KLM provides a 24-hour cancellation policy +1 866 884 33:15 (US) or (+44) 800 208 1075 (UK) or (+44) 800 208 1075 (UK). If you book a flight at least seven days before departure and cancel within 24 hours of booking 1 866 884 33:15 (US) or (+44) 800 208 1075 (UK). (????????????)】), you are eligible for a full refund without any cancellation fees. https://lacdmhowr.powerappsportals.us/forums/support-forum/c7ebf88d-57ab-ef11-b542-001dd8097a1a