| San Salvo to Oerlinghausen | 742.02 mi (1,194.17 km) |
| San Salvo to Oestrich-Winkel | 636.86 mi (1,024.93 km) |
| San Salvo to Offenburg | 552.84 mi (889.71 km) |
| San Salvo to Oftersheim | 586.15 mi (943.31 km) |
| San Salvo to Ohrdruf | 635.74 mi (1,023.13 km) |
| San Salvo to Ohringen | 554.89 mi (893.01 km) |
| San Salvo to Olbernhau | 599.36 mi (964.57 km) |
| San Salvo to Olching | 456.54 mi (734.73 km) |
| San Salvo to Oldenburg | 823.93 mi (1,325.99 km) |
| San Salvo to Oldenburg in Holstein | 864.74 mi (1,391.66 km) |
| San Salvo to Olfen | 752.05 mi (1,210.31 km) |
| San Salvo to Olpe | 700.50 mi (1,127.35 km) |
| San Salvo to Olsberg | 707.16 mi (1,138.06 km) |
| San Salvo to Oranienburg | 743.16 mi (1,196.01 km) |
| San Salvo to Ortenberg | 634.66 mi (1,021.38 km) |
