| Piedmont to Octeville | 5,393.73 mi (8,680.38 km) |
| Piedmont to Oignies | 5,489.93 mi (8,835.18 km) |
| Piedmont to Oissel | 5,491.97 mi (8,838.48 km) |
| Piedmont to Olivet | 5,592.73 mi (9,000.64 km) |
| Piedmont to Ollioules | 5,965.54 mi (9,600.61 km) |
| Piedmont to Olonne-sur-Mer | 5,543.57 mi (8,921.51 km) |
| Piedmont to Oloron-Sainte-Marie | 5,751.05 mi (9,255.43 km) |
| Piedmont to Onet Village | 5,796.76 mi (9,328.98 km) |
| Piedmont to Onnaing | 5,511.57 mi (8,870.02 km) |
| Piedmont to Orange | 5,879.26 mi (9,461.76 km) |
| Piedmont to Orchies | 5,496.86 mi (8,846.34 km) |
| Piedmont to Orleans | 5,590.99 mi (8,997.83 km) |
| Piedmont to Orly | 5,562.03 mi (8,951.22 km) |
| Piedmont to Ormesson-sur-Marne | 5,564.21 mi (8,954.74 km) |
| Piedmont to Orsay | 5,558.23 mi (8,945.11 km) |
