| Nettuno to Oerlinghausen | 749.52 mi (1,206.23 km) |
| Nettuno to Oestrich-Winkel | 630.77 mi (1,015.12 km) |
| Nettuno to Offenburg | 535.89 mi (862.44 km) |
| Nettuno to Oftersheim | 580.66 mi (934.48 km) |
| Nettuno to Ohrdruf | 653.34 mi (1,051.45 km) |
| Nettuno to Ohringen | 555.88 mi (894.61 km) |
| Nettuno to Olbernhau | 636.45 mi (1,024.27 km) |
| Nettuno to Olching | 469.88 mi (756.20 km) |
| Nettuno to Oldenburg | 832.93 mi (1,340.48 km) |
| Nettuno to Oldenburg in Holstein | 890.46 mi (1,433.06 km) |
| Nettuno to Olfen | 750.82 mi (1,208.33 km) |
| Nettuno to Olpe | 698.71 mi (1,124.46 km) |
| Nettuno to Olsberg | 711.05 mi (1,144.33 km) |
| Nettuno to Oranienburg | 780.36 mi (1,255.87 km) |
| Nettuno to Ortenberg | 638.04 mi (1,026.83 km) |
