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

Return flights

30 Aug - 06 Sep	Icelandair
18 Aug - 26 Aug	Icelandair
22 Aug - 29 Aug	Icelandair
18 Aug - 25 Aug	Icelandair
20 Aug - 27 Aug	Icelandair
28 Aug - 04 Sep	Icelandair
24 Aug - 31 Aug	Icelandair
16 Aug - 23 Aug	Icelandair
27 Aug - 06 Sep	Icelandair
13 Aug - 20 Aug	British Airways
04 Aug - 20 Aug	British Airways
29 Aug - 05 Sep	Icelandair
06 Aug - 13 Aug	British Airways
14 Aug - 21 Aug	Icelandair
29 Aug - 06 Sep	Icelandair
27 Aug - 03 Sep	SWISS	direct
29 Aug - 05 Sep	SWISS	direct

Also check the deals for one-way flights from Denver to Zurich in August.

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 August from $403

Return flights