https://www.transfermarkt.com/-american-airlines-trade-what-days-are-american-airlines-cheapest-to-fly-/thread/forum/696/thread_id/31175/page/1#anchor_31652
https://www.transfermarkt.com/-american-airlines-trade-what-days-are-american-airlines-cheapest-to-fly-/thread/forum/696/thread_id/31175/page/1#anchor_31652