| Zaventem to Navodari | 1,206.00 mi (1,940.88 km) |
| Zaventem to Negresti-Oas | 875.20 mi (1,408.50 km) |
| Zaventem to Nehoiu | 1,072.45 mi (1,725.94 km) |
| Zaventem to Ocna Mures | 935.03 mi (1,504.78 km) |
| Zaventem to Odobesti | 1,091.65 mi (1,756.84 km) |
| Zaventem to Odorheiu Secuiesc | 999.03 mi (1,607.78 km) |
| Zaventem to Oltenita | 1,130.96 mi (1,820.10 km) |
| Zaventem to Onesti | 1,063.78 mi (1,711.98 km) |
| Zaventem to Oradea | 831.85 mi (1,338.74 km) |
| Zaventem to Orastie | 924.35 mi (1,487.60 km) |
| Zaventem to Oravita | 890.17 mi (1,432.60 km) |
| Zaventem to Orsova | 931.21 mi (1,498.63 km) |
| Zaventem to Otelu Rosu | 900.24 mi (1,448.80 km) |
| Zaventem to Otopeni | 1,090.27 mi (1,754.62 km) |
| Zaventem to Ovidiu | 1,205.54 mi (1,940.13 km) |
