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

Return flights

15 Sep - 24 Sep	Wizz Air UK
15 Sep - 17 Sep	Wizz Air UK
10 Sep - 18 Sep	Wizz Air
21 Sep - 28 Sep	Wizz Air UK
04 Sep - 18 Sep	Wizz Air UK
07 Sep - 17 Sep	Wizz Air
15 Sep - 29 Sep	Wizz Air UK
04 Sep - 14 Sep	Wizz Air UK
22 Sep - 28 Sep	Wizz Air UK
14 Sep - 18 Sep	Wizz Air
25 Sep - 02 Oct	Wizz Air UK
24 Sep - 01 Oct	Wizz Air UK
29 Sep - 08 Oct	Wizz Air UK
29 Sep - 03 Oct	Wizz Air UK
28 Sep - 01 Oct	Wizz Air
26 Sep - 02 Oct	Wizz Air UK
27 Sep - 02 Oct	Ryanair
28 Sep - 05 Oct	Wizz Air UK
22 Sep - 01 Oct	Wizz Air
29 Sep - 05 Oct	Ryanair

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 183€

Return flights