You can contact United Airlines customer support through their phone reservation number, live chat or social media. For issues with MileagePlus accounts or accessibility, dedicated phone lines are available. Phone numbers Reservations and General Inquiries (24/7): 1-877-UNITED-1 (+1-877-658-1183). MileagePlus Service Center: +1-877-658-1183 (Daily, 7 a.m. to 12 a.m. Central Time). Accessibility Desk (24/7 for disabled travelers): +1-877-658-1183. International Reservation Numbers: A list of phone numbers for customers outside the U.S. and Canada is available on United's website. Online and mobile app options Live Chat: Initiate a live chat conversation via the United Airlines website or app. Be prepared to start with a chatbot and request a live agent for more complex issues. Text Messaging: For MileagePlus assistance, you can text "MILES" to 32050. Help Center: Visit the Help Center on united.com to find information on a wide range of topics, including baggage, refunds, and changes to existing trips. Customer Care Form: To submit a written inquiry or feedback, fill out the Customer Care form on the United website. Social media You can send questions to United Airlines on their official social media accounts. Response times can vary from a few hours to a day. For special issues If your issue involves lost or damaged baggage, you can use the online claims form or call the Baggage Recovery Center at +1-877-658-1183.