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

Return flights

12 Sep - 19 Sep	Aer Lingus
07 Sep - 18 Sep	Icelandair
07 Sep - 15 Oct	Aer Lingus
06 Sep - 20 Sep	Icelandair
09 Sep - 16 Sep	Scandinavian Airlines
08 Sep - 15 Sep	Icelandair
17 Sep - 24 Sep	Icelandair
13 Sep - 18 Sep	Frontier Airlines
11 Sep - 18 Sep	Aer Lingus
09 Sep - 23 Sep	Icelandair
01 Sep - 12 Sep	Lufthansa	direct
07 Sep - 15 Oct	Lufthansa	direct
29 Sep - 13 Oct	Condor
16 Sep - 14 Oct	Delta
16 Sep - 01 Oct	Delta
16 Sep - 01 Oct	Lufthansa	direct
29 Sep - 13 Oct	United	direct

Also check the deals for one-way flights from Denver 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 Denver to Munich in September from 513€

Return flights