more than likely just one stamp will do it
Postage rates within the US are based upon the weight of the item sent and the speed it is to go, not on how far it is going. The price is, therefore, the same for a package or a letter going across the country as it would be to send it across town.
1 ounce...which is usually defined as 2-3 pieces of paper in an envelope, will be one stamp.
It depends on the package...If it is a normal letter...it will be just the one postage stamp
If it is one ounce, it will cost one stamp.