| Mastic to Octeville | 3,386.60 mi (5,450.21 km) |
| Mastic to Oignies | 3,561.37 mi (5,731.47 km) |
| Mastic to Oissel | 3,508.97 mi (5,647.14 km) |
| Mastic to Olivet | 3,579.99 mi (5,761.44 km) |
| Mastic to Ollioules | 3,888.50 mi (6,257.94 km) |
| Mastic to Olonne-sur-Mer | 3,452.46 mi (5,556.19 km) |
| Mastic to Oloron-Sainte-Marie | 3,592.96 mi (5,782.31 km) |
| Mastic to Onet Village | 3,705.48 mi (5,963.39 km) |
| Mastic to Onnaing | 3,588.25 mi (5,774.73 km) |
| Mastic to Orange | 3,811.44 mi (6,133.92 km) |
| Mastic to Orchies | 3,571.56 mi (5,747.87 km) |
| Mastic to Orleans | 3,579.37 mi (5,760.44 km) |
| Mastic to Orly | 3,578.72 mi (5,759.40 km) |
| Mastic to Ormesson-sur-Marne | 3,583.84 mi (5,767.63 km) |
| Mastic to Orsay | 3,571.15 mi (5,747.22 km) |
