https://www.scienceforums.com/topic/97223-a-ways-to-talk-to-a-live-person-at-frontier-airlines-phone-email-and-chat-the-complete-guide/
https://www.scienceforums.com/topic/97270-fleet05-ways-to-talk-to-a-united-agent-via-phone-email-or-chat-%E2%80%93-instant-help-guide/
https://www.scienceforums.com/topic/97214-3-ways-to-contact-live-person-at-frontier-airlines-phone-email-and-chat-your-ultimate-instruction-manual/
https://www.scienceforums.com/topic/97269-quick10-ways-to-call-and-connect-with-a-live-person-at-united%C2%AE-airlines-instantly/