| Targu Secuiesc to Octeville | 1,305.50 mi (2,101.00 km) |
| Targu Secuiesc to Oignies | 1,104.08 mi (1,776.84 km) |
| Targu Secuiesc to Oissel | 1,182.42 mi (1,902.92 km) |
| Targu Secuiesc to Olivet | 1,146.19 mi (1,844.61 km) |
| Targu Secuiesc to Ollioules | 1,015.31 mi (1,633.98 km) |
| Targu Secuiesc to Olonne-sur-Mer | 1,326.82 mi (2,135.31 km) |
| Targu Secuiesc to Oloron-Sainte-Marie | 1,323.74 mi (2,130.36 km) |
| Targu Secuiesc to Onet Village | 1,148.07 mi (1,847.65 km) |
| Targu Secuiesc to Onnaing | 1,076.97 mi (1,733.21 km) |
| Targu Secuiesc to Orange | 1,045.62 mi (1,682.76 km) |
| Targu Secuiesc to Orchies | 1,093.20 mi (1,759.33 km) |
| Targu Secuiesc to Orleans | 1,145.68 mi (1,843.79 km) |
| Targu Secuiesc to Orly | 1,122.59 mi (1,806.64 km) |
| Targu Secuiesc to Ormesson-sur-Marne | 1,116.01 mi (1,796.05 km) |
| Targu Secuiesc to Orsay | 1,131.92 mi (1,821.65 km) |
