https://www.devex.com/people/free-cancellation-with-sq-24-hours-does-singapore-airlines-have-free-24-hour-cancellation-1973172
https://www.devex.com/people/free-cancellation-with-sq-24-hours-does-singapore-airlines-have-free-24-hour-cancellation-1973172https://www.devex.com/people/free-cancellation-with-sq-24-hours-does-singapore-airlines-have-free-24-hour-cancellation-1973172