| Osterholz-Scharmbeck to Oria | 970.99 mi (1,562.66 km) |
| Osterholz-Scharmbeck to Oristano | 919.75 mi (1,480.19 km) |
| Osterholz-Scharmbeck to Orta Nova | 881.84 mi (1,419.18 km) |
| Osterholz-Scharmbeck to Orte | 761.32 mi (1,225.23 km) |
| Osterholz-Scharmbeck to Ortona | 793.94 mi (1,277.73 km) |
| Osterholz-Scharmbeck to Orvieto | 741.15 mi (1,192.76 km) |
| Osterholz-Scharmbeck to Orzinuovi | 542.47 mi (873.02 km) |
| Osterholz-Scharmbeck to Osimo | 705.67 mi (1,135.67 km) |
| Osterholz-Scharmbeck to Ospitaletto | 532.42 mi (856.84 km) |
| Osterholz-Scharmbeck to Ostuni | 955.09 mi (1,537.07 km) |
| Osterholz-Scharmbeck to Ottaviano | 894.60 mi (1,439.72 km) |
| Osterholz-Scharmbeck to Ovada | 592.69 mi (953.84 km) |
| Osterholz-Scharmbeck to Ozieri | 872.82 mi (1,404.68 km) |
| Osterholz-Scharmbeck to Paceco | 1,067.64 mi (1,718.21 km) |
| Osterholz-Scharmbeck to Pachino | 1,179.77 mi (1,898.66 km) |
