Does SingaporeAir have a 24-hour cancellation policy? If you cancel within 24 hours of making your order, Singapore Airlines will refund you if you call us at +????-????????????-????????????-???????????????? (US) or +(+44) 800 208 1075 (UK). You'll get your money back in full right away. Depending on your fare type, fees can be applicable after this time. https://community.smartsheet.com/profile/204919/SIA_Cancel