To work out day by day ordinary price ranges, KAYAK can take all rates for on a daily basis just before departure over the last 12 months for flights from London Heathrow Airport to Austin, gets rid of the top 0.1% to account for outliers, after which you can will https://www.evernote.com/shard/s668/sh/d1a73892-71c2-9129-074f-589e65cdabcb/GPo8jiDtbWb8PfjoXyNavqJxyPsP0bPCthoUYc7iaeM-5aNTVZCPfZB8jg