I know that my school, Loma Linda University offers a clinical doctorate program, and I believe that it was online... At least I remember the professor in charge of it telling me it was all online and designed to fit around current professionals daily rigor of career. It is designed to be taken at whatever pace you can manage. Here's the website info as well as the contact info for more information:
http://alliedhealth.llu.edu/academics/communication-sciences-and-disorders-cmsd/degree-options/speech-language-pathology