Belgium has two airports frequently marketed to Brussels but with very different road positions: Brussels Airport at Zaventem and Brussels South Charleroi. Antwerp, Liège and Ostend-Bruges serve narrower regional markets, while nearby Dutch, French and Luxembourg airports can be relevant for border provinces.
BRU is normally the primary choice for Brussels, Leuven, Mechelen and corporate travel. CRL serves many low-cost flights south of the capital. ANR, LGG and OST can reduce road time for Antwerp, eastern Wallonia or the Belgian coast when their schedules match.