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

Return flights

23 Sep - 03 Oct	easyJet	direct
22 Sep - 26 Sep	easyJet	direct
08 Sep - 17 Sep	easyJet	direct
09 Sep - 16 Sep	easyJet	direct
23 Sep - 28 Sep	easyJet	direct
26 Sep - 03 Oct	easyJet	direct
14 Sep - 16 Sep	easyJet	direct
23 Sep - 27 Sep	easyJet
22 Sep - 24 Sep	easyJet	direct
08 Sep - 15 Sep	easyJet
26 Sep - 02 Oct	easyJet	direct
23 Sep - 30 Sep	easyJet
14 Sep - 17 Sep	easyJet	direct
24 Sep - 01 Oct	SWISS
20 Sep - 11 Oct	SWISS
27 Sep - 03 Oct	Vueling Airlines
28 Sep - 05 Oct	easyJet
27 Sep - 02 Oct	easyJet
27 Sep - 04 Oct	SWISS
20 Sep - 02 Oct	easyJet

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 $143

Return flights