8 Airline Fees and Pitfalls to Watch Out For

Tricking You Into Paying for Expensive Add-Ons

Savvy tech users, beware: United Airlines has figured out a sneaky way to get you to buy expensive add-ons during check-in.

We're all used to pressing the bottom-right button to get to the next screen. United Airlines has taken advantage of this by making the traditional "Next" button the "Purchase" button instead. If you're not careful, you'll purchase an expensive add-on—extra leg room or an upgrade to business class—before you even realize it. And business class doesn't come cheap.