From the Brussels International Airport, it takes you 15 minutes by taxi to come to U2U, or 35 minutes by train. From Brussels South Airport (Charleroi) it takes you about 30 minutes by taxi or 1 hour by shuttle bus and train.
by High Speed Train (TGV, Eurostar, Thalys)
The high speed trains TGV, Eurostar, Thalys, ICE stop in the railway station "Bruxelles Midi"; The ICE also stops in Brussels Central and North Station. There you can take a local train that brings you in about 20 minutes to U2U.