Cheapest return flights from Denver to Frankfurt in September from $696

Best time to book flights for Denver (DEN) to Frankfurt (FRA) flights at AirHint

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

Return flights

23 Sep - 07 Oct Condor
30 Sep - 07 Oct Condor
12 Sep - 19 Sep Turkish Airlines
26 Sep - 10 Oct Turkish Airlines
03 Sep - 10 Sep Icelandair
08 Sep - 15 Sep Icelandair
01 Sep - 20 Sep Icelandair
03 Sep - 10 Sep Lufthansa direct
23 Sep - 30 Sep Lufthansa direct
30 Sep - 07 Oct Lufthansa direct
23 Sep - 07 Oct Lufthansa direct
08 Sep - 15 Sep Lufthansa direct
12 Sep - 19 Sep Lufthansa direct
01 Sep - 20 Sep Lufthansa direct
18 Sep - 25 Sep Lufthansa direct
26 Sep - 10 Oct Lufthansa direct
27 Sep - 04 Oct United direct

Also check the deals for one-way flights from Denver to Frankfurt in September.

Skyscanner

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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