When we flew back from Barcelona we looked into shipping something back through UPS and it was just about the same as paying for the extra luggage with Delta so we decided to take it on the plane with us.
International rates are much higher than shipping within the US. Also remember try to have merchants in Hawaii ship your purchases home for you. We ALWAYS have our Disney stuff mailed home, even when we drive. I don't have to worry about damaging it, leaving it in car at hotels overnight etc and it always arrives in perfect condition. Then I have roon for any extra stuff I may find on the way home
