Car: Uttwil (Switzerland) is located on the main road between Kreuzlingen and Romanshorn.
Train: Uttwil is one of the stops of "Seelinie" Kreuzlingen-Romanshorn-Rorschach: www.sbb.ch
Ship: (Mainau/Meersburg) Kreuzlingen - Rorschach (Lindau) and return: www.bodensee-schiffe.ch
Next airports are: Zürich (Switzerland), Friedrichshafen (Germany) and Altenrhein (Switzerland)
Further information about Uttwil