To determine day-to-day ordinary rates, KAYAK will take all price ranges for every day ahead of departure over the last year for flights from London Heathrow Airport to Austin, eliminates the top 0.1% to account for outliers, then normally takes the typical of all of the values for every month. https://1stclassflighttodhaka.blogspot.com/2024/07/importance-of-opting-holiday-packages.html