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

Return flights

30 Sep - 08 Oct	Wizz Air UK
29 Sep - 05 Oct	Wizz Air Malta
29 Sep - 01 Oct	Wizz Air UK
30 Sep - 01 Oct	Wizz Air UK
24 Sep - 01 Oct	Wizz Air UK
22 Sep - 24 Sep	Wizz Air UK
16 Sep - 30 Sep	Wizz Air UK
23 Sep - 24 Sep	Wizz Air UK
28 Sep - 01 Oct	Wizz Air UK
23 Sep - 30 Sep	Wizz Air UK
29 Sep - 03 Oct	Wizz Air UK
30 Sep - 03 Oct	Wizz Air UK
22 Sep - 01 Oct	Wizz Air UK
25 Sep - 01 Oct	easyJet
23 Sep - 26 Sep	Wizz Air UK
21 Sep - 24 Sep	Wizz Air UK
18 Sep - 22 Sep	Wizz Air UK
29 Sep - 30 Sep	Wizz Air UK
23 Sep - 27 Sep	Wizz Air UK
28 Sep - 30 Sep	Wizz Air UK

Also check the deals for one-way flights from London 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 London to Ljubljana in September from $189

Return flights