Cheapest return flights from Belfast to Ljubljana in September from $248

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

Return flights

22 Sep - 25 Sep Ryanair
26 Sep - 29 Sep Aer Lingus

Also check the deals for one-way flights from Belfast to Ljubljana in September.

Skyscanner

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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