https://www.lowfaresfinder.com/blogs/can-you-cancel-a-klm-flight-and-get-money-back KLM 24-Hour Cancellation Policy: KLM generally offers a 24-hour cancellation policy, allowing passengers to cancel their bookings within 24 hours of purchase without facing cancellation fees. This provides flexibility for travelers who need to make last-minute changes and ensures a risk-free window for modifying or canceling reservations.