AirHint found the following cheapest return flights from Athens (ATH) to Ljubljana (LJU) in May 2026 (see full year).

Return flights

26 May - 29 May	Air Serbia
12 May - 17 May	Air Serbia
19 May - 23 May	Air Serbia
22 May - 26 May	Air Serbia
01 May - 04 May	Air Serbia
08 May - 11 May	Air Serbia
08 May - 15 May	Air Serbia
14 May - 17 May	Air Serbia
05 May - 08 May	Air Serbia
01 May - 03 May	Air Serbia
29 May - 01 Jun	Air Serbia
28 May - 01 Jun	Air Serbia
29 May - 02 Jun	Air Serbia
29 May - 02 Jun	Aegean Airlines	direct
28 May - 18 Jun	Vueling Airlines

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

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 May from 150€

Return flights