| Circleville to Octeville | 3,859.38 mi (6,211.07 km) |
| Circleville to Oignies | 4,023.21 mi (6,474.74 km) |
| Circleville to Oissel | 3,979.54 mi (6,404.46 km) |
| Circleville to Olivet | 4,056.85 mi (6,528.87 km) |
| Circleville to Ollioules | 4,379.98 mi (7,048.90 km) |
| Circleville to Olonne-sur-Mer | 3,940.63 mi (6,341.83 km) |
| Circleville to Oloron-Sainte-Marie | 4,093.49 mi (6,587.83 km) |
| Circleville to Onet Village | 4,196.96 mi (6,754.35 km) |
| Circleville to Onnaing | 4,049.65 mi (6,517.28 km) |
| Circleville to Orange | 4,300.54 mi (6,921.05 km) |
| Circleville to Orchies | 4,033.01 mi (6,490.50 km) |
| Circleville to Orleans | 4,056.02 mi (6,527.54 km) |
| Circleville to Orly | 4,050.50 mi (6,518.65 km) |
| Circleville to Ormesson-sur-Marne | 4,055.19 mi (6,526.20 km) |
| Circleville to Orsay | 4,043.46 mi (6,507.33 km) |
