lalali 11 Ways to Call KLM Customer Service via Phone, Email, or Chat Options: Full Steps 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 18, 2025