In Cardinal Station, click on the Schedule of Classes link

image of the course catalog available on Cardinal Station

Make sure that you select the Term that you are looking for, then click on the triangle in front of Additional Search Criteria. 

Search Criteria in Cardinal Station to select classes

Use the drop down next to Mode of Instruction to choose "Online."

Then only those courses coded to take place online will appear in the search results. 

Additional search criteria available to refine courses