Https://www.certcommunity.org/forum/topic/26089-full-list-of-united-airlines-customer%E2%84%A2-service-usa-contact-numbers-a-step-by-step-guide/ https://www.certcommunity.org/forum/topic/26089-full-list-of-united-airlines-customer%E2%84%A2-service-usa-contact-numbers-a-step-by-step-guide/ https://www.certcommunity.org/forum/topic/26089-full-list-of-united-airlines-customer%E2%84... https://www.certcommunity.org/forum/topic/26089-full-list-of-united-airlines-customer%E2%84%A2-service-usa-contact-numbers-a-step-by-step-guide/