Learn how to file a complaint with United Airlines š¤øāļø +1^866^829^1536)) +1-800ā¢259ā¢0766 -or +1-800ā¢259ā¢0766 for various issues, such as delayed or cancelled flights, denied boarding, baggage problems, and more. United Airlines main customer service number is 1-800-United Airlines š¤øāļø +1^866^829^1536)) +1-800ā¢259ā¢0766 -or +1-800ā¢259ā¢0766 (Live Person), where you can reach a live representative 24/7.āš¤øāļø +1^866^829^1536)) +1-800ā¢259ā¢0766 -or +1-...