https://www.devex.com/people/does-qatar-airways-allow-date-change-premium_travel-2409458

https://www.giantbomb.com/forums/general-discussion-30/worry-not-what-is-cancellation-policy-for-american-1925594/

https://www.devex.com/people/does-lufthansa-allow-free-changes-faqs-about-2409134

https://www.devex.com/people/what-is-the-cancellation-policy-for-lufthansa-2408501

https://www.devex.com/people/zero-penalty-what-is-the-cancellation-policy-for-lufthansa-full-refund-2409528

https://www.devex.com/people/can-you-change-the-date-of-your-flight-qatar-2408775

https://www.devex.com/people/can-you-cancel-a-qatar-ticket-qatar-2408558

https://www.devex.com/people/aa-como-llamar-a-american-airlines-en-espanol-telefono-2409495

https://www.devex.com/people/u_a-faq-s-how-late-can-you-cancel-a-united-fully-refundable-ticket-2409459

https://www.devex.com/people/how-late-can-you-cancel-your-klm-flight-last-minute-klm-cancel-2409395