By plane:
The closest Airports to Aachen are:
Maastricht-Aachen Airport (NL): 41 km
Liege Airport (B): 60 km
Cologne/Bonn Airport (GER): 85 km
Dusseldorf Airport (GER): 90 km
Brussels Airport (B): 143 km
Airport Weeze (GER): 144 km
By train:
Aachen is linked to the international railway network. Every two hours, the high-speed train THALYS operates via Aachen between Paris and Cologne. In between, ICE trains run from Frankfurt to Brussels via Aachen to Aachen Hauptbahnhof (5).
http://www.bahn.de/p_en/view/index.shtml
https://www.thalys.com/de/en/
