https://community.otofonix.com/forums/discussion/thirteen-ways-to-call-to-live-agent-at-delta-airlines-through-contact-options-a/
https://community.otofonix.com/forums/discussion/fifteen-ways-to-reach-to-contact-a-live-agent-at-delta-airlines-a-rapid-fire-gu/
https://community.otofonix.com/forums/discussion/fourteen-ways-to-speak-to-live-agent-at-delta-airlines/
https://deepsleeep.com/six-hacks-to-connect-with-a-live-representative-at-frontier-airlines-frl6/
https://deepsleeep.com/five-easy-steps-to-speak-to-a-live-person-at-frontier-airlines-frl5/