| Castelnaudary to Navodari | 1,324.98 mi (2,132.35 km) |
| Castelnaudary to Negresti-Oas | 1,080.56 mi (1,738.99 km) |
| Castelnaudary to Nehoiu | 1,206.93 mi (1,942.37 km) |
| Castelnaudary to Ocna Mures | 1,090.05 mi (1,754.27 km) |
| Castelnaudary to Odobesti | 1,242.97 mi (2,000.36 km) |
| Castelnaudary to Odorheiu Secuiesc | 1,158.51 mi (1,864.44 km) |
| Castelnaudary to Oltenita | 1,229.43 mi (1,978.58 km) |
| Castelnaudary to Onesti | 1,228.48 mi (1,977.05 km) |
| Castelnaudary to Oradea | 1,003.12 mi (1,614.36 km) |
| Castelnaudary to Orastie | 1,056.79 mi (1,700.74 km) |
| Castelnaudary to Oravita | 982.45 mi (1,581.10 km) |
| Castelnaudary to Orsova | 1,017.58 mi (1,637.64 km) |
| Castelnaudary to Otelu Rosu | 1,015.27 mi (1,633.92 km) |
| Castelnaudary to Otopeni | 1,198.58 mi (1,928.93 km) |
| Castelnaudary to Ovidiu | 1,322.76 mi (2,128.77 km) |
