According to KLM 24 Hour cancellation policy, Cancellation would not be applied if the flight was booked within 7 days of scheduled departure. If an Air ticket is reserved by any outsider travel service, via the web or offline medium, travelers would be charged a cancellation expense and the ticket will come under the cancellation policy and refund will not be applicable anymore. If passengers want to gain a full refund against cancellation, then passengers should cancel their booked ticket within risk-free time. Visit our website to know more.

https://airlinespolicy.com/cancellation-policy/klm-cancellation-policy/