| Targu Frumos to Nuth | 986.47 mi (1,587.57 km) |
| Targu Frumos to Oegstgeest | 1,059.48 mi (1,705.07 km) |
| Targu Frumos to Oirschot | 1,016.83 mi (1,636.43 km) |
| Targu Frumos to Oisterwijk | 1,021.93 mi (1,644.64 km) |
| Targu Frumos to Oldebroek | 1,003.74 mi (1,615.36 km) |
| Targu Frumos to Oldenzaal | 959.21 mi (1,543.70 km) |
| Targu Frumos to Ommen | 983.62 mi (1,582.98 km) |
| Targu Frumos to Oosterend | 1,006.14 mi (1,619.22 km) |
| Targu Frumos to Oosterhout | 1,037.10 mi (1,669.06 km) |
| Targu Frumos to Oosterwolde | 996.87 mi (1,604.30 km) |
| Targu Frumos to Oostzaan | 1,045.38 mi (1,682.37 km) |
| Targu Frumos to Opmeer | 1,046.43 mi (1,684.07 km) |
| Targu Frumos to Oss | 1,010.54 mi (1,626.31 km) |
| Targu Frumos to Oud-Beijerland | 1,058.21 mi (1,703.03 km) |
| Targu Frumos to Oudenbosch | 1,050.72 mi (1,690.97 km) |
