Fly into Brussels Airport (BRU), the closest airport, located 6.3 mi (10.2 km) from the city center. If you can't find a flight that's convenient for your trip, you might consider flying into Charleroi (CRL-Brussels South Charleroi), which is 24.3 mi (39.1 km) away.
If you're traveling by train, you can make your way to Delta Station. You can see more of Oudergem by jumping on the metro at Herrmann-Debroux Station, Auderghem-Shopping Tram Stop or Rond-point du Souverain Tram Stop.