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

Return flights

04 Jul - 17 Jul	SWISS
31 Jul - 14 Aug	United	direct
08 Jul - 15 Jul	Turkish Airlines
19 Jul - 23 Jul	Turkish Airlines
09 Jul - 14 Jul	Turkish Airlines
18 Jul - 22 Jul	Turkish Airlines
15 Jul - 26 Jul	Turkish Airlines
28 Jul - 06 Aug	Air Canada
24 Jul - 07 Aug	Brussels Airlines
24 Jul - 01 Aug	Brussels Airlines
25 Jul - 05 Aug	Brussels Airlines
11 Jul - 24 Jul	Frontier Airlines
07 Jul - 14 Jul	Turkish Airlines
21 Jul - 05 Aug	WestJet
25 Jul - 05 Aug	United	direct
04 Jul - 27 Jul	Air France
28 Jul - 04 Aug	Lufthansa
30 Jul - 06 Aug	United	direct
24 Jul - 07 Aug	Lufthansa	direct
24 Jul - 31 Jul	United	direct

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

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 July from $812

Return flights