Chris Langton told ABC Radio Australia that it was "the most fair way to travel."
Passengers now pay the price of seats but not pay the fees charged for each kilogram and is different for each route.
Samoa Air perform domestic flights. The airline feels that such a move could trigger another airline to implement the same policies.
"The important thing for airline seats but not heavy, and the smaller the aircraft an airline then more likely they will adopt this policy," said Langton.
"Anyone who travels must have felt they were paying for the passenger next to them."
The concept of the future
Under this new model, Langton said some families with children are now paying the ticket is cheaper. Security systems Kata Kata Bijak Margahayuland mansion Home security Kata Bijak Margahayuland systems Security cameras Kata Kata Mutiara Margahayuland Home security systems Kata Mutiara Margahayuland
"There is no extra charge for excess baggage or anything else, is principally a kilo a kilo," he said.
Samoa Water rates range from $ 1 to $ 4.16 per kilogram. Passengers pay the price of the combined weights between weight and their luggage.
Langton also said that the move was to help promote health awareness in Samoa, which is one of the countries with the highest obesity rates in the world.
Langton said the rates are based on the weight of "the concept of the future."
"People are now bigger, wider and higher than 50 years ago," he said. "The industry will begin to pay attention to this."