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

Return flights

11 Dec - 15 Dec	Scandinavian Airlines
11 Dec - 14 Dec	Scandinavian Airlines
07 Dec - 14 Jan	Turkish Airlines
07 Dec - 13 Dec	TAP
05 Dec - 12 Dec	TAP
11 Dec - 18 Dec	Scandinavian Airlines
31 Dec - 10 Jan	Icelandair
27 Dec - 09 Jan	Air Canada
11 Dec - 18 Dec	SWISS	direct
27 Dec - 09 Jan	United	direct
17 Dec - 10 Jan	Icelandair
11 Dec - 15 Dec	SWISS	direct
11 Dec - 14 Dec	SWISS	direct
18 Dec - 10 Jan	Scandinavian Airlines
05 Dec - 18 Dec	United
05 Dec - 17 Dec	United
25 Dec - 01 Jan	Turkish Airlines
26 Dec - 01 Jan	Turkish Airlines
25 Dec - 03 Jan	Icelandair
19 Dec - 10 Jan	Frontier Airlines

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 416€

Return flights