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

Return flights

29 Sep - 08 Oct	easyJet	direct
23 Sep - 25 Sep	easyJet	direct
23 Sep - 07 Oct	easyJet	direct
29 Sep - 30 Sep	easyJet	direct
16 Sep - 30 Sep	easyJet	direct
23 Sep - 30 Sep	easyJet	direct
21 Sep - 25 Sep	easyJet	direct
22 Sep - 30 Sep	easyJet	direct
22 Sep - 25 Sep	easyJet	direct
23 Sep - 26 Sep	easyJet	direct
23 Sep - 28 Sep	easyJet
21 Sep - 30 Sep	easyJet	direct
30 Sep - 05 Oct	easyJet
29 Sep - 06 Oct	easyJet	direct
29 Sep - 02 Oct	easyJet	direct
30 Sep - 05 Oct	easyJet	direct
25 Sep - 22 Oct	easyJet	direct
30 Sep - 03 Oct	easyJet	direct
28 Sep - 05 Oct	Wizz Air Malta
21 Sep - 05 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 103€

Return flights