Delft is accessible by train from Paris, Brussels, Berlin and London via Rotterdam (check NS International website).
The nearest airport is Rotterdam The Hague Airport. This airport has 40 destinations in Europe, and by its size has a shorter check-in time. From here a bus and train is needed to reach Delft (30-40 minutes). Alternatively, Schiphol Amsterdam Airport serves all destinations and is approximately one hour by train to Delft.
The TU Delft campus is accessible from Delft Station by bus lines 69, 55, 174, and 40.
For car accessibility, necessary information can be found on the TU Delft website.