To compute month-to-month normal selling prices, KAYAK can take all selling prices for every month over the past yr for round-vacation flights from London to Atlanta, gets rid of the very best 0.1% to account for outliers, and then requires the median of all values for on a monthly basis. https://businessflightslondontoauckland.blogspot.com/2024/07/first-class-flights-ultimate-comfort.html