https://discourse.maas.io/t/18-full-list-of-delta-airlines-customer-service-care-contact-numbers-in-usa/13364
https://gametalk.tv/t/p-r-o-v-e-n-delta-airlines-customer-service-full-complete-support-guide/3185
https://gametalk.tv/t/delta-airlines-customer-usa-contact-numbers-an-official-resource-guide/3187
https://gametalk.tv/t/t-al-l-delta-airlines-support-customer-service-usa-contact-numbers/3198
 
 
https://gametalk.tv/t/p-r-o-v-e-n-united-airlines-customer-service-full-complete-support-guide/3215
https://gametalk.tv/t/united-airlines-customer-usa-contact-numbers-an-official-resource-guide/3212
https://gametalk.tv/t/t-al-l-united-airlines-support-customer-service-usa-contact-numbers/3194
 
 
https://discourse.salome-platform.org/t/complete-list-of-delta-airlines-customer-services-u-s-contact-numbers/2004
https://discourse.salome-platform.org/t/delta-airlines-customer-service-usa-contact-numbers-guide/2388