It's a joke, it's hilarious... (and its a little old, June 08) but I seriously wish it was real.....
http://flyderrie-air.com/
"Pack Less. Weigh Less. Pay Less."
Welcome to Derrie-Air, the world's only carbon-neutral luxury airline, where you don't have to choose between living the high life and saving the planet. ......
The magic comes from our one of a kind "Sliding Scale"—the more you weigh, the more you'll pay. After all, it takes more fuel—more energy—to get more weight from point A to point B. So we will charge passengers based on how much mass they add to the plane.