| Targu Frumos to Oberkirch | 879.82 mi (1,415.93 km) |
| Targu Frumos to Obernburg am Main | 835.60 mi (1,344.77 km) |
| Targu Frumos to Obernkirchen | 869.16 mi (1,398.78 km) |
| Targu Frumos to Oberschleissheim | 720.21 mi (1,159.07 km) |
| Targu Frumos to Oberstdorf | 782.55 mi (1,259.40 km) |
| Targu Frumos to Obertraubling | 694.69 mi (1,118.00 km) |
| Targu Frumos to Obertshausen | 850.87 mi (1,369.35 km) |
| Targu Frumos to Oberursel | 863.24 mi (1,389.25 km) |
| Targu Frumos to Ochsenfurt | 793.18 mi (1,276.50 km) |
| Targu Frumos to Ochsenhausen | 795.03 mi (1,279.47 km) |
| Targu Frumos to Ochtrup | 946.85 mi (1,523.80 km) |
| Targu Frumos to Odenthal | 934.38 mi (1,503.74 km) |
| Targu Frumos to Oelde | 901.19 mi (1,450.32 km) |
| Targu Frumos to Oelsnitz | 709.48 mi (1,141.80 km) |
| Targu Frumos to Oer-Erkenschwick | 935.97 mi (1,506.29 km) |
