Cheapest return flights from Cologne to Ljubljana in September from $221

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

Return flights

23 Sep - 30 Sep Lufthansa
16 Sep - 23 Sep Lufthansa
21 Sep - 28 Sep Lufthansa
19 Sep - 21 Sep Lufthansa
09 Sep - 19 Sep Lufthansa
14 Sep - 20 Sep Lufthansa
20 Sep - 04 Oct Lufthansa
05 Sep - 08 Sep Lufthansa
07 Sep - 12 Sep Lufthansa
18 Sep - 21 Sep SWISS
07 Sep - 14 Sep Lufthansa

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

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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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