| Giurgiu to Oerlinghausen | 972.02 mi (1,564.31 km) |
| Giurgiu to Oestrich-Winkel | 943.45 mi (1,518.33 km) |
| Giurgiu to Offenburg | 916.19 mi (1,474.46 km) |
| Giurgiu to Oftersheim | 904.65 mi (1,455.89 km) |
| Giurgiu to Ohrdruf | 856.39 mi (1,378.22 km) |
| Giurgiu to Ohringen | 861.79 mi (1,386.92 km) |
| Giurgiu to Olbernhau | 752.96 mi (1,211.77 km) |
| Giurgiu to Olching | 761.48 mi (1,225.49 km) |
| Giurgiu to Oldenburg | 1,028.83 mi (1,655.74 km) |
| Giurgiu to Oldenburg in Holstein | 987.09 mi (1,588.57 km) |
| Giurgiu to Olfen | 1,013.35 mi (1,630.82 km) |
| Giurgiu to Olpe | 975.92 mi (1,570.59 km) |
| Giurgiu to Olsberg | 959.78 mi (1,544.61 km) |
| Giurgiu to Oranienburg | 844.11 mi (1,358.46 km) |
| Giurgiu to Ortenberg | 908.83 mi (1,462.62 km) |
