https://www.crmportalconnector.com/developer-network/forums/general-discussions/what-is-the-cheapest-day-to-book-flights-on-delta-cheapest-fly
https://www.crmportalconnector.com/developer-network/forums/general-discussions/what-is-the-cheapest-day-to-book-flights-on-delta-cheapest-fly
https://www.crmportalconnector.com/developer-network/forums/general-discussions/what-is-the-cheapest-day-to-book-flights-on-delta-cheapest-fly