| Winnetka to Nuth | 4,187.10 mi (6,738.49 km) |
| Winnetka to Oegstgeest | 4,089.81 mi (6,581.91 km) |
| Winnetka to Oirschot | 4,144.52 mi (6,669.96 km) |
| Winnetka to Oisterwijk | 4,137.86 mi (6,659.25 km) |
| Winnetka to Oldebroek | 4,132.46 mi (6,650.55 km) |
| Winnetka to Oldenzaal | 4,174.45 mi (6,718.12 km) |
| Winnetka to Ommen | 4,148.67 mi (6,676.63 km) |
| Winnetka to Oosterend | 4,118.74 mi (6,628.47 km) |
| Winnetka to Oosterhout | 4,123.12 mi (6,635.51 km) |
| Winnetka to Oosterwolde | 4,127.24 mi (6,642.14 km) |
| Winnetka to Oostzaan | 4,096.25 mi (6,592.28 km) |
| Winnetka to Opmeer | 4,089.34 mi (6,581.16 km) |
| Winnetka to Oss | 4,142.93 mi (6,667.40 km) |
| Winnetka to Oud-Beijerland | 4,100.18 mi (6,598.60 km) |
| Winnetka to Oudenbosch | 4,112.74 mi (6,618.82 km) |
