| Oldenburg in Holstein to Oria | 1,003.26 mi (1,614.59 km) |
| Oldenburg in Holstein to Oristano | 1,000.23 mi (1,609.71 km) |
| Oldenburg in Holstein to Orta Nova | 923.11 mi (1,485.60 km) |
| Oldenburg in Holstein to Orte | 820.90 mi (1,321.10 km) |
| Oldenburg in Holstein to Ortona | 841.05 mi (1,353.54 km) |
| Oldenburg in Holstein to Orvieto | 802.15 mi (1,290.94 km) |
| Oldenburg in Holstein to Orzinuovi | 616.37 mi (991.95 km) |
| Oldenburg in Holstein to Osimo | 756.50 mi (1,217.47 km) |
| Oldenburg in Holstein to Ospitaletto | 605.26 mi (974.08 km) |
| Oldenburg in Holstein to Ostuni | 987.04 mi (1,588.49 km) |
| Oldenburg in Holstein to Ottaviano | 943.97 mi (1,519.17 km) |
| Oldenburg in Holstein to Ovada | 674.92 mi (1,086.18 km) |
| Oldenburg in Holstein to Ozieri | 951.60 mi (1,531.45 km) |
| Oldenburg in Holstein to Paceco | 1,130.11 mi (1,818.74 km) |
| Oldenburg in Holstein to Pachino | 1,231.37 mi (1,981.70 km) |
