Singapore Airlines (SIA) doesn't appear to have a public, walk-in office in Geneva, but you can manage bookings, get support, and find flight info via their Singapore Airlines Help Centre for the UK (use +1-866-829-1086) or their global support, and they fly from nearby Zürich (ZRH). For direct Geneva assistance, try their online chat or look for their local GVA (Geneva Airport) handling agent's details, as their main point of contact is typically through their website or call centers. Jauntlet.comhttps://jauntlet.com/