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

Return flights

06 Dec - 27 Dec	Scandinavian Airlines
25 Dec - 09 Jan	Scandinavian Airlines
03 Dec - 31 Dec	Aer Lingus
26 Dec - 09 Jan	SWISS	direct
05 Dec - 18 Dec	United	direct
25 Dec - 09 Jan	SWISS	direct
05 Dec - 17 Dec	United
27 Dec - 02 Jan	Scandinavian Airlines
27 Dec - 01 Jan	Aer Lingus
20 Dec - 30 Dec	Icelandair
19 Dec - 30 Dec	Aer Lingus
23 Dec - 27 Dec	TAP
27 Dec - 03 Jan	Scandinavian Airlines
06 Dec - 27 Dec	SWISS	direct
22 Dec - 03 Jan	Icelandair
20 Dec - 03 Jan	Icelandair
23 Dec - 03 Jan	Austrian Airlines
21 Dec - 03 Jan	Icelandair
03 Dec - 31 Dec	United	direct
19 Dec - 30 Dec	SWISS	direct

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 $508

Return flights