https://aleut-international.org/topic/full-list-of-delta-customer-service-contact-numbers-in-the-usa/ https://www.sa-mp.ro/forums/topic/41466-%F0%9D%90%B9%F0%9D%92%B0%F0%9D%90%BF%F0%9D%90%BF%E2%84%A2-247%E2%84%A2-list-of-%E2%89%8Bcopa%E2%84%A2-airways-customer-support%C2%AE-%E2%80%93-numbers-a-comprehensive-step-by-step-guide/ https://aleut-international.org/topic/full-list-of-avianca-customer-service-contact-numbers-in-the-usa/