https://officialunitedairlineshelp.kb.help/ways-to-call-united-airlines-customer-service-direct-via-phone-email-or-chatcomplete-help-desk-and-user-guide/
https://officialunitedairlineshelp.kb.help/ways-to-call-united-airlines-customer-service-via-phone-email-or-chat-options-total-assistance-and-customer-help-guide/
https://officialunitedairlineshelp.kb.help/ways-to-reach-united-airlines-customer-service-direct-through-phone-email-or-chatcomprehensive-help-and-customer-assistance/
https://officialunitedairlineshelp.kb.help/ways-to-reach-united-airlines-customer-service-via-phone-email-or-chat-optionstotal-customer-service-and-user-handbook/