https://https://superuser.com/questions/1881872/is-expedia-really-free-cancellation.com/questions/1881872/is-expedia-really-free-cancellation
https://patch.com/california/unioncity/calendar/event/20250222/369b7d61-b10e-452a-8bcd-56fe3cfe6c4e/tuesday-mania-offer-what-is-the-cheapest-day-to-buy-frontier-tickets
https://www.pslhub.org/forums/topic/1834-%E3%80%90non-refundable%E3%80%91can-i-get-my-money-back-if-i-cancel-a-ba-flight/
