Do you need to cancel your Singapore airlines booking? Understanding Singapore Airlines flight cancellation policy can play a huge role in your travel experience and make for a much smoother trip in case you are traveling with the Singapore airlines. Under this policy, If the itinerary includes a Singapore Airlines operated flight, and the ticket was issued on or before 24 hours before scheduled departure and the passenger is unable to travel due to illness, death, or other circumstances beyond their control, the ticket can be canceled without penalty.