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

Return flights

08 Sep - 17 Sep	easyJet
18 Sep - 25 Sep	KLM
03 Sep - 11 Sep	KLM
25 Sep - 29 Sep	Lufthansa
17 Sep - 27 Sep	easyJet
01 Sep - 08 Sep	easyJet
09 Sep - 14 Sep	easyJet
08 Sep - 14 Sep	easyJet
03 Sep - 07 Sep	easyJet

Also check the deals for one-way flights from Glasgow 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 Glasgow to Ljubljana in September from 187€

Return flights