what's the best option to get to the hotel from the airport?
It depends when you're arriving (week day, week-end or after 8pm).
Usually the best option is to take the airport train that departs from level -1 below the departure/arrival terminals. It takes about 25 min to the Brussels-Luxembourg railway station that's only 100meters away from the Radisson RED.
Otherwise there is an express bus line n°12 (operating on week days before 8pm and taking about 30min to Brussels-Luxembourg). The bus platform is located in the Airport as well Level 0 platform C.
Hope it helps!
Enjoy your trip,
Definitely the train! It takes u there in 25 min and it costs 8 eur.
Out of working hours or at night maybe better a cab.
Train was easy and stop is right by Radisson
Get an answer from Radisson RED Brussels staff and past guests.