| West Columbia to Nuth | 4,319.20 mi (6,951.09 km) |
| West Columbia to Oegstgeest | 4,231.81 mi (6,810.44 km) |
| West Columbia to Oirschot | 4,281.34 mi (6,890.15 km) |
| West Columbia to Oisterwijk | 4,275.31 mi (6,880.44 km) |
| West Columbia to Oldebroek | 4,282.47 mi (6,891.97 km) |
| West Columbia to Oldenzaal | 4,326.49 mi (6,962.82 km) |
| West Columbia to Ommen | 4,301.23 mi (6,922.16 km) |
| West Columbia to Oosterend | 4,275.79 mi (6,881.22 km) |
| West Columbia to Oosterhout | 4,260.07 mi (6,855.91 km) |
| West Columbia to Oosterwolde | 4,284.89 mi (6,895.86 km) |
| West Columbia to Oostzaan | 4,242.62 mi (6,827.83 km) |
| West Columbia to Opmeer | 4,239.09 mi (6,822.15 km) |
| West Columbia to Oss | 4,283.63 mi (6,893.84 km) |
| West Columbia to Oud-Beijerland | 4,237.61 mi (6,819.77 km) |
| West Columbia to Oudenbosch | 4,247.90 mi (6,836.33 km) |
