https://www.hysanedu.co/forum/general-discussion/faqs-guide-experts-can-i-get-refunded-if-i-cancel-my-flight
https://central.xero.com/s/question/0D58V00009OynJXSAZ/can-you-cancel-southwest-within-24-hours-and-get-full-refund
https://www.upcm-anatomy.com/forum/general-discussion/spirit-usas-tm-how-does-spirit-handle-cancellations-faq-s