https://support.accountingseed.com/hc/en-us/community/posts/33968984623635–FAQ-FRONTIER-What-days-are-Frontier-cheapest-to-fly
https://support.accountingseed.com/hc/en-us/community/posts/33968984623635–FAQ-FRONTIER-What-days-are-Frontier-cheapest-to-fly https://support.accountingseed.com/hc/en-us/community/posts/33968984623635–FAQ-FRONTIER-What-days-are-Frontier-cheapest-to-fly