
21 Sep - 02 Oct Norwegian direct

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

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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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