If your Singapore Airlines ticket is scheduled to depart after 31 March 2024 and is issued between 5. Cancel Singapore Airlines flight Your ticket is not covered by our travel cancellation policy. However, you are entitled to free changes to your travel dates. You can cancel your trip by changing your travel dates through Manage Reservations. You can make unlimited changes to your travel dates before 9 January 2024 and all change fees will be waived. After 31 May 2024, you can enjoy a free one-time change of your travel dates. Please note that any change of date must be made within one year of the date of issue of your ticket and any other year.