It’s easy to glean a lot of information about a person online - using things like internet cookies and customer account details. This personal information gives airlines clues on how much a potential customer earns, how old they are, and whether they are likely to be taking a business trip. They could then give a higher personalised fare to passengers they think are richer, while those earning less may be given special offers to entice them to book. Get the full story at The Sun and Phocuswire