Ever wanted to know the best time to buy your airline tickets?

Farecast tries to predict air fare costs

If you've ever wished someone would tell you just when to book your air tickets for the best possible deal, then hope is at hand. Farecast.com is a Beta aimed at just this task...an electronic and intelligent fortune teller of sorts, that'll tell you if its the right time to buy or not.
How does it work?

Fare Prediction and Fare History – the site predicts where fares are going and show where they've been for about 75 home airports at the moment.

Fare Prediction
A Fare Prediction shows if the lowest fare is rising or dropping over the next seven days for the specific dates and cities searched. Each prediction includes the following elements:
Arrow: An indication of whether the lowest fare is rising, dropping, or staying the same.
Confidence: A percentage based on our track record for similar predictions for the market searched.
Average Fare Change: An amount reflecting the average fare change recorded when similar predictions were correct for the market.
Buying Tip: Our recommendation based on the prediction information.