From the airport in Düsseldorf take S11 in direction Bergisch-Gladbach until Düsseldorf main station (travel time approx. 12 minutes). From there you reach the Areal Böhler with the metro-lines U 74 and U 76 (in direction Meerbusch / Krefeld. Get off at the stop Düsseldorf-Lörick, travel time approx. 17 minutes).
By taxi the travel time from Düsseldorf airport to Areal Böhler takes approx. 20 minutes.