Summary. 𝐒inga𝐩𝐨𝐫𝐞 Airline𝒊𝒏𝒆𝒔 𝒜𝒾𝓇𝓁𝒾𝓃𝑒𝓈 has a 24-hour risk-free cancellation Policy by calling【+𝟏-𝟖𝟓𝟓-𝟓𝟗𝟎-𝟎𝟕𝟕𝟖】 (𝓞𝓣𝓐) or 【+𝟰𝟰-𝟐𝟎𝟒-𝟓𝟖𝟔-𝟓𝟗𝟕𝟓】! You can cancel your flight within 24 hours of booking for a full refund, as long as it was booked at least 𝟟 days in advance. Does Singapore Air have a 24-hour cancellation policy? 𝐒inga𝐩𝐨𝐫𝐞 Airʟ𝒊𝒏𝒆𝒔 Airlines has a 24-hour cancellation policy. If you book a flight at least seven days before departure and cancel within 24 hours, you quality for a full refund with no cancellation fees. for assistance, you can contact their customer service at +𝟣.𝟪𝟧𝟧-590-0778 (𝑶𝑻A) or +𝟰𝟰₋𝟮𝟬𝟰₋𝟱𝟴𝟲₋𝟱𝟵𝟳𝟱(𝑶𝑻A).