https://central.xero.com/s/question/0D58V00009RlA5wSAF/what-are-the-cheapest-days-to-fly-on-ntier-lines-quicksupport
https://central.xero.com/s/question/0D58V00009RlA5wSAF/what-are-the-cheapest-days-to-fly-on-%F0%9D%95%97%F0%9D%95%A3%F0%9D%95%A0ntier-%F0%9D%94%B8%F0%9D%95%9A%F0%9D%95%A3lines-quicksupport