| Zaventem to Oestrich-Winkel | 167.00 mi (268.77 km) |
| Zaventem to Offenburg | 227.77 mi (366.57 km) |
| Zaventem to Oftersheim | 210.18 mi (338.26 km) |
| Zaventem to Ohrdruf | 273.25 mi (439.76 km) |
| Zaventem to Ohringen | 251.74 mi (405.14 km) |
| Zaventem to Olbernhau | 387.46 mi (623.55 km) |
| Zaventem to Olching | 358.52 mi (576.99 km) |
| Zaventem to Oldenburg | 223.08 mi (359.01 km) |
| Zaventem to Oldenburg in Holstein | 357.89 mi (575.97 km) |
| Zaventem to Olfen | 138.52 mi (222.92 km) |
| Zaventem to Olpe | 146.82 mi (236.28 km) |
| Zaventem to Olsberg | 177.14 mi (285.09 km) |
| Zaventem to Oranienburg | 395.95 mi (637.22 km) |
| Zaventem to Ortenberg | 204.39 mi (328.94 km) |
| Zaventem to Oschatz | 375.85 mi (604.87 km) |
