| Prior Lake to Octeville | 4,045.84 mi (6,511.15 km) |
| Prior Lake to Oignies | 4,181.78 mi (6,729.93 km) |
| Prior Lake to Oissel | 4,158.18 mi (6,691.94 km) |
| Prior Lake to Olivet | 4,247.93 mi (6,836.39 km) |
| Prior Lake to Ollioules | 4,600.14 mi (7,403.21 km) |
| Prior Lake to Olonne-sur-Mer | 4,161.51 mi (6,697.30 km) |
| Prior Lake to Oloron-Sainte-Marie | 4,343.75 mi (6,990.60 km) |
| Prior Lake to Onet Village | 4,420.77 mi (7,114.53 km) |
| Prior Lake to Onnaing | 4,206.61 mi (6,769.89 km) |
| Prior Lake to Orange | 4,516.13 mi (7,268.01 km) |
| Prior Lake to Orchies | 4,190.49 mi (6,743.94 km) |
| Prior Lake to Orleans | 4,246.66 mi (6,834.34 km) |
| Prior Lake to Orly | 4,230.15 mi (6,807.77 km) |
| Prior Lake to Ormesson-sur-Marne | 4,233.78 mi (6,813.61 km) |
| Prior Lake to Orsay | 4,224.47 mi (6,798.62 km) |
