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

Return flights

29 Dec - 24 Jan	Scandinavian Airlines
30 Dec - 24 Jan	Turkish Airlines
07 Dec - 27 Dec	TAP
15 Dec - 28 Dec	TAP
16 Dec - 28 Dec	TAP
30 Dec - 24 Jan	Brussels Airlines	direct
29 Dec - 24 Jan	Brussels Airlines	direct
21 Dec - 29 Dec	Icelandair
21 Dec - 30 Dec	Icelandair
17 Dec - 29 Dec	Aer Lingus
21 Dec - 28 Dec	Icelandair
17 Dec - 28 Dec	TAP
22 Dec - 29 Dec	Aer Lingus
15 Dec - 28 Dec	United	direct
14 Dec - 03 Jan	Lufthansa
27 Dec - 03 Jan	Scandinavian Airlines

Also check the deals for one-way flights from Washington to Geneva 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 Geneva in December from $530

Return flights