To calculate every month normal charges, KAYAK requires all price ranges for each and every month during the last 12 months for round-journey flights from London to Atlanta, gets rid of the top 0.1% to account for outliers, and then can take the median of all values for each month. https://cheapestbusinessclassflight.blogspot.com/2024/10/what-are-benefits-of-volunteering-while.html