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

Return flights

26 Sep - 02 Oct	transavia	direct
26 Sep - 30 Sep	transavia	direct
18 Sep - 25 Sep	transavia	direct
09 Sep - 18 Sep	transavia	direct
02 Sep - 05 Sep	transavia	direct
29 Sep - 02 Oct	easyJet
05 Sep - 12 Sep	transavia
16 Sep - 21 Sep	transavia
05 Sep - 11 Sep	transavia
02 Sep - 04 Sep	transavia	direct
19 Sep - 22 Sep	transavia
05 Sep - 14 Sep	transavia
30 Sep - 05 Oct	transavia	direct
28 Sep - 05 Oct	transavia	direct
29 Sep - 11 Oct	SWISS
29 Sep - 11 Oct	KLM	direct
29 Sep - 02 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 146€

Return flights