https://www.lowfaresfinder.com/blogs/can-you-cancel-a-klm-flight-and-get-money-back KLM 24 Hours Cancellation Policy: KLM Airlines offers a 24-hour cancellation policy, allowing passengers to cancel or modify their bookings within the first 24 hours without incurring additional charges. This feature provides travelers with a grace period to reconsider or adjust their plans shortly after making reservations, enhancing overall flexibility and customer satisfaction.