| Targu Secuiesc to Opole | 495.70 mi (797.75 km) |
| Targu Secuiesc to Orzesze | 445.45 mi (716.89 km) |
| Targu Secuiesc to Osowa | 673.11 mi (1,083.27 km) |
| Targu Secuiesc to Ostroda | 598.58 mi (963.31 km) |
| Targu Secuiesc to Ostroleka | 529.52 mi (852.18 km) |
| Targu Secuiesc to Ostrow Mazowiecka | 507.03 mi (815.98 km) |
| Targu Secuiesc to Ostrow Wielkopolski | 543.33 mi (874.40 km) |
| Targu Secuiesc to Ostrowiec Swietokrzyski | 404.16 mi (650.43 km) |
| Targu Secuiesc to Ostrzeszow | 528.79 mi (851.01 km) |
| Targu Secuiesc to Oswiecim | 424.21 mi (682.70 km) |
| Targu Secuiesc to Otwock | 476.70 mi (767.17 km) |
| Targu Secuiesc to Ozarow Mazowiecki | 492.67 mi (792.88 km) |
| Targu Secuiesc to Ozimek | 486.32 mi (782.65 km) |
| Targu Secuiesc to Ozorkow | 516.07 mi (830.53 km) |
| Targu Secuiesc to Pabianice | 496.60 mi (799.20 km) |
