| Targu Secuiesc to Orbetello | 777.61 mi (1,251.44 km) |
| Targu Secuiesc to Oria | 571.74 mi (920.12 km) |
| Targu Secuiesc to Oristano | 979.39 mi (1,576.17 km) |
| Targu Secuiesc to Orta Nova | 612.17 mi (985.19 km) |
| Targu Secuiesc to Orte | 722.35 mi (1,162.51 km) |
| Targu Secuiesc to Ortona | 633.24 mi (1,019.10 km) |
| Targu Secuiesc to Orvieto | 728.04 mi (1,171.66 km) |
| Targu Secuiesc to Orzinuovi | 781.85 mi (1,258.27 km) |
| Targu Secuiesc to Osimo | 644.22 mi (1,036.77 km) |
| Targu Secuiesc to Ospitaletto | 773.57 mi (1,244.94 km) |
| Targu Secuiesc to Ostuni | 562.48 mi (905.22 km) |
| Targu Secuiesc to Ottaviano | 683.82 mi (1,100.49 km) |
| Targu Secuiesc to Ovada | 853.36 mi (1,373.35 km) |
| Targu Secuiesc to Ozieri | 937.02 mi (1,507.98 km) |
| Targu Secuiesc to Paceco | 888.78 mi (1,430.35 km) |
