https://www.devex.com/people/spirit-cheap-what-is-the-cheapest-day-to-buy-spirit-airline-tickets-2244530
https://community.tado.com/en-gb/discussion/25583/will-spirit-refund-my-money-if-i-cancel-100-get-full-refund/p1?new=1
https://www.ingrammicroresellerapplication.com/forums/general-discussion/6185366e-63c0-ef11-95f5-000d3addee67
https://community.tado.com/en-gb/discussion/25582/does-frontier-refund-you-if-you-cancel-full-refund-100/p1?new=1
https://www.ingrammicroresellerapplication.com/forums/general-discussion/43ccf397-62c0-ef11-95f5-000d3addee67
https://community.tado.com/en-gb/discussion/25581/get-instant-refund-does-frontier-refund-you-if-you-cancel/p1?new=1
https://www.ingrammicroresellerapplication.com/forums/general-discussion/dd9b80a4-61c0-ef11-95f5-000d3addee67
https://www.ingrammicroresellerapplication.com/forums/general-discussion/96755beb-60c0-ef11-95f5-000d3addee67
https://www.ingrammicroresellerapplication.com/forums/general-discussion/81755f51-60c0-ef11-95f5-000d3addee67