https://support.us.edu/hc/en-us/community/posts/27085112347031-Does-Frontier-offer-fully-refundable-tickets-Fully-Refundable
https://support.us.edu/hc/en-us/community/posts/27084282240791-How-can-I-change-my-flight-date-with-Frontier-FAQ
https://support.us.edu/hc/en-us/community/posts/27083523710231--Full-Process-1-855-838-4882-Frontier-Airlines-check-in-Frontier-Check-in
https://support.us.edu/hc/en-us/community/posts/27082774154519-1-855-838-4882-Frontier-Airlines-Check-In-FAQ
https://www.transfermarkt.com/-frontier-airline-trade-1-866-738-0738-can-i-get-a-refund-for-a-cancelled-flight-on-f%F0%9D%93%87o%F0%9D%93%83...
https://communicators.ncsu.edu/articles/can-i-get-a-full-refund-from-frontier-airlines-faq
https://communicators.ncsu.edu/articles/cancelm-1-866-738-0738-can-i-get-a-refund-for-a-cancelled-flight-
https://communities.actian.com/s/question/0D5Nu00000Ks4BWKAZ/do-you-get-a-refund-if-you-cancel-your-flight-with-frontierfaq
https://www.transfermarkt.com/-american-airlines-%F0%9D%9F%8F-%F0%9D%9F%96%F0%9D%9F%93%F0%9D%9F%93-%F0%9D%9F%93%F0%9D%9F%93%F0%9D%9F%8E-%F0%...
https://www.transfermarkt.com/-expedia-support-what-is-the-cheapest-day-to-buy-tickets-on-expedia-faqs/thread/forum/696/thread_id/37052/page...
https://www.transfermarkt.com/-cheapest-day-to-book-aa-trade-what-day-is-the-cheapest-to-book-american-airlines-lowfaretips/zwischenseite/fo...
https://www.transfermarkt.com/-aa-best-day-to-book-trade-what-day-is-the-cheapest-to-book-american-airlines-savebig/thread/forum/696/thread_...