There's a shuttle bus from Charleroi airport to Brussels, but if you book it a couple of days before it costs 15 euros plus 3 euros booking. A train could be a lot cheaper but it's unclear how to get ...
I read that it's possible to travel by bus 12: "From Monday to Friday 8 pm the Airport Line is operated as an express service with number 12 and only serves the major stops. " It's not very clear ...
For an upcoming flight, it's looking quite a bit cheaper to take the Eurostar to Brussels, and fly from there, rather than fly direct from the UK as I would normally do. The Eurostar bit I know well, ...