AirHint found the following cheapest return flights from Sofia (SOF) to Oslo (OSL) in October 2025 (see full year).

Return flights

16 Oct - 19 Oct	Air Serbia
09 Oct - 12 Oct	Air Serbia
09 Oct - 19 Oct	Norwegian	direct
09 Oct - 23 Oct	Norwegian	direct
09 Oct - 12 Oct	Norwegian	direct
16 Oct - 19 Oct	Norwegian	direct
16 Oct - 23 Oct	Norwegian	direct
22 Oct - 26 Oct	Ryanair
02 Oct - 19 Oct	Norwegian	direct
02 Oct - 23 Oct	Norwegian	direct

Also check the deals for one-way flights from Sofia 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.

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Cheapest return flights from Sofia to Oslo in October from $143

Return flights