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

Return flights

28 Sep - 05 Oct	Wizz Air UK
25 Sep - 01 Oct	Wizz Air
18 Sep - 24 Sep	Wizz Air UK
18 Sep - 22 Sep	Wizz Air UK
14 Sep - 28 Sep	Wizz Air UK
11 Sep - 17 Sep	Wizz Air UK
21 Sep - 28 Sep	Wizz Air UK
25 Sep - 29 Sep	Wizz Air UK
14 Sep - 17 Sep	Wizz Air UK
14 Sep - 22 Sep	Wizz Air UK
18 Sep - 21 Sep	Wizz Air UK
29 Sep - 03 Oct	Wizz Air Malta
03 Sep - 08 Sep	Wizz Air UK
25 Sep - 05 Oct	Wizz Air UK
27 Sep - 03 Oct	Wizz Air UK
17 Sep - 01 Oct	Wizz Air UK
26 Sep - 03 Oct	Wizz Air UK
25 Sep - 02 Oct	Wizz Air
26 Sep - 07 Oct	Wizz Air UK
06 Sep - 11 Oct	Wizz Air

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 155€

Return flights