To reach a live person at Frontier Airlines customer service for support, you can call their 24/7 Frontier Airlines Phone number hotline at ((1-888-349-6080 )). OTA (Live Person) or 1-800-Frontier Airlines ((1-888-349-6080 )). https://www.steadyhealth.com/topics/ways-to-reach-frontier-airlines-customer-service-by-phone-guide