| Sint-Martens-Lennik to Oria | 961.68 mi (1,547.67 km) |
| Sint-Martens-Lennik to Oristano | 782.63 mi (1,259.52 km) |
| Sint-Martens-Lennik to Orta Nova | 855.42 mi (1,376.66 km) |
| Sint-Martens-Lennik to Orte | 695.28 mi (1,118.95 km) |
| Sint-Martens-Lennik to Ortona | 758.72 mi (1,221.05 km) |
| Sint-Martens-Lennik to Orvieto | 672.77 mi (1,082.71 km) |
| Sint-Martens-Lennik to Orzinuovi | 458.41 mi (737.73 km) |
| Sint-Martens-Lennik to Osimo | 668.25 mi (1,075.45 km) |
| Sint-Martens-Lennik to Ospitaletto | 453.33 mi (729.56 km) |
| Sint-Martens-Lennik to Ostuni | 947.36 mi (1,524.64 km) |
| Sint-Martens-Lennik to Ottaviano | 846.72 mi (1,362.66 km) |
| Sint-Martens-Lennik to Ovada | 474.00 mi (762.82 km) |
| Sint-Martens-Lennik to Ozieri | 743.23 mi (1,196.11 km) |
| Sint-Martens-Lennik to Paceco | 976.35 mi (1,571.28 km) |
| Sint-Martens-Lennik to Pachino | 1,113.26 mi (1,791.62 km) |
