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

Return flights

30 Sep - 07 Oct	easyJet	direct
29 Sep - 08 Oct	easyJet	direct
29 Sep - 03 Oct	easyJet	direct
23 Sep - 04 Oct	easyJet
23 Sep - 24 Sep	easyJet	direct
23 Sep - 26 Sep	easyJet
23 Sep - 23 Sep	easyJet
29 Sep - 04 Oct	easyJet
22 Sep - 24 Sep	easyJet	direct
02 Sep - 15 Sep	easyJet
14 Sep - 17 Sep	easyJet	direct
29 Sep - 05 Oct	easyJet
08 Sep - 17 Sep	easyJet	direct
03 Sep - 17 Sep	easyJet	direct
14 Sep - 19 Sep	easyJet
23 Sep - 30 Sep	easyJet
28 Sep - 08 Oct	easyJet	direct
28 Sep - 03 Oct	easyJet	direct
29 Sep - 01 Oct	easyJet
19 Sep - 06 Oct	Vueling Airlines

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 84€

Return flights