https://www.devex.com/people/does-lufthansa-allow-flight-changes-2460795

https://www.devex.com/people/quick-refund-is-expedia-actually-fully-refundable-2460342

https://www.devex.com/people/can-you-cancel-with-expedia-and-get-a-refund-2454613

https://www.devex.com/people/can-you-get-a-full-refund-on-expedia-within-24-hours-2453157

https://www.devex.com/people/what-is-the-refundable-option-on-expedia-2446157

https://www.devex.com/people/qatar-airways-devuelve-dinero-2430217

https://www.devex.com/people/como-puedo-conectarme-con-alguien-en-qatar-airways-2426835

SADAS

https://thelinuxforum.com/forum/general-linux-forums/general-linux-discussions/16618-contact-1-855~838~4982-does-singapore-airlines-have-free-24-hour-cancellation

https://knowt.com/note/ddde5ac2-9161-4fc3-944a-75f358264ac1/Cmo-hablo-con-alguien-en-JetBlue