By car it only takes 3 hours to get to Halberstadt from Hamburg, it is a short 2 hour drive from Berlin, and even Cologne is just 4 hours away.
As a regional railroad center, Halberstadt offers train services in four directions. It is a 2 hour ride to both Berlin and Hannover, Frankfurt/Main is just 4 hours away.
The nearest International Airport ist Leipzig/Halle with direct flights to Hamburg and Munich (1 hour each) and London (3 hours), just to name a few. There is a direct train link from the airport via Halle main station to Halberstadt.