When you come by plane, you will probably want to choose Hamburg airport as destination.
Once in Hamburg, either you rent a car or you proceed easily by train.
City trains bring you from the airport to the train stations.
Plan of the city trains in Hamburg

There exist direct trains from Hamburg main station, which is also more easily reached from the airport. However, the more frequent trains (NOB) leave from Hamburg Altona.

Preliminary train schedules Hamburg-Husum
These schedules might be subject to changes! Please check at: Bahn.de


It takes about 2h to get to Husum main station, which is situated in the center of Husum.