i want to buy iphone 6s or 6s with facetime but facetime is not available in Saudi Arabia, can i order thru apple u.s.a website and delivered in here in Saudi Arabia?

Unfortunately no. See the quote below from http://www.apple.com/shop/help/shipping_delivery

The Apple Online Store US ships items within the continental US, Alaska, Hawaii and Puerto Rico. No shipments can be made to PO Box addresses, United States territories, or addresses outside of the United States. You may not export any products purchased at the Apple Online Store.