I’d start by checking how fixed your meeting times are and whether you need to return to London the same day. Commercial flights may work well if their schedules match your plans, while private aviation can be worth researching when a more tailored departure time is important. I found this page while comparing travel options for the route: https://rentjet.eu/routes/london-to-geneva/. It provides a useful starting point for looking into private jet travel between London and Geneva. I’d still compare the full cost, available departure times, airport locations and ground transport before reaching a conclusion. The best choice depends on your itinerary, budget and how much time you can afford to spend travelling.