As Scptt said, if you take them in you wait about an hour. If they
have nothing going on, maybe 15 minutes. It uses the same machine (for
film, it scans the negative and prints it).
However, you usually two other options. First off, you can go to their
website and upload the pictures. Then drive to the store to pick them
up. That way, you trip in is part of the wait.
Also, they usually have a machine off to the side that lets you insert
a card or CD and make the prints yourself. It usually has a scanner on
top, too, for duping pictures. It them prints them out of the bottom
of the same machine. It's a little more expensive but the print
quality is usually better. It is also about a 2 minute wait.
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