Alaska does not touch other US states. It has borders with Canada, the Arctic Ocean, the Pacific Ocean, the Bering Sea, and the Bering Strait.The United States bought Alaska from Russia on March 30, 1867. This was called the Alaska Purchase. This prevented Russia from having land on continental North America. Alaska cost $7.2 million. Today, that would be $120 million. The price was about $0.02 per acre ($4.74/km2).