| Portage to Oerlinghausen | 4,167.51 mi (6,706.95 km) |
| Portage to Oestrich-Winkel | 4,214.98 mi (6,783.35 km) |
| Portage to Offenburg | 4,269.57 mi (6,871.21 km) |
| Portage to Oftersheim | 4,260.43 mi (6,856.50 km) |
| Portage to Ohrdruf | 4,284.93 mi (6,895.93 km) |
| Portage to Ohringen | 4,301.40 mi (6,922.43 km) |
| Portage to Olbernhau | 4,385.11 mi (7,057.16 km) |
| Portage to Olching | 4,408.76 mi (7,095.21 km) |
| Portage to Oldenburg | 4,108.97 mi (6,612.75 km) |
| Portage to Oldenburg in Holstein | 4,160.43 mi (6,695.56 km) |
| Portage to Olfen | 4,129.76 mi (6,646.21 km) |
| Portage to Olpe | 4,171.54 mi (6,713.44 km) |
| Portage to Olsberg | 4,183.31 mi (6,732.39 km) |
| Portage to Oranienburg | 4,299.71 mi (6,919.71 km) |
| Portage to Ortenberg | 4,241.14 mi (6,825.45 km) |
