Many airline companies from other countries and continents regard Belgium as the first stop in Europe due to its central location in Europe. This also means direct flights for you to the many destinations both in Europe and overseas.
Belgium has five airports offering passenger services:

The national airport of Zaventem is the largest of these five airports. Brussels is the capital of Europe and is therefore perfectly situated for easy access to all other European nations.

You can find more information about air traffic on the FPS Mobility website in French or Dutch.