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

Return flights

18 Aug - 25 Aug	Icelandair
18 Aug - 22 Aug	Icelandair
24 Aug - 31 Aug	Icelandair
26 Aug - 02 Sep	Icelandair
28 Aug - 04 Sep	Icelandair
30 Aug - 06 Sep	Icelandair
20 Aug - 27 Aug	Icelandair
07 Aug - 25 Sep	Icelandair
27 Aug - 03 Sep	Delta
07 Aug - 30 Sep	Delta
13 Aug - 20 Aug	SWISS	direct
07 Aug - 29 Sep	Icelandair
06 Aug - 15 Aug	SWISS	direct
27 Aug - 03 Sep	SWISS	direct
04 Aug - 22 Sep	British Airways
04 Aug - 20 Aug	SWISS	direct
08 Aug - 23 Aug	SWISS
10 Aug - 17 Aug	United
08 Aug - 15 Aug	United
31 Aug - 07 Sep	United

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 405€

Return flights