What is the average cost of obtaining online doctorate degrees from a U.S. distance learning institution?

The average cost of obtaining an online doctorate degree course from a U.S. university varies from one educational institution to another. The tuition fee for doctorate degree programs are generally charged on per credit basis. The average per credit tuition fee for an online doctorate degree program ranges from six hundred to eight hundred dollars, depending on the type of course. Doctorate students can expect to pay tuition fee in excess of fifty thousand dollars over a five year period.