In general, when booking your flight to Geneva, January is the cheapest month on average.
Most flyers found that booking flight tickets 55 days in advance of their planned departure date is, on average, the best time to get cheap flights to Geneva.
From most locations, the cheapest flights to Geneva are found on a Wednesday. Booking a Sunday departure is usually the most expensive.
On average you can find the best deals on plane tickets to Geneva when looking for flights with morning departure times.