To calculate day by day normal costs, KAYAK can take all price ranges for each day before departure over the past 12 months for flights from London Heathrow Airport to Austin, eliminates the best 0.1% to account for outliers, after which you can takes the normal of the many values https://firstclassflightstohouston.politics.blog/2024/09/08/what-should-you-know-before-booking-tickets-for-flights-to-memphis-from-uk/