| Port Orange to Oerlinghausen | 4,648.85 mi (7,481.61 km) |
| Port Orange to Oestrich-Winkel | 4,665.35 mi (7,508.16 km) |
| Port Orange to Offenburg | 4,697.52 mi (7,559.93 km) |
| Port Orange to Oftersheim | 4,704.42 mi (7,571.03 km) |
| Port Orange to Ohrdruf | 4,759.18 mi (7,659.16 km) |
| Port Orange to Ohringen | 4,747.21 mi (7,639.90 km) |
| Port Orange to Olbernhau | 4,869.04 mi (7,835.96 km) |
| Port Orange to Olching | 4,849.38 mi (7,804.32 km) |
| Port Orange to Oldenburg | 4,605.24 mi (7,411.42 km) |
| Port Orange to Oldenburg in Holstein | 4,683.11 mi (7,536.73 km) |
| Port Orange to Olfen | 4,602.27 mi (7,406.63 km) |
| Port Orange to Olpe | 4,635.82 mi (7,460.63 km) |
| Port Orange to Olsberg | 4,655.12 mi (7,491.69 km) |
| Port Orange to Oranienburg | 4,811.07 mi (7,742.67 km) |
| Port Orange to Ortenberg | 4,701.29 mi (7,565.99 km) |
