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

Return flights

29 Sep - 03 Oct	easyJet	direct
30 Sep - 01 Oct	easyJet	direct
29 Sep - 02 Oct	easyJet	direct
29 Sep - 06 Oct	easyJet	direct
30 Sep - 02 Oct	easyJet	direct
30 Sep - 20 Oct	easyJet	direct
30 Sep - 30 Sep	easyJet
29 Sep - 20 Oct	easyJet	direct
23 Sep - 30 Sep	easyJet	direct
29 Sep - 04 Oct	easyJet
24 Sep - 03 Oct	easyJet	direct
16 Sep - 23 Sep	easyJet
22 Sep - 27 Sep	easyJet
16 Sep - 27 Sep	easyJet
24 Sep - 01 Oct	Vueling Airlines
17 Sep - 27 Sep	easyJet
25 Sep - 27 Sep	Vueling Airlines
24 Sep - 30 Sep	easyJet	direct
17 Sep - 24 Sep	easyJet	direct
26 Sep - 30 Sep	easyJet	direct

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 $141

Return flights