| Walker Mill to Nuth | 3,917.84 mi (6,305.16 km) |
| Walker Mill to Oegstgeest | 3,828.99 mi (6,162.17 km) |
| Walker Mill to Oirschot | 3,879.28 mi (6,243.09 km) |
| Walker Mill to Oisterwijk | 3,873.15 mi (6,233.24 km) |
| Walker Mill to Oldebroek | 3,878.79 mi (6,242.31 km) |
| Walker Mill to Oldenzaal | 3,922.65 mi (6,312.90 km) |
| Walker Mill to Ommen | 3,897.29 mi (6,272.08 km) |
| Walker Mill to Oosterend | 3,871.30 mi (6,230.25 km) |
| Walker Mill to Oosterhout | 3,857.94 mi (6,208.76 km) |
| Walker Mill to Oosterwolde | 3,880.34 mi (6,244.81 km) |
| Walker Mill to Oostzaan | 3,839.29 mi (6,178.74 km) |
| Walker Mill to Opmeer | 3,835.35 mi (6,172.41 km) |
| Walker Mill to Oss | 3,881.08 mi (6,246.00 km) |
| Walker Mill to Oud-Beijerland | 3,835.38 mi (6,172.44 km) |
| Walker Mill to Oudenbosch | 3,845.99 mi (6,189.52 km) |
