| Piedmont to Nuth | 5,547.66 mi (8,928.10 km) |
| Piedmont to Oegstgeest | 5,441.45 mi (8,757.16 km) |
| Piedmont to Oirschot | 5,500.48 mi (8,852.17 km) |
| Piedmont to Oisterwijk | 5,493.31 mi (8,840.63 km) |
| Piedmont to Oldebroek | 5,465.98 mi (8,796.64 km) |
| Piedmont to Oldenzaal | 5,500.50 mi (8,852.20 km) |
| Piedmont to Ommen | 5,476.11 mi (8,812.94 km) |
| Piedmont to Oosterend | 5,440.75 mi (8,756.05 km) |
| Piedmont to Oosterhout | 5,480.72 mi (8,820.37 km) |
| Piedmont to Oosterwolde | 5,447.37 mi (8,766.69 km) |
| Piedmont to Oostzaan | 5,439.57 mi (8,754.14 km) |
| Piedmont to Opmeer | 5,427.24 mi (8,734.30 km) |
| Piedmont to Oss | 5,492.18 mi (8,838.80 km) |
| Piedmont to Oud-Beijerland | 5,458.96 mi (8,785.34 km) |
| Piedmont to Oudenbosch | 5,474.39 mi (8,810.18 km) |
