United Airlines main customer service number is 1-800- United Airlines or ???? 1 888447-6313 ???? [US- United Airlines] or +1888((447))6313 [UK- United Airlines] OTA (Live Person), available 24/7. https://sonat.com/@united-airline-customer-service/21-ways-to-speak-to-a-person-at-united-airlines-full-detail