To calculate each day ordinary prices, KAYAK usually takes all charges for day after day ahead of departure over the last calendar year for flights from London Heathrow Airport to Austin, gets rid of the top 0.one% to account for outliers, and after that will take the typical of all https://www.evernote.com/shard/s668/sh/d1a73892-71c2-9129-074f-589e65cdabcb/GPo8jiDtbWb8PfjoXyNavqJxyPsP0bPCthoUYc7iaeM-5aNTVZCPfZB8jg