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https://www.devex.com/people/does-frontier-airlines-give-refunds-frontier-refund-policy-2013775
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https://www.devex.com/people/usa-faq-what-days-are-frontier-flights-cheapest-know-2013710
https://hackmd.io/@James1998/rkqHBUVJ1l
https://www.devex.com/people/usa-faq-can-you-get-a-refund-from-turkish-airlines-2013420
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