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

Return flights

08 Jul - 23 Jul	Turkish Airlines
30 Jul - 06 Aug	American Airlines
08 Jul - 22 Jul	Turkish Airlines
31 Jul - 08 Aug	Icelandair
25 Jul - 11 Aug	Frontier Airlines
04 Jul - 11 Jul	Air Canada
18 Jul - 28 Jul	Frontier Airlines
17 Jul - 27 Jul	Frontier Airlines
29 Jul - 05 Aug	Icelandair
23 Jul - 26 Jul	Alaska Airlines
30 Jul - 06 Aug	SWISS	direct
03 Jul - 10 Jul	Frontier Airlines
21 Jul - 28 Jul	Icelandair
31 Jul - 07 Aug	Icelandair
04 Jul - 19 Jul	Alaska Airlines
25 Jul - 01 Aug	Icelandair
27 Jul - 03 Aug	Icelandair
25 Jul - 11 Aug	SWISS	direct
18 Jul - 28 Jul	SWISS	direct

Also check the deals for one-way flights from Denver to Zurich 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 Zurich in July from $757

Return flights