| Sint-Martens-Lennik to Oignies | 55.59 mi (89.47 km) |
| Sint-Martens-Lennik to Oissel | 168.94 mi (271.88 km) |
| Sint-Martens-Lennik to Olivet | 226.72 mi (364.86 km) |
| Sint-Martens-Lennik to Ollioules | 535.27 mi (861.43 km) |
| Sint-Martens-Lennik to Olonne-sur-Mer | 399.54 mi (643.00 km) |
| Sint-Martens-Lennik to Oloron-Sainte-Marie | 571.02 mi (918.97 km) |
| Sint-Martens-Lennik to Onet Village | 450.42 mi (724.89 km) |
| Sint-Martens-Lennik to Onnaing | 37.38 mi (60.15 km) |
| Sint-Martens-Lennik to Orange | 461.30 mi (742.40 km) |
| Sint-Martens-Lennik to Orchies | 45.61 mi (73.41 km) |
| Sint-Martens-Lennik to Orleans | 224.15 mi (360.73 km) |
| Sint-Martens-Lennik to Orly | 162.25 mi (261.12 km) |
| Sint-Martens-Lennik to Ormesson-sur-Marne | 156.63 mi (252.07 km) |
| Sint-Martens-Lennik to Orsay | 169.59 mi (272.94 km) |
| Sint-Martens-Lennik to Orthez | 555.30 mi (893.68 km) |
