If you take a correspondence course from a "Brick & Mortar" school, the diploma you get will be exactly the same as a student who physically attended the school. The only way someone could know that you finished your degree online would be to ask you directly.
However, if you end up getting your diploma from "The University of Cheap-Degrees-Online.com", you might raise a few eyebrows.
It's quite common for students to start out on campus and move further away as they advance their learning (and decide they want to study things that only exist off campus, etc), so there is nothing wrong with starting your degree on campus and finishing it over the internet. I would suggest seeing if your original university offers online courses.
But I already have like 3 years of college under my belt. But I don't have time to go to a physical college. I'm employed full time. I know that I would still have to work hard though. But is an online degree from an accredited college, including the brick and mortar stuff, good enough for a work visa? Thanks. 
