| Lockport to Nuth | 4,222.47 mi (6,795.41 km) |
| Lockport to Oegstgeest | 4,125.37 mi (6,639.14 km) |
| Lockport to Oirschot | 4,179.98 mi (6,727.03 km) |
| Lockport to Oisterwijk | 4,173.34 mi (6,716.34 km) |
| Lockport to Oldebroek | 4,168.22 mi (6,708.10 km) |
| Lockport to Oldenzaal | 4,210.27 mi (6,775.78 km) |
| Lockport to Ommen | 4,184.49 mi (6,734.29 km) |
| Lockport to Oosterend | 4,154.65 mi (6,686.27 km) |
| Lockport to Oosterhout | 4,158.57 mi (6,692.58 km) |
| Lockport to Oosterwolde | 4,163.17 mi (6,699.97 km) |
| Lockport to Oostzaan | 4,131.92 mi (6,649.68 km) |
| Lockport to Opmeer | 4,125.08 mi (6,638.68 km) |
| Lockport to Oss | 4,178.48 mi (6,724.62 km) |
| Lockport to Oud-Beijerland | 4,135.64 mi (6,655.67 km) |
| Lockport to Oudenbosch | 4,148.15 mi (6,675.81 km) |
