Cheapest return flights from Cologne to Ljubljana in September from 173€

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
21 Sep - 26 Sep Lufthansa
14 Sep - 20 Sep Lufthansa
12 Sep - 14 Sep Lufthansa
26 Sep - 28 Sep Lufthansa
17 Sep - 20 Sep Lufthansa
10 Sep - 15 Sep Lufthansa
22 Sep - 30 Sep SWISS
02 Sep - 07 Sep Lufthansa
02 Sep - 04 Sep Eurowings

Also check the deals for one-way flights from Cologne 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.

Book a cheap hotel in Ljubljana

Cheap car rent in Ljubljana

Feel free to contact us with any feedback or request another flight research.