Depending on the kind of ticket and pricing class, Singapore Airline cancellation differs based on the type of ticket. In general, cancellations for refundable tickets can be done with little to no penalty and travellers may get a full or partial refund. The airline may give a credit for future travel, less any relevant costs, for non-refundable tickets, which normally do not grant refunds. Before cancelling your ticket, it is very important to read the exact terms and restrictions.