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

Return flights

03 Dec - 10 Dec	Icelandair
31 Dec - 11 Jan	Scandinavian Airlines
28 Dec - 16 Jan	Royal Air Maroc
04 Dec - 11 Dec	Scandinavian Airlines
05 Dec - 07 Dec	Royal Air Maroc
28 Dec - 11 Jan	TAP
02 Dec - 03 Dec	TAP
28 Dec - 09 Jan	Aer Lingus
03 Dec - 04 Dec	Air Canada
15 Dec - 28 Dec	Frontier Airlines
31 Dec - 11 Jan	Brussels Airlines	direct
28 Dec - 16 Jan	Brussels Airlines	direct
28 Dec - 05 Jan	TAP
28 Dec - 09 Jan	Brussels Airlines	direct
28 Dec - 11 Jan	Brussels Airlines	direct
25 Dec - 04 Jan	Air Canada
04 Dec - 11 Dec	Brussels Airlines	direct
05 Dec - 07 Dec	SWISS	direct

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 $705

Return flights