https://www.entmasterclass.com/forum/general-discussion/tm-1-866-738-0640-what-day-of-the-week-are-delta-flights-cheapest-cheapest-dayhttps://www.entmasterclass.com/forum/general-discussion/tm-1-866-738-0640-what-day-of-the-week-are-delta-flights-cheapest-cheapest-day