To work out month-to-month common costs, KAYAK normally takes all charges for every month over the last 12 months for round-journey flights from London to Atlanta, gets rid of the highest 0.1% to account for outliers, and then usually takes the median of all values for each and every month. https://flighttobangkokfromlondon.blogspot.com/2024/12/how-can-you-plan-short-day-trips-in.html