| Rostusa to Opwijk | 1,012.06 mi (1,628.76 km) |
| Rostusa to Ostend | 1,067.95 mi (1,718.70 km) |
| Rostusa to Oud-Heverlee | 989.42 mi (1,592.31 km) |
| Rostusa to Oud-Turnhout | 997.34 mi (1,605.06 km) |
| Rostusa to Oudenaarde | 1,029.15 mi (1,656.26 km) |
| Rostusa to Oudenburg | 1,063.44 mi (1,711.44 km) |
| Rostusa to Oupeye | 949.45 mi (1,527.99 km) |
| Rostusa to Overijse | 992.35 mi (1,597.03 km) |
| Rostusa to Overpelt | 978.17 mi (1,574.21 km) |
| Rostusa to Paal | 979.44 mi (1,576.26 km) |
| Rostusa to Peer | 973.42 mi (1,566.57 km) |
| Rostusa to Pepinster | 937.57 mi (1,508.87 km) |
| Rostusa to Peruwelz | 1,017.85 mi (1,638.08 km) |
| Rostusa to Perwez | 976.00 mi (1,570.71 km) |
| Rostusa to Philippeville | 970.06 mi (1,561.16 km) |
