If you have a particular institution in mind, search its website for “distance education” or “online education”. If you want to search all the institutions in your state or across the country, you can use the U.S. Department of Education’s College Navigator. It won’t tell you if the program is online, but it does have may cool tools to help you search and compare programs. You can even save your favorites so that you can visit their sites to see if the program is offered online. If you are particularly interested in online programs offered by regionally-accredited institutions located in the WICHE states, you can search through those online programs listed on WICHE’s Internet Course Exchange (ICE).
How can I find the online program I need?
Online Learning for Students and Parents