CHARGED UP

As seats get narrower, airlines get fatter off bag fees, meals and other extras. Airlines globally were projected to pull in a record $82 billion in ancillary revenue last year, up nearly fourfold from 2010. Passengers grumble, but such additional revenue is a boost to carrier profitability—and in turn gets invested in new planes, in-flight entertainment and airport waiting areas. The top extra-charge highfliers: