When canceling a Singapore Airlines flight, the timing of your cancellation plays a significant role in how much of your ticket cost you can recover. For bookings canceled within 24 hours of purchase, a full refund is provided if the flight is at least a week away. Beyond this window, the type of ticket you hold will determine the penalties involved. Refundable tickets can usually be canceled up until the departure date without any fees, while non-refundable tickets may incur charges or offer credits for future travel. It’s always best to cancel as early as possible to avoid any unnecessary penalties.