| Walnut Creek to Nuth | 5,537.66 mi (8,912.01 km) |
| Walnut Creek to Oegstgeest | 5,431.47 mi (8,741.10 km) |
| Walnut Creek to Oirschot | 5,490.50 mi (8,836.10 km) |
| Walnut Creek to Oisterwijk | 5,483.32 mi (8,824.56 km) |
| Walnut Creek to Oldebroek | 5,456.09 mi (8,780.73 km) |
| Walnut Creek to Oldenzaal | 5,490.66 mi (8,836.36 km) |
| Walnut Creek to Ommen | 5,466.25 mi (8,797.08 km) |
| Walnut Creek to Oosterend | 5,430.91 mi (8,740.21 km) |
| Walnut Creek to Oosterhout | 5,470.72 mi (8,804.27 km) |
| Walnut Creek to Oosterwolde | 5,437.54 mi (8,750.88 km) |
| Walnut Creek to Oostzaan | 5,429.63 mi (8,738.14 km) |
| Walnut Creek to Opmeer | 5,417.32 mi (8,718.34 km) |
| Walnut Creek to Oss | 5,482.22 mi (8,822.78 km) |
| Walnut Creek to Oud-Beijerland | 5,448.94 mi (8,769.23 km) |
| Walnut Creek to Oudenbosch | 5,464.37 mi (8,794.05 km) |
