| Targu Secuiesc to Nasaud | 121.09 mi (194.88 km) |
| Targu Secuiesc to Navodari | 167.08 mi (268.88 km) |
| Targu Secuiesc to Negresti-Oas | 182.09 mi (293.04 km) |
| Targu Secuiesc to Nehoiu | 45.18 mi (72.72 km) |
| Targu Secuiesc to Ocna Mures | 112.40 mi (180.90 km) |
| Targu Secuiesc to Odobesti | 47.30 mi (76.12 km) |
| Targu Secuiesc to Odorheiu Secuiesc | 45.74 mi (73.60 km) |
| Targu Secuiesc to Oltenita | 134.19 mi (215.95 km) |
| Targu Secuiesc to Onesti | 35.11 mi (56.51 km) |
| Targu Secuiesc to Oradea | 213.84 mi (344.14 km) |
| Targu Secuiesc to Orastie | 141.69 mi (228.03 km) |
| Targu Secuiesc to Oravita | 225.55 mi (362.99 km) |
| Targu Secuiesc to Orsova | 201.88 mi (324.89 km) |
| Targu Secuiesc to Otelu Rosu | 185.54 mi (298.60 km) |
| Targu Secuiesc to Otopeni | 100.03 mi (160.98 km) |
