Cheapest return flights from Denver to Frankfurt in December from $612

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

Return flights

10 Dec - 16 Dec Icelandair
10 Dec - 22 Dec Brussels Airlines
09 Dec - 16 Dec Scandinavian Airlines
06 Dec - 17 Dec Frontier Airlines
29 Dec - 12 Jan Condor
14 Dec - 22 Dec Air Canada
10 Dec - 23 Dec Icelandair
26 Dec - 09 Jan Turkish Airlines
01 Dec - 08 Dec British Airways
28 Dec - 13 Jan Frontier Airlines
13 Dec - 17 Jan Icelandair
07 Dec - 21 Dec Scandinavian Airlines
23 Dec - 17 Jan Frontier Airlines
26 Dec - 02 Jan Turkish Airlines
07 Dec - 14 Dec Icelandair
29 Dec - 12 Jan United direct
05 Dec - 12 Dec Icelandair
10 Dec - 02 Jan Frontier Airlines
26 Dec - 03 Jan Frontier Airlines
31 Dec - 07 Jan Lufthansa

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

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