https://forum.dimensionengineering.com/topic/6691-aa-full-guidewhat-is-the-cheapest-day-to-fly-on–/
https://forum.dimensionengineering.com/topic/6691-%E3%80%90%C2%AEaa%C2%AE-full%C2%AE-guide%E2%84%A2%E3%80%91what-is-the-cheapest-day-to-fly-on-%F0%9D%90%80%F0%9D%90%A6%F0%9D%90%9E%F0%9D%90%AB%F0%9D%90%A2%F0%9D%90%9C%F0%9D%90%9A%F0%9D%90%A7-%F0%9D%90%80%F0%9D%90%A2%F0%9D%90%AB%F0%9D%90%A5%F0%9D%90%A2%F0%9D%90%A7%F0%9D%90%9E%F0%9D%90%AC/