KLM cancellation policy allows passengers to cancel their flights under certain conditions. If you need to cancel a flight, you can do so by contacting their customer service at their toll-free number Or Toll-Free The specifics of the policy, including potential fees or refunds, depend on the type of ticket purchased and how close to the departure date the cancellation is made. It’s recommended to review your fare conditions or speak directly with a customer service representative for detailed information tailored to your situation.