https://www.lowfaresfinder.com/blogs/can-you-cancel-a-klm-flight-and-get-money-back Quick Changes, No Worries: Mastering KLM's 24-Hour Cancellation Process KLM 24-hour cancellation window, enabling travelers to modify or cancel bookings within the first 24 hours of purchase without incurring fees. This policy offers flexibility and peace of mind, accommodating unforeseen changes in travel plans while prioritizing customer satisfaction and convenience.