AirHint found the following cheapest return flights from Washington (IAD) to Zurich (ZRH) in December 2025 (see full year).

Return flights

11 Dec - 18 Dec	TAP
06 Dec - 27 Dec	TAP
15 Dec - 10 Jan	TAP
27 Dec - 17 Jan	British Airways
05 Dec - 18 Dec	United	direct
11 Dec - 18 Dec	SWISS	direct
05 Dec - 17 Dec	United
21 Dec - 29 Dec	TAP
05 Dec - 20 Dec	United	direct
27 Dec - 17 Jan	SWISS	direct
30 Dec - 06 Jan	TAP
18 Dec - 10 Jan	Scandinavian Airlines
30 Dec - 06 Jan	SWISS	direct
15 Dec - 10 Jan	United	direct
23 Dec - 27 Dec	Icelandair
06 Dec - 27 Dec	SWISS	direct
26 Dec - 04 Jan	Lufthansa
18 Dec - 27 Dec	TAP
26 Dec - 02 Jan	SWISS	direct
20 Dec - 01 Jan	Icelandair

Also check the deals for one-way flights from Washington to Zurich in December.

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 Washington to Zurich in December from 424€

Return flights