| Port Arthur to Nuth | 5,040.14 mi (8,111.32 km) |
| Port Arthur to Oegstgeest | 4,947.11 mi (7,961.60 km) |
| Port Arthur to Oirschot | 4,999.62 mi (8,046.12 km) |
| Port Arthur to Oisterwijk | 4,993.24 mi (8,035.84 km) |
| Port Arthur to Oldebroek | 4,993.63 mi (8,036.48 km) |
| Port Arthur to Oldenzaal | 5,036.72 mi (8,105.82 km) |
| Port Arthur to Ommen | 5,011.06 mi (8,064.52 km) |
| Port Arthur to Oosterend | 4,983.00 mi (8,019.36 km) |
| Port Arthur to Oosterhout | 4,978.19 mi (8,011.62 km) |
| Port Arthur to Oosterwolde | 4,991.80 mi (8,033.52 km) |
| Port Arthur to Oostzaan | 4,955.60 mi (7,975.27 km) |
| Port Arthur to Opmeer | 4,950.20 mi (7,966.58 km) |
| Port Arthur to Oss | 4,999.86 mi (8,046.50 km) |
| Port Arthur to Oud-Beijerland | 4,955.38 mi (7,974.91 km) |
| Port Arthur to Oudenbosch | 4,966.91 mi (7,993.48 km) |
