| Port Arthur to Oerlinghausen | 5,113.05 mi (8,228.66 km) |
| Port Arthur to Oestrich-Winkel | 5,151.96 mi (8,291.28 km) |
| Port Arthur to Offenburg | 5,199.83 mi (8,368.32 km) |
| Port Arthur to Oftersheim | 5,195.72 mi (8,361.71 km) |
| Port Arthur to Ohrdruf | 5,229.15 mi (8,415.51 km) |
| Port Arthur to Ohringen | 5,237.48 mi (8,428.91 km) |
| Port Arthur to Olbernhau | 5,332.40 mi (8,581.67 km) |
| Port Arthur to Olching | 5,343.85 mi (8,600.09 km) |
| Port Arthur to Oldenburg | 5,058.09 mi (8,140.21 km) |
| Port Arthur to Oldenburg in Holstein | 5,115.93 mi (8,233.29 km) |
| Port Arthur to Olfen | 5,072.70 mi (8,163.72 km) |
| Port Arthur to Olpe | 5,112.37 mi (8,227.57 km) |
| Port Arthur to Olsberg | 5,126.34 mi (8,250.04 km) |
| Port Arthur to Oranienburg | 5,253.28 mi (8,454.34 km) |
| Port Arthur to Ortenberg | 5,181.16 mi (8,338.27 km) |
