The nearest airport is in Brussels Airport (BRU), located 7.1 mi (11.4 km) from the city center. If you're unable to find a flight that fits your schedule, you could book a flight to Antwerp (ANR-Antwerp Intl.), which is 25.5 mi (41 km) away.
It's easy to get around Ixelles by catching a ride on the metro at Dautzenberg Tram Stop, Flagey Tram Stop or Étangs d'Ixelles Tram Stop.