Spanish translation: territorio continental de los Estados Unidos
Login or register (free and only takes a few minutes) to participate in this question.
You will also have access to many other tools and opportunities designed for those who have language-related jobs (or are passionate about them). Participation is free and the site has a strict confidentiality policy.
Los estados contiguos, Los Estados Unidos continentales
Explanation: Yes you are on the right track.. my first answer expresses the idea of the "contiguous" states.. and in my second answer I am just modifying Los Estados Unidos with the adjective "continental".. your answer would be good if you don't mind conveying the idea of territory, which could be confused with Puerto Rico or Guam which really are territories.. I hope this helps