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https://www.scienceforums.com/topic/96877-ninety-seven-ways-to-contact-how-can-i-speak-to-someone-at-air-canada-airlines-via-callchator-email/

https://www.scienceforums.com/topic/95914-19-easy-ways-to-contact-british-airways-%C2%AE%EF%B8%8F-usa-contact-numbers-%E2%80%93-the-complete-guide/

https://regions-and-cities.europa.eu/sites/default/files/webform/multimedia_center/_sid_/aeromexico-%C2%BFcomo-hablar-con-una-persona-en-aeromexico.pdf

https://www.scienceforums.com/topic/96976-how-to-call-to-someone-at-frontier-airlines-now-the-complete-guide/

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https://club.autodoc.co.uk/forum/topic/direct-ways-to-speak-to-qatar-airways-customer-support-instant-help