| Sint-Pieters-Leeuw to Novi di Modena | 510.20 mi (821.09 km) |
| Sint-Pieters-Leeuw to Novi Ligure | 466.26 mi (750.38 km) |
| Sint-Pieters-Leeuw to Nuoro | 763.39 mi (1,228.55 km) |
| Sint-Pieters-Leeuw to Occhiobello | 528.21 mi (850.08 km) |
| Sint-Pieters-Leeuw to Oderzo | 512.38 mi (824.59 km) |
| Sint-Pieters-Leeuw to Oggiono | 417.31 mi (671.59 km) |
| Sint-Pieters-Leeuw to Olbia | 726.56 mi (1,169.29 km) |
| Sint-Pieters-Leeuw to Oleggio | 410.95 mi (661.35 km) |
| Sint-Pieters-Leeuw to Olgiate Comasco | 407.70 mi (656.13 km) |
| Sint-Pieters-Leeuw to Olgiate Olona | 414.69 mi (667.38 km) |
| Sint-Pieters-Leeuw to Omegna | 388.86 mi (625.81 km) |
| Sint-Pieters-Leeuw to Opera | 437.68 mi (704.37 km) |
| Sint-Pieters-Leeuw to Oppeano | 495.66 mi (797.69 km) |
| Sint-Pieters-Leeuw to Orbassano | 427.03 mi (687.24 km) |
| Sint-Pieters-Leeuw to Orbetello | 663.82 mi (1,068.31 km) |
