https://www.devex.com/people/top-faq-what-is-the-cancellation-policy-for-american-airlines-aa-2013601

https://www.devex.com/people/aa-american-airlines-provides-a-24-hour-refund-policy-faq-2013428

https://supportsi.hexagon.com/help/s/question/0D5Tc00000HIK7FKAX/american-can-i-cancel-a-flight-and-get-a-refund-in-american-%CA%96-%EF%BE%9...

https://supportsi.hexagon.com/help/s/question/0D5Tc00000HHcu8KAD/americancan-i-cancel-my-american-flight-for-free-cancellation-policy?langua...

https://www.aomeitech.com/forum/discussion/23083/%CF%9C-%E1%BD%80%CD%B7%CD%B3%CE%AF%E1%BC%93-does-frontier-have-a-24-hour-cancellation-polic...

https://www.aomeitech.com/forum/discussion/23194/how-to-avoid-frontier-cancellation-fee-or-does-frontier-give-you-a-refund-get-frontier/p1?n...

https://www.aomeitech.com/forum/discussion/22318/does-frontier-have-a-24-hour-cancellation-policy-get-f-q/p1?new=1

https://www.devex.com/people/how-to-avoid-frontier-cancellation-fee-does-frontier-give-you-a-refund-2009586

https://www.devex.com/people/how-long-do-you-have-to-cancel-with-frontier-allpolicy-2008533

https://www.devex.com/people/faq-does-frontier-have-a-24-hour-cancellation-policy-_contactus-2002899