https://www.devex.com/people/como-hablar-con-un-agente-de-frontier-airlines-2194785

https://www.devex.com/people/como-hablar-con-un-agente-de-frontier-airlines-2194783

https://www.devex.com/people/como-hablar-con-un-agente-de-frontier-airlines-2194777

https://forum.woimortal.com/forum/community/discussions/258443-%C2%BFc%C3%B3mo-hablar-con-jetblue-airlines-por-tel%C3%A9fono-atenci%C3%B3n-al-cliente

https://www.devex.com/people/como-hablar-con-un-agente-de-frontier-airlines-2194766

https://www.devex.com/people/can-i-cancel-a-flight-with-united-and-get-my-money-back-2194713

https://crm.ridemetro.org/forums/general-discussion/ddefba80-0dbc-ef11-b542-001dd80082b2

https://www.devex.com/people/ticket-cancellation-what-is-the-expedia-cancellation-policy-2194774

https://www.devex.com/people/does-united-have-a-free-cancellation-policy-2194707

https://www.devex.com/people/is-there-a-penalty-to-cancel-a-united-flight-2194693