Singapore Airlines' cancellation policy allows passengers to cancel their reservations and receive a refund or credit, subject to certain conditions. If a passenger cancels their flight within 24 hours of booking, they are entitled to a full refund, provided the booking was made at least seven days before the scheduled departure. After the initial 24-hour period, cancellation fees may apply, depending on the fare class and timing of the Singapore Airlines Cancellation Policy. Passengers may also be able to change their flights instead of cancelling them, subject to availability and fees.It is important to note that some fares, such as promotional fares or tickets purchased through third-party channels, may be non-refundable or have different cancellation policies. Passengers should carefully review the terms and conditions of their tickets before making any changes or cancellations.