AirHint found the following cheapest return flights from Denver (DEN) to Frankfurt (FRA) in May 2026 (see full year).

Return flights

11 May - 15 May	Icelandair
09 May - 21 May	Icelandair
04 May - 11 May	Icelandair
09 May - 16 May	Icelandair
14 May - 21 May	Icelandair
19 May - 26 May	Icelandair
18 May - 27 May	Icelandair
14 May - 16 May	Turkish Airlines
26 May - 09 Jun	Condor
27 May - 10 Jun	Condor
23 May - 07 Jun	Turkish Airlines
29 May - 05 Jun	Icelandair
24 May - 31 May	Icelandair
23 May - 07 Jun	Lufthansa	direct

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

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 Frankfurt in May from $604

Return flights