I am traveling to Dominican Republic next month. We are staying at a Resort near Puerto Plata airport but Ive noticed flights are much cheaper to fly into Santiago airport. I know its only about 25 miles from one to the other, but I am wondering how much I can be looking to spend for transportation. Also what options do I have other then the bus system. And is the bus system safe for 2 american females in their mid 20's to travel alone if the flight comes in the middle of the night?