The nearest airports are Zurich Airport (ZRH), the Bodensee-Airport Friedrichshafen (FDH), and Stuttgart (STR).
Trains to Konstanz leave every half hour.
For further information refer to: www.sbb.ch
In order to travel to Konstanz you need to take a train from the Airport to the Stuttgart main station (Hbf), leaving every 10-20 minutes. At the main station you switch to a train going to Konstanz via Singen (1 change in Singen).
For further information refer to: www.bahn.de
From the Bodensee-Airport Friedrichshafen you can travel to Konstanz either by train or by train and boat:
1. By train vial Radolfzell (1 change).
2. By train to Friedrichshafen, Hafenbahnhof and then by catamaran to Konstanz Hafen (1 change).
For further information refer to: www.qixxit.de
Take the motorway A81 from Stuttgart towards Singen. From the interchange "Hegau" follow the road signs to Konstanz.
For detailed instructions: Google Maps: Stuttgart to Konstanz
Take the motorway A96 from Munich towards Lindau. In Lindau switch to the B31 towards Meersburg.
Once you reach Meersburg take the ferry from Meersburg to Konstanz.
For detailed instructions: Google Maps: Munich to Konstanz
Take the motorway A7 towards Kreuzlingen/Konstanz.
For detailed instructions: Google Maps: Zurich to Konstanz