| Rock Island to Octeville | 4,083.63 mi (6,571.97 km) |
| Rock Island to Oignies | 4,231.85 mi (6,810.50 km) |
| Rock Island to Oissel | 4,199.74 mi (6,758.83 km) |
| Rock Island to Olivet | 4,284.58 mi (6,895.36 km) |
| Rock Island to Ollioules | 4,625.57 mi (7,444.14 km) |
| Rock Island to Olonne-sur-Mer | 4,185.00 mi (6,735.11 km) |
| Rock Island to Oloron-Sainte-Marie | 4,355.03 mi (7,008.75 km) |
| Rock Island to Onet Village | 4,443.97 mi (7,151.87 km) |
| Rock Island to Onnaing | 4,257.45 mi (6,851.70 km) |
| Rock Island to Orange | 4,543.25 mi (7,311.66 km) |
| Rock Island to Orchies | 4,241.04 mi (6,825.30 km) |
| Rock Island to Orleans | 4,283.49 mi (6,893.61 km) |
| Rock Island to Orly | 4,271.57 mi (6,874.43 km) |
| Rock Island to Ormesson-sur-Marne | 4,275.66 mi (6,881.02 km) |
| Rock Island to Orsay | 4,265.30 mi (6,864.33 km) |
