The airport is readily accessible. From the Brussels Ring road, follow the road signs to Zaventem.
Factor in traffic congestion on the Brussels Ring road. Allow ample time to travel to the airport. Particularly during peak hours! Plan your travel route in advance, or consult the real-time mobility information (tip: use Chrome or Safari as browser).
Some GPS systems guide you right up to the terminal. That zone is no longer accessible to private vehicles. Follow the signposting to your chosen car park or the drop-off area.