In general, when looking for the cheapest flight to Geneva, try to choose a flight departing in November for the best deal.
From most locations, booking your flights to Geneva around 36 days prior to your departure date finds the best deals.
From most locations, the cheapest flights to Geneva are found on a Wednesday. Booking a Saturday departure is usually the most expensive.
Generally, when visiting Geneva, evening flights represent the best value. midday flights are likely to have higher prices.