Based upon an Assessment of KAYAK data for all flights departing from inside of Uk over the last 12 months, the cheapest working day to fly for domestic flights is Tuesday. For Worldwide flights, Tuesday had the cheapest tickets on average. You could find the entire listing of the cookies https://a-z-directory.com/listings13093416/how-much-you-need-to-expect-you-ll-pay-for-a-good-cheap-flights