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

Return flights

30 Jul - 15 Aug	British Airways
27 Jul - 13 Aug	British Airways
30 Jul - 15 Aug	SWISS	direct
30 Jul - 13 Aug	Delta
21 Jul - 28 Jul	Frontier Airlines
29 Jul - 12 Aug	Hawaiian Airlines
30 Jul - 13 Aug	SWISS	direct
27 Jul - 12 Aug	Delta
25 Jul - 11 Aug	Frontier Airlines
07 Jul - 14 Jul	Hawaiian Airlines
23 Jul - 26 Jul	Frontier Airlines
07 Jul - 10 Aug	Condor
22 Jul - 29 Jul	Icelandair
06 Jul - 13 Jul	Frontier Airlines
26 Jul - 02 Aug	Icelandair
04 Jul - 11 Jul	Frontier Airlines
24 Jul - 31 Jul	United
21 Jul - 28 Jul	SWISS	direct
08 Jul - 23 Jul	SWISS
04 Jul - 11 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 532€

Return flights