Want to know about KLM flight cancellation policy? Online ticket cancellation for KLM flights has been made possible by KLM Airlines. Therefore, you may cancel your KLM ticket online if you don't need to travel on the set date and time, and it gives you excellent details in your booking confirmation. With KLM's fundamental guidelines or policies, you can cancel an airline ticket within a short period of time. You can contact KLM customer service regarding the KLM Airlines Cancellation policy at the KLM phone number +1-845-459-2806.