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

Return flights

22 Jul - 29 Jul	Ryanair
21 Jul - 28 Jul	Eurowings
24 Jul - 01 Aug	Ryanair
21 Jul - 28 Jul	Eurowings	direct
25 Jul - 28 Jul	Eurowings
25 Jul - 28 Jul	Eurowings	direct
23 Jul - 24 Jul	Ryanair
19 Jul - 21 Jul	Ryanair
24 Jul - 27 Jul	Ryanair

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

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 July from $251

Return flights