To compute daily typical rates, KAYAK usually takes all prices for every single day just before departure during the last calendar year for flights from London Heathrow Airport to Austin, removes the top 0.1% to account for outliers, after which requires the common of all the values for every month. https://amritsarfirstclassflight.blogspot.com/2024/07/how-to-design-your-las-vegas-holiday.html