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

Return flights

13 Dec - 21 Dec	Aer Lingus
21 Dec - 18 Jan	Aer Lingus
21 Dec - 30 Dec	Aer Lingus
19 Dec - 18 Jan	Azores Airlines
21 Dec - 01 Jan	Aer Lingus
20 Dec - 18 Jan	Aer Lingus
19 Dec - 11 Jan	Aer Lingus
22 Dec - 02 Jan	United
20 Dec - 01 Jan	Aer Lingus
21 Dec - 02 Jan	United
25 Dec - 02 Jan	Air Canada
27 Dec - 03 Jan	Lufthansa

Also check the deals for one-way flights from Boston 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 Boston to Geneva in December from 427€

Return flights