AirHint found the following cheapest return flights from Amsterdam (AMS) to Ljubljana (LJU) in September 2025 (see full year).

Return flights

14 Sep - 18 Sep	transavia	direct
09 Sep - 18 Sep	transavia	direct
18 Sep - 02 Oct	transavia	direct
05 Sep - 11 Sep	transavia	direct
07 Sep - 11 Sep	transavia	direct
04 Sep - 11 Sep	transavia	direct
23 Sep - 26 Sep	transavia	direct
28 Sep - 02 Oct	transavia	direct
12 Sep - 16 Sep	transavia	direct
14 Sep - 19 Sep	transavia	direct
02 Sep - 08 Sep	transavia
02 Sep - 05 Sep	transavia
28 Sep - 01 Oct	transavia
21 Sep - 12 Oct	transavia	direct
26 Sep - 06 Oct	transavia
28 Sep - 05 Oct	transavia	direct
27 Sep - 02 Oct	Air Serbia
17 Sep - 20 Oct	Air Serbia
27 Sep - 05 Oct	Lufthansa
26 Sep - 06 Oct	KLM	direct

Also check the deals for one-way flights from Amsterdam to Ljubljana 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.

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Cheapest return flights from Amsterdam to Ljubljana in September from 144€

Return flights