- https://www.devex.com/people/2341441
- https://www.devex.com/people/is-united-actually-fully-refundable-does-united-offer-a-24-hour-cancellation-2340885
- https://www.devex.com/people/avoiding-penalties-what-is-the-cancellation-policy-on-expedia-2340513r
- https://www.devex.com/people/como-pedir-asistencia-en-delta-2339237
