Follow the Wagramer Straße in direction Zentrum. Drive over the Reichsbrücke (Danube) and follow the Lassallestraße to the Praterstern (roundabout). Follow the signs 'zum Prater'.
If you arrive by car: this area is a short-term parking zone. Please buy a prepaid parking voucher at a local tobacconist (€ 1,00 per hour - as per 1st of May 2012). Additionally you can find a variety of charged parking areas.
Take the U1 (red line) from Kagran to Praterstern (direction Reumannplatz, 5 stops). The Prater is within 200m from the station.