AirHint found the following cheapest return flights from Klagenfurt (KLU) to Cologne (CGN) in August 2025 (see full year).

Return flights

29 Aug - 01 Sep	Eurowings	direct
04 Aug - 01 Sep	Eurowings	direct
15 Aug - 22 Aug	Eurowings	direct
22 Aug - 01 Sep	Eurowings	direct
15 Aug - 18 Aug	Eurowings	direct
15 Aug - 25 Aug	Eurowings
07 Aug - 18 Aug	Ryanair
29 Aug - 03 Sep	Eurowings
04 Aug - 15 Aug	Eurowings	direct
22 Aug - 25 Aug	Eurowings
04 Aug - 11 Aug	Eurowings
04 Aug - 08 Aug	Eurowings	direct
15 Aug - 25 Aug	Eurowings	direct
01 Aug - 04 Aug	Eurowings
22 Aug - 04 Sep	Eurowings

Also check the deals for one-way flights from Klagenfurt to Cologne in August.

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 Klagenfurt to Cologne in August from $185

Return flights