To reach a live person at KLM Airlines customer service for support, you can call their 24/7 KLM Phone number hotline at +1-888-837-1575. OTA (Live Person) or 1-800-KLM +1-888-837-1575. You can also use the live chat feature on their website or reach out to them via email. https://www.greenbuildingadvisor.com/question/ways-to-call-klm-airlines-customer-service-by-phone-chat-and-email-a-complete-guide?discussion=new