| Sighetu Marmatiei to Oerlinghausen | 730.43 mi (1,175.51 km) |
| Sighetu Marmatiei to Oestrich-Winkel | 733.50 mi (1,180.45 km) |
| Sighetu Marmatiei to Offenburg | 734.61 mi (1,182.23 km) |
| Sighetu Marmatiei to Oftersheim | 704.58 mi (1,133.91 km) |
| Sighetu Marmatiei to Ohrdruf | 623.94 mi (1,004.13 km) |
| Sighetu Marmatiei to Ohringen | 662.90 mi (1,066.83 km) |
| Sighetu Marmatiei to Olbernhau | 511.43 mi (823.07 km) |
| Sighetu Marmatiei to Olching | 580.34 mi (933.97 km) |
| Sighetu Marmatiei to Oldenburg | 774.84 mi (1,246.98 km) |
| Sighetu Marmatiei to Oldenburg in Holstein | 713.81 mi (1,148.76 km) |
| Sighetu Marmatiei to Olfen | 779.01 mi (1,253.69 km) |
| Sighetu Marmatiei to Olpe | 750.19 mi (1,207.31 km) |
| Sighetu Marmatiei to Olsberg | 727.24 mi (1,170.37 km) |
| Sighetu Marmatiei to Oranienburg | 575.22 mi (925.72 km) |
| Sighetu Marmatiei to Ortenberg | 690.00 mi (1,110.45 km) |
