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

Return flights

15 Oct - 23 Oct	Air Serbia
02 Oct - 09 Oct	Air Serbia
02 Oct - 08 Oct	Air Serbia
08 Oct - 12 Oct	Norwegian
04 Oct - 10 Oct	Scandinavian Airlines
15 Oct - 24 Oct	Air Serbia
03 Oct - 09 Oct	Air Serbia
03 Oct - 08 Oct	Air Serbia
09 Oct - 24 Oct	Air Serbia
06 Oct - 24 Oct	Air Serbia
30 Oct - 09 Nov	Air Serbia

Also check the deals for one-way flights from Oslo to Athens 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 Oslo to Athens in October from 147€

Return flights