| Willow Grove to Nuth | 3,789.10 mi (6,097.98 km) |
| Willow Grove to Oegstgeest | 3,700.20 mi (5,954.89 km) |
| Willow Grove to Oirschot | 3,750.50 mi (6,035.85 km) |
| Willow Grove to Oisterwijk | 3,744.38 mi (6,026.00 km) |
| Willow Grove to Oldebroek | 3,749.97 mi (6,035.00 km) |
| Willow Grove to Oldenzaal | 3,793.84 mi (6,105.59 km) |
| Willow Grove to Ommen | 3,768.47 mi (6,064.77 km) |
| Willow Grove to Oosterend | 3,742.48 mi (6,022.94 km) |
| Willow Grove to Oosterhout | 3,729.17 mi (6,001.52 km) |
| Willow Grove to Oosterwolde | 3,751.53 mi (6,037.51 km) |
| Willow Grove to Oostzaan | 3,710.48 mi (5,971.44 km) |
| Willow Grove to Opmeer | 3,706.54 mi (5,965.10 km) |
| Willow Grove to Oss | 3,752.29 mi (6,038.73 km) |
| Willow Grove to Oud-Beijerland | 3,706.60 mi (5,965.20 km) |
| Willow Grove to Oudenbosch | 3,717.22 mi (5,982.29 km) |
