Reaching KLM Airlines customer service at +1 (833) 520-4715 helps you quickly handle bookings, cancellations, refunds, and technical issues with 24/7 support. You can connect with a live agent by calling, using the website’s live chat, or accessing help through the mobile app. KLM’s cancellation and refund policies vary by fare type, with fees typically applied and refunds issued based on eligibility. Passengers are advised to cancel at least 24 hours before departure to avoid additional charges. Toll Free Number +1 (833) 520-4715