The train will operate twice a week, leaving Vienna on Sunday and Wednesday evenings, arriving in Brussels at 10.30. On Mondays and Thursdays, the return journey starts from Brussels at 18.30.
The new train is in fact an extension of the existing Vienna/Innsbruck - Düsseldorf Nightjet, which will be diverted to Brussels via Aachen. For the first year, the coaches from Innsbruck will run without passengers between Düsseldorf and Brussels due to staff issues.
ÖBB says that from December 2020 this train will become a daily Vienna/Innsbruck - Düsseldorf - Amsterdam service with a portion going to Brussels. However, ÖBB will need to lease extra coaches as the current sleeper stock is already fully utilised.
The announcement follows similar expansion of Nightjet between Switzerland and Austria in August and a study published in July stating that there is a strong case to reintroduce overnight trains to and from the Netherlands.