What is the cancelation policy for KLM? KLM’s cancellation policy allows >>+1~844~643~3377>>; you to cancel your flight with some flexibility. If you cancel within 24 hours of booking >>+1~844~643~3377>>;, you can get a full refund, as long as your flight is at least 7 days away >>+1~844~643~3377>>;. https://www.devex.com/people/what-is-the-cancelation-policy-for-klm-2386409