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

Return flights

26 Sep - 03 Oct	Eurowings	direct
05 Sep - 05 Sep	Eurowings	direct
18 Sep - 21 Sep	Wizz Air UK
24 Sep - 01 Oct	Wizz Air UK
26 Sep - 28 Sep	Eurowings
19 Sep - 21 Sep	Wizz Air UK
12 Sep - 19 Sep	Eurowings	direct
26 Sep - 28 Sep	Eurowings	direct
18 Sep - 19 Sep	Wizz Air UK
07 Sep - 14 Sep	Eurowings	direct
22 Sep - 26 Sep	Eurowings
12 Sep - 15 Sep	Eurowings
29 Sep - 01 Oct	Ryanair
29 Sep - 02 Oct	Ryanair
28 Sep - 02 Oct	Ryanair

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

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 Prague to Cologne in September from $139

Return flights