To compute daily ordinary selling prices, KAYAK can take all charges for every day in advance of departure during the last 12 months for flights from London Heathrow Airport to Austin, removes the highest 0.1% to account for outliers, after which you can takes the common of all the values https://firstclassflightstohouston.wordpress.com/2024/07/23/exciting-and-relaxing-holiday-packages/