Based on an Evaluation of KAYAK info for all flights departing from inside U.s. during the last 12 months, the cheapest working day to fly for domestic flights is Wednesday. For Global flights, Wednesday had the cheapest tickets on common. Flexibility is key for getting the greatest last minute bargains. https://cheap-flights54219.ampedpages.com/cheapest-flights-things-to-know-before-you-buy-60804146