Leaving or returning from a trip via Brussels Airport or Charleroi Airport? Travel to or from the airport by train! From most Belgian stations you can easily travel to and from Brussels Airport and Charleroi Airport, with a direct connection or a change of trains. 

Brussels Airport Zaventem
Get in and you're off.
The train to Brussels Airport-Zaventem station takes you right to your terminal. The Brussels Airport Supplement is included in most tickets to/from the airport.
Charleroi Airport
Opt for a stress-free journey to Charleroi Airport
Take the train to Charleroi-Central station, and from there the bus to Charleroi Airport taking only 20 minutes. You can buy a combined train + bus ticket.
You can also buy your bus ticket from Charleroi-Central station to the airport separately.