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/15-ways-to-call-how-can-i-talk-to-someone-at-united-airlines-full-guide