Mulla Ways to Reach KLM Airlines Customer Support Service via Phone: Step-by-Step Explained Guide To reach a live person at KLM Airlines customer service for support, you can call their 24/7 KLM Airlines Phone number hotline at 1*888*793*3403. OTA (Live Person) or 1-800-KLM Airlines 1*888*793*3403... Apr 15, 2025