To determine daily typical prices, KAYAK will take all rates for on a daily basis in advance of departure over the past calendar year for flights from London Heathrow Airport to Austin, gets rid of the top 0.one% to account for outliers, then requires the average of many of the https://www.evernote.com/shard/s629/sh/74e7a4a3-d9e0-393f-a28d-e67f61b0f1bd/ofozanjVoBmmkEjGMcCpbtl4WxGVMLOA8-UYqV7-SiMkBg5fhNYvX8X_GQ