| Circleville to Nuth | 4,123.23 mi (6,635.71 km) |
| Circleville to Oegstgeest | 4,030.12 mi (6,485.86 km) |
| Circleville to Oirschot | 4,082.66 mi (6,570.40 km) |
| Circleville to Oisterwijk | 4,076.27 mi (6,560.12 km) |
| Circleville to Oldebroek | 4,076.72 mi (6,560.85 km) |
| Circleville to Oldenzaal | 4,119.85 mi (6,630.26 km) |
| Circleville to Ommen | 4,094.20 mi (6,588.98 km) |
| Circleville to Oosterend | 4,066.26 mi (6,544.02 km) |
| Circleville to Oosterhout | 4,061.22 mi (6,535.90 km) |
| Circleville to Oosterwolde | 4,075.08 mi (6,558.21 km) |
| Circleville to Oostzaan | 4,038.64 mi (6,499.57 km) |
| Circleville to Opmeer | 4,033.29 mi (6,490.95 km) |
| Circleville to Oss | 4,082.88 mi (6,570.76 km) |
| Circleville to Oud-Beijerland | 4,038.40 mi (6,499.18 km) |
| Circleville to Oudenbosch | 4,049.97 mi (6,517.79 km) |
