| Targu Secuiesc to Oerlinghausen | 890.16 mi (1,432.58 km) |
| Targu Secuiesc to Oestrich-Winkel | 880.53 mi (1,417.08 km) |
| Targu Secuiesc to Offenburg | 868.90 mi (1,398.37 km) |
| Targu Secuiesc to Oftersheim | 847.02 mi (1,363.15 km) |
| Targu Secuiesc to Ohrdruf | 779.51 mi (1,254.50 km) |
| Targu Secuiesc to Ohringen | 804.39 mi (1,294.55 km) |
| Targu Secuiesc to Olbernhau | 669.68 mi (1,077.75 km) |
| Targu Secuiesc to Olching | 712.45 mi (1,146.58 km) |
| Targu Secuiesc to Oldenburg | 939.00 mi (1,511.18 km) |
| Targu Secuiesc to Oldenburg in Holstein | 882.96 mi (1,420.98 km) |
| Targu Secuiesc to Olfen | 936.27 mi (1,506.79 km) |
| Targu Secuiesc to Olpe | 903.93 mi (1,454.73 km) |
| Targu Secuiesc to Olsberg | 883.53 mi (1,421.91 km) |
| Targu Secuiesc to Oranienburg | 743.07 mi (1,195.86 km) |
| Targu Secuiesc to Ortenberg | 840.48 mi (1,352.62 km) |
