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

Return flights

05 Sep - 10 Sep	Wizz Air Malta
17 Sep - 16 Oct	Air Serbia
24 Sep - 30 Sep	Ryanair
03 Sep - 10 Sep	Air Serbia
24 Sep - 16 Oct	Ryanair
05 Sep - 08 Sep	Wizz Air Malta
20 Sep - 24 Sep	Air Serbia
24 Sep - 17 Oct	Ryanair
05 Sep - 12 Sep	Wizz Air Malta
26 Sep - 01 Oct	Wizz Air
24 Sep - 01 Oct	Ryanair
05 Sep - 06 Oct	Wizz Air Malta
14 Sep - 16 Sep	Air Serbia
14 Sep - 20 Sep	Air Serbia
26 Sep - 03 Oct	Wizz Air
17 Sep - 22 Sep	Air Serbia
09 Sep - 16 Sep	SWISS
28 Sep - 03 Oct	Wizz Air
14 Sep - 06 Oct	Air Serbia
07 Sep - 11 Oct	Air Serbia

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

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 Athens

Cheap car rent in Athens

Cheapest return flights from Oslo to Athens in September from 143€

Return flights