How Do You Travel From State to State in the United States?

I'm from Australia and we are recording this in Brazil. I thought you came here on a boat actually. Just swam all the way across the world. My city is the most isolated city in the world. Perth is actually quite a big city. It's just that there are no other cities close by. The closest city is like three or four hours by plane. How do you travel around from state to state in the United States?