| Targu-Mures to Oerlinghausen | 806.42 mi (1,297.81 km) |
| Targu-Mures to Oestrich-Winkel | 796.25 mi (1,281.44 km) |
| Targu-Mures to Offenburg | 785.78 mi (1,264.59 km) |
| Targu-Mures to Oftersheim | 763.00 mi (1,227.94 km) |
| Targu-Mures to Ohrdruf | 695.34 mi (1,119.04 km) |
| Targu-Mures to Ohringen | 720.43 mi (1,159.41 km) |
| Targu-Mures to Olbernhau | 585.87 mi (942.87 km) |
| Targu-Mures to Olching | 629.41 mi (1,012.94 km) |
| Targu-Mures to Oldenburg | 856.32 mi (1,378.11 km) |
| Targu-Mures to Oldenburg in Holstein | 803.52 mi (1,293.15 km) |
| Targu-Mures to Olfen | 852.19 mi (1,371.47 km) |
| Targu-Mures to Olpe | 819.61 mi (1,319.04 km) |
| Targu-Mures to Olsberg | 799.38 mi (1,286.48 km) |
| Targu-Mures to Oranienburg | 662.53 mi (1,066.23 km) |
| Targu-Mures to Ortenberg | 756.11 mi (1,216.84 km) |
