Brussels Airport is located not fare from the center: just 12 kilometers. It uses only two terminals:
A: Schengen flights from Concourse A
B: non-Schengen flights from Concourse B
At Brussels Airport there is a train station below the terminal connecting you directly to the Central Station in 30 minutes. This is the most nearby stop from the Brussels Square Convention and Meetings Center. It also holds several metro lines to connect you to the rest of the city.
Brussels South Charleroi Airport
A second, smaller airport is located in the town of Charleroi, 46 km from Brussels. At the Charleroi Airport mainly low-cost airlines operate and flights are mostly bound to European destinations.
There is a shuttle bus service to Brussels (Brussels-midi station).