| Sint-Joost-ten-Node to Oignies | 66.31 mi (106.72 km) |
| Sint-Joost-ten-Node to Oissel | 179.27 mi (288.50 km) |
| Sint-Joost-ten-Node to Olivet | 234.60 mi (377.55 km) |
| Sint-Joost-ten-Node to Ollioules | 537.17 mi (864.49 km) |
| Sint-Joost-ten-Node to Olonne-sur-Mer | 409.20 mi (658.55 km) |
| Sint-Joost-ten-Node to Oloron-Sainte-Marie | 578.50 mi (931.00 km) |
| Sint-Joost-ten-Node to Onet Village | 455.68 mi (733.35 km) |
| Sint-Joost-ten-Node to Onnaing | 46.95 mi (75.56 km) |
| Sint-Joost-ten-Node to Orange | 464.16 mi (746.99 km) |
| Sint-Joost-ten-Node to Orchies | 56.23 mi (90.49 km) |
| Sint-Joost-ten-Node to Orleans | 232.05 mi (373.45 km) |
| Sint-Joost-ten-Node to Orly | 170.44 mi (274.30 km) |
| Sint-Joost-ten-Node to Ormesson-sur-Marne | 164.63 mi (264.94 km) |
| Sint-Joost-ten-Node to Orsay | 178.04 mi (286.53 km) |
| Sint-Joost-ten-Node to Orthez | 562.99 mi (906.05 km) |
