https://nbss.edu/wp-content/uploads/formidable/12/Complete-List-of-United-24-7-Customer-Service-Full-Brief-Guide.pdf

https://www.osn.iaa.csic.es/sites/default/files/solicitudes/complete-list-of-southwest-airlines-usa-customer-service-contact-numbers.pdf

http://fbrnvolunteers.org/forms/data/form_7675/files/element_22_fd39ee57c2415127f2e52905f3f7912b-Full-List-of-American-Customer-Service-24-7-Support-Numbers-a-Brief-Guide.pdf.tmp

https://www.osn.iaa.csic.es/sites/default/files/solicitudes/alaska-airlines-customer-service-contact-numbers-in-usa-full-detailed-guide.pdf

https://www.osn.iaa.csic.es/sites/default/files/solicitudes/complete-guide-of-air-france-airlines-customer-service-representatives-.pdf

http://fbrnvolunteers.org/forms/data/form_7675/files/element_22_fdb54c3d9905ac948daf0ab00a6f8c95-contact-methods-aeromexico-airlines-customer-service-phone-number-an-all-inclusive-guide.pdf.tmp

https://www.osn.iaa.csic.es/sites/default/files/solicitudes/jetblue-airlines-customer-service-contact-numbers-in-usa-full-detailed-guide_1.pdf

http://fbrnvolunteers.org/forms/data/form_7675/files/element_22_fdb54c3d9905ac948daf0ab00a6f8c95-full-list-of-air-canada-airlines-tm-customer-usa-direct-contact-numbers-live-all-in-guide.pdf.tmp

https://forum.hestiacp.com/t/full-list-of-official-american-airlines-customer-service-24-7-live-person-support-numbers-a-complete-guide/20116

https://www.osn.iaa.csic.es/sites/default/files/solicitudes/complete-list-of-delta-airlines-usa-customer-service-contact-numbers.pdf