https://official-unitedairlines.freshdesk.com/support/solutions/articles/1130000003908-21-ways-to-reach-united-airlines-customer-service-by-phone-number-chat-and-email-options-a-step-by-step-guide https://official-unitedairlines.freshdesk.com/en/support/solutions/articles/1130000003915-ways-to-communicate-directly-with-united-airlines-customer-service-via-phone-chat-and-email-step-by-step-helpful-guide https://deltaairline-helpscenters.freshdesk.com/support/solutions/articles/1120000003489-ways-to-communicate-directly-with-delta-airlines-customer-service-via-phone-chat-and-email-step-by-step-helpful-guide https://officials-americanairlines.freshdesk.com/support/solutions/articles/1130000003917-ways-to-communicate-directly-with-american-airlines-customer-service-via-phone-chat-and-email-step-by-step-helpful-guide