| Clarkston to Octeville | 4,176.23 mi (6,721.00 km) |
| Clarkston to Oignies | 4,349.67 mi (7,000.11 km) |
| Clarkston to Oissel | 4,298.44 mi (6,917.67 km) |
| Clarkston to Olivet | 4,369.86 mi (7,032.60 km) |
| Clarkston to Ollioules | 4,677.11 mi (7,527.08 km) |
| Clarkston to Olonne-sur-Mer | 4,241.79 mi (6,826.50 km) |
| Clarkston to Oloron-Sainte-Marie | 4,379.21 mi (7,047.66 km) |
| Clarkston to Onet Village | 4,494.18 mi (7,232.68 km) |
| Clarkston to Onnaing | 4,376.48 mi (7,043.27 km) |
| Clarkston to Orange | 4,600.51 mi (7,403.80 km) |
| Clarkston to Orchies | 4,359.79 mi (7,016.40 km) |
| Clarkston to Orleans | 4,369.23 mi (7,031.59 km) |
| Clarkston to Orly | 4,368.32 mi (7,030.13 km) |
| Clarkston to Ormesson-sur-Marne | 4,373.40 mi (7,038.31 km) |
| Clarkston to Orsay | 4,360.79 mi (7,018.01 km) |
