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

Return flights

23 Sep - 24 Sep	Eurowings	direct
09 Sep - 09 Sep	Eurowings	direct
01 Sep - 10 Sep	Eurowings	direct
09 Sep - 16 Sep	Eurowings	direct
25 Sep - 29 Sep	Eurowings	direct
24 Sep - 24 Sep	Eurowings	direct
23 Sep - 30 Sep	Eurowings	direct
09 Sep - 12 Sep	Eurowings	direct
09 Sep - 10 Sep	Eurowings	direct
02 Sep - 03 Sep	Eurowings	direct
27 Sep - 11 Oct	Lufthansa	direct

Also check the deals for one-way flights from Cologne to Munich 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 Cologne to Munich in September from 119€

Return flights