| Sint-Pieters-Leeuw to Navodari | 1,213.76 mi (1,953.36 km) |
| Sint-Pieters-Leeuw to Negresti-Oas | 883.88 mi (1,422.47 km) |
| Sint-Pieters-Leeuw to Nehoiu | 1,080.25 mi (1,738.50 km) |
| Sint-Pieters-Leeuw to Ocna Mures | 942.92 mi (1,517.48 km) |
| Sint-Pieters-Leeuw to Odobesti | 1,099.80 mi (1,769.95 km) |
| Sint-Pieters-Leeuw to Odorheiu Secuiesc | 1,007.14 mi (1,620.84 km) |
| Sint-Pieters-Leeuw to Oltenita | 1,138.21 mi (1,831.77 km) |
| Sint-Pieters-Leeuw to Onesti | 1,072.11 mi (1,725.40 km) |
| Sint-Pieters-Leeuw to Oradea | 839.77 mi (1,351.49 km) |
| Sint-Pieters-Leeuw to Orastie | 931.79 mi (1,499.56 km) |
| Sint-Pieters-Leeuw to Oravita | 896.72 mi (1,443.13 km) |
| Sint-Pieters-Leeuw to Orsova | 937.76 mi (1,509.18 km) |
| Sint-Pieters-Leeuw to Otelu Rosu | 907.27 mi (1,460.11 km) |
| Sint-Pieters-Leeuw to Otopeni | 1,097.63 mi (1,766.46 km) |
| Sint-Pieters-Leeuw to Ovidiu | 1,213.27 mi (1,952.56 km) |
