https://www.quecochemecompro.com/opiniones/guia-rapida-como-contactar-con-un-representante-de-atencion-al-cliente-de-delta/
https://feel-free-to-ask.elevio.help/en/articles/8-different-methods-for-reaching-expedia-support-phone-chat-and-email
https://www.quecochemecompro.com/opiniones/como-contactar-directamente-a-un-agente-de-united-airlines/
https://www.quecochemecompro.com/opiniones/como-contactar-con-el-servicio-de-atencion-al-cliente-de-delta-airlines-1/
https://www.quecochemecompro.com/opiniones/como-comunicarse-con-un-representante-de-atencion-al-cliente-de-delta-airlines/
https://www.djangobooks.com/forum/discussion/19940/volaris-telefono-mexico-como-llamar-a-servicio-al-cliente-volaris/p1?new=1
https://www.quecochemecompro.com/opiniones/servicio-de-atencion-al-cliente-de-united-airlines-como-hablar-con-un-agente/
https://community.fmca.com/topic/21661-how-to-contact-frontier-airlines-customer-service-by-phone-a-complete-guide/