pricing system is being used on international flights. >> since we have service to international, we have the awareness of the pay by weight system and the indications are that once people have acknowledged that their air flight runs by weight and not by seat it makes it easier for them to understand. >> reporter: understand, maybe, appreciate not really. at the time you buy your ticket you give your weight. for the typical male american 195 pounds, traveling what 35-pound back. $97 for a round trip flight between the island of samoa and the american city of pago, pago. 60 or 70 dallas more than the competition charges. if you are you're skin year and you bring less luggage you pay less. if you show up at the gate and you look heavier than you claim you were when you bought your ticket you may be asked to step