| New Cassel to Octeville | 3,419.03 mi (5,502.39 km) |
| New Cassel to Oignies | 3,592.99 mi (5,782.36 km) |
| New Cassel to Oissel | 3,541.25 mi (5,699.09 km) |
| New Cassel to Olivet | 3,612.78 mi (5,814.20 km) |
| New Cassel to Ollioules | 3,922.47 mi (6,312.60 km) |
| New Cassel to Olonne-sur-Mer | 3,486.10 mi (5,610.33 km) |
| New Cassel to Oloron-Sainte-Marie | 3,627.58 mi (5,838.03 km) |
| New Cassel to Onet Village | 3,739.42 mi (6,018.01 km) |
| New Cassel to Onnaing | 3,619.84 mi (5,825.58 km) |
| New Cassel to Orange | 3,845.21 mi (6,188.27 km) |
| New Cassel to Orchies | 3,603.15 mi (5,798.71 km) |
| New Cassel to Orleans | 3,612.14 mi (5,813.17 km) |
| New Cassel to Orly | 3,611.11 mi (5,811.53 km) |
| New Cassel to Ormesson-sur-Marne | 3,616.20 mi (5,819.71 km) |
| New Cassel to Orsay | 3,603.59 mi (5,799.41 km) |
