A big point people in the thread below this comment seem to be missing is that airlines aren't aiming to break even. A tall person on a flight isn't going to ma

A big point people in the thread below this comment seem to be missing is that airlines aren't aiming to break even. A tall person on a flight isn't going to make that flight unprofitable. Prices are set based on what people are willing to pay, not the cost of flying them. It makes much more sense to raise prices across the board by a couple $ than waste time and money weighing every passenger you fly, dealing with people who lie about their weight when booking and trying to charge them extra at the airport. Not to mention there is probably a large section of the populace with an illness that effects their weight that would have to be ruled out of this anyway due to discrimination legislation.