Klagenfurt is reachable per plane, train and car via highways A10 or A2.
Overview

Klagenfurt is situated in the southern part of Austria, within the largest inner alpine bassin.
You can find an interactive map with many options (zoom, search, satelite image, ...) here:
GIS Klagenfurt.
(you may have to follow a "reload link" on top of the next page).