To cancel your Singapore Airlines flight, you generally need to give a minimum of 24 hours’ notice before departure. This timeframe allows you to avoid cancellation penalties and could provide a chance for a refund, depending on your ticket type. Be sure to check your fare conditions as they can vary significantly. If you’re uncertain about the process, visiting the Singapore Airlines website or contacting customer service can offer clarity and guidance. If you have further questions, don’t hesitate to connect with them for detailed assistance.