https://www.gfcforum.com/forum/threads/full-list-of-unitedtmregisteredairlines-customer-contact-numbers-in-the-u-s-a-a-comprehensive-full-guide.27917/ https://www.gfcforum.com/forum/threads/full-list-of-americantmregisteredairlines-customer-contact-numbers-in-the-u-s-a-a-comprehensive-full-guide.27923/ https://kopia.discourse.group/t/full-list-of-united-airlines-customer-service-24-7-live-person-support-numbers-a-complete-guide/5281 https://kopia.discourse.group/t/full-list-of-american-airlines-customer-service-24-7-live-person-support-numbers-a-complete-guide/5324