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

Return flights

15 Aug - 22 Aug	Icelandair
19 Aug - 26 Aug	Icelandair
18 Aug - 25 Aug	Icelandair
17 Aug - 24 Aug	Icelandair
21 Aug - 28 Aug	Icelandair
18 Aug - 03 Sep	Icelandair
23 Aug - 30 Aug	Icelandair
25 Aug - 01 Sep	Icelandair
18 Aug - 03 Sep	SWISS	direct
18 Aug - 25 Aug	SWISS	direct
28 Aug - 04 Sep	Icelandair
30 Aug - 06 Sep	Icelandair
13 Aug - 19 Sep	SWISS	direct
08 Aug - 23 Aug	Turkish Airlines
13 Aug - 20 Aug	SWISS	direct
29 Aug - 06 Sep	SWISS
06 Aug - 15 Aug	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 509€

Return flights