| Winnetka to Octeville | 3,943.61 mi (6,346.63 km) |
| Winnetka to Oignies | 4,094.72 mi (6,589.81 km) |
| Winnetka to Oissel | 4,060.51 mi (6,534.76 km) |
| Winnetka to Olivet | 4,144.12 mi (6,669.32 km) |
| Winnetka to Ollioules | 4,482.45 mi (7,213.81 km) |
| Winnetka to Olonne-sur-Mer | 4,041.79 mi (6,504.64 km) |
| Winnetka to Oloron-Sainte-Marie | 4,209.41 mi (6,774.39 km) |
| Winnetka to Onet Village | 4,300.52 mi (6,921.01 km) |
| Winnetka to Onnaing | 4,120.49 mi (6,631.29 km) |
| Winnetka to Orange | 4,400.53 mi (7,081.97 km) |
| Winnetka to Orchies | 4,104.03 mi (6,604.80 km) |
| Winnetka to Orleans | 4,143.08 mi (6,667.65 km) |
| Winnetka to Orly | 4,132.25 mi (6,650.22 km) |
| Winnetka to Ormesson-sur-Marne | 4,136.45 mi (6,656.98 km) |
| Winnetka to Orsay | 4,125.84 mi (6,639.89 km) |
