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

One-Way flights

07 Oct	Norwegian	direct
31 Oct	Norwegian	direct
24 Oct	Norwegian	direct
14 Oct	Norwegian	direct
20 Oct	Norwegian	direct
09 Oct	Norwegian	direct
27 Oct	Norwegian	direct
19 Oct	airBaltic
03 Oct	airBaltic
05 Oct	airBaltic

Also check the deals for return flights from Helsinki to Oslo in October.

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.

Book a cheap hotel in Oslo

Cheap car rent in Oslo

Cheapest one-way flights from Helsinki to Oslo in October from 37€

One-Way flights