You think you're flying from Oslo? You're not. You're flying from Torp (Sandefjord) which is about half-way between Oslo and Kristiansand. And Charleroi is not the name of a Brussels airport - Charleroi is a different town, and it is further from Brussels than Gent and Antwerp (but in the other direction)

If I were you I'd try to find a flight from Oslo to Brussels...