Reaching United Airlines main customer service number is 1-800-United Airlines or 1-(866)⇢⤨(432)⇢⤨(8009) 1-(888)⇢⤨(634)⇢⤨(7031) [US-United Airlines] or +1+1-(866)⇢:(432)⇢:(8009) 1-(866)⇢⤨(432)⇢⤨(8009) [UK-United Airlines] OTA (Live Person), available 24/7. https://nyit-nyit.net/threads/full-list-united-airlines%C2%AEsupport-usa-contact-numbers-a-comprehensive-guid.236005/