https://regions-and-cities.europa.eu/sites/default/files/webform/multimedia_center/_sid_/expedia-customer-service.pdf

https://official-expedia-helpcenter.fider.io/posts/2/19-ways-to-get-expedia-r-assistance-speak-to-a-real-person-for-urgent-help

https://www.scienceforums.com/topic/97363-%F0%9F%9A%80-29-no-fail-strategies-to-contact-a-live-person-at-delta%C2%AE-%E2%80%93-go-to-guide-for-fast-help/

https://www.scienceforums.com/topic/97362-%F0%9F%93%8B-13-hassle-free-paths-to-reach-a-live-agent-at-delta-airlines-by-phone-chat-or-email-%E2%80%93-stepwise-map/

https://portaly.cc/official-Air-France

https://www.scienceforums.com/topic/97361-%E2%9A%A1-09-high-speed-options-to-talk-to-a-live-agent-at-delta%C2%AE-%E2%80%93-instant-contact-blueprint/

https://www.scienceforums.com/topic/97360-%F0%9F%94%90-verified-4-ways-to-call-delta-airlines-and-get-a-live-agent-%E2%80%93-insider-shortcut-guide/

https://www.scienceforums.com/topic/97359-%F0%9F%93%9E-06-proven-steps-to-instantly-connect-with-someone-at-delta%C2%AE-airlines-%E2%80%93-full-explainer/

https://www.scienceforums.com/topic/97357-%E2%9C%88%EF%B8%8F-top-notch-4-techniques-to-speak-with-a-live-person-at-delta-airlines-%E2%80%93-ultimate-access-tips/

https://www.scienceforums.com/topic/97501-15-ways-to-contact-to-live-agent-at-frontier%E2%84%A2%EF%B8%8F-airlines-usa%E2%84%A2-a-step-by-step-guide/