| Middle River to Octeville | 3,598.79 mi (5,791.69 km) |
| Middle River to Oignies | 3,772.12 mi (6,070.64 km) |
| Middle River to Oissel | 3,720.92 mi (5,988.24 km) |
| Middle River to Olivet | 3,792.73 mi (6,103.81 km) |
| Middle River to Ollioules | 4,102.61 mi (6,602.51 km) |
| Middle River to Olonne-sur-Mer | 3,666.26 mi (5,900.28 km) |
| Middle River to Oloron-Sainte-Marie | 3,807.44 mi (6,127.48 km) |
| Middle River to Onet Village | 3,919.56 mi (6,307.93 km) |
| Middle River to Onnaing | 3,798.95 mi (6,113.82 km) |
| Middle River to Orange | 4,025.38 mi (6,478.22 km) |
| Middle River to Orchies | 3,782.26 mi (6,086.96 km) |
| Middle River to Orleans | 3,792.08 mi (6,102.77 km) |
| Middle River to Orly | 3,790.85 mi (6,100.79 km) |
| Middle River to Ormesson-sur-Marne | 3,795.92 mi (6,108.94 km) |
| Middle River to Orsay | 3,783.35 mi (6,088.71 km) |
