| Enna to Oerlinghausen | 1,031.74 mi (1,660.43 km) |
| Enna to Oestrich-Winkel | 913.73 mi (1,470.51 km) |
| Enna to Offenburg | 817.95 mi (1,316.37 km) |
| Enna to Oftersheim | 863.65 mi (1,389.91 km) |
| Enna to Ohrdruf | 932.88 mi (1,501.32 km) |
| Enna to Ohringen | 838.58 mi (1,349.57 km) |
| Enna to Olbernhau | 906.54 mi (1,458.94 km) |
| Enna to Olching | 749.89 mi (1,206.83 km) |
| Enna to Oldenburg | 1,115.03 mi (1,794.47 km) |
| Enna to Oldenburg in Holstein | 1,167.49 mi (1,878.89 km) |
| Enna to Olfen | 1,033.81 mi (1,663.75 km) |
| Enna to Olpe | 981.69 mi (1,579.88 km) |
| Enna to Olsberg | 993.70 mi (1,599.20 km) |
| Enna to Oranienburg | 1,050.79 mi (1,691.09 km) |
| Enna to Ortenberg | 920.64 mi (1,481.62 km) |
