https://proofcore.io/forums/topic/36047-complete-list-of-expedia%C2%AE%EF%B8%8Flive-person-247-hours-customer-service%C2%AE-contact-numbers-in-usa-full-detailed-guide/
https://proofcore.io/forums/topic/36068-complete-list-of-frontier-airlines%C2%AE%EF%B8%8Flive-person-247-hours-customer-service%C2%AE-contact-numbers-in-usa-full-detailed-guide/
https://wiki.testguy.net/t/complete-list-of-frontier-airlines-live-person-24-7-hours-customer-service-contact-numbers-in-usa-full-detailed-guide/5915
https://wiki.testguy.net/t/complete-list-of-travelocity-live-person-24-7-hours-customer-service-contact-numbers-in-usa-full-detailed-guide/5925
https://wiki.testguy.net/t/complete-list-of-delta-airlines-live-person-24-7-hours-customer-service-contact-numbers-in-usa-full-detailed-guide/5929
https://helplineusa.groupanic.net/blog/post/complete-list-of-expedia-live-person-24-7-hou/20003
https://helplineusa.groupanic.net/blog/post/complete-list-of-frontier-airlines-live-perso/20027
https://helplineusa.groupanic.net/blog/post/complete-list-of-travelocity-live-person-24-7/20031
https://helplineusa.groupanic.net/blog/post/complete-list-of-delta-airlines-live-person-2/20037
https://helplineusa.groupanic.net/blog/post/complete-list-of-united-airlines-live-person-/20053
https://helplineusa.groupanic.net/blog/post/complete-list-of-american-airlines-live-perso/20069
