AirHint found the following cheapest return flights from Athens (ATH) to Ljubljana (LJU) in August 2025 (see full year).

Return flights

27 Aug - 31 Aug	Air Serbia
27 Aug - 02 Sep	Air Serbia
19 Aug - 22 Aug	Air Serbia
19 Aug - 25 Aug	Air Serbia
19 Aug - 26 Aug	Air Serbia
26 Aug - 31 Aug	SKY express
26 Aug - 29 Aug	SKY express
19 Aug - 24 Aug	Air Serbia
29 Aug - 02 Sep	Aegean Airlines
28 Aug - 02 Sep	Aegean Airlines
20 Aug - 22 Aug	Air Serbia
26 Aug - 02 Sep	SKY express
27 Aug - 03 Sep	Air Serbia
20 Aug - 23 Aug	Air Serbia
20 Aug - 24 Aug	Air Serbia
29 Aug - 02 Sep	Aegean Airlines	direct
31 Aug - 03 Sep	Air Serbia
26 Aug - 02 Sep	Aegean Airlines	direct
25 Aug - 03 Sep	Turkish Airlines
25 Aug - 01 Sep	Air Serbia

Also check the deals for one-way flights from Athens to Ljubljana in August.

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 Athens to Ljubljana in August from 163€

Return flights