Focomo Ways to Call KLM Customer Assistance via Phone, Chat, and Email: A Complete Guide To reach a live person at KLM customer service for support, you can call their 24/7 KLM Phone number hotline at 1*→888→793→3403. OTA (Live Person) or 1-800-KLM 1*→888→793→3403. You can also use the li... Apr 19, 2025