https://www.scienceforums.com/topic/97267-expedited09-ways-to-speak-to-someone-at-united-airlines-%E2%80%93-full-step-by-step-guide/
https://club.autodoc.co.uk/forum/topic/24-7-qatar-airlines-customer-care-service-how-to-reach-an-agent-in-minutes
https://konfhub.com/sixty-9-ways-to-call-to-live-agent-at-delta-airlines-a-complete-step-by-step-guide
https://www.scienceforums.com/topic/97266-immediate08-ways-to-speak-to-a-live-agent-at-united-airlines-%E2%80%93-full-step-by-step-guide/
https://konfhub.com/twenty-3-ways-to-talk-to-someone-at-delta-airlines-via-phone-email-or-chat-a-step-by-step-guide