To compute every month common rates, KAYAK requires all costs for every month over the past year for flights from London Heathrow Airport to Austin, gets rid of the very best 0.one% to account for outliers, and after that requires the median of all values for each and every month. https://advicebookmarks.com/story26109965/not-known-factual-statements-about-flights-to-austin-from-london