| Calne to Nasaud | 1,215.49 mi (1,956.14 km) |
| Calne to Navodari | 1,488.75 mi (2,395.90 km) |
| Calne to Negresti-Oas | 1,157.64 mi (1,863.04 km) |
| Calne to Nehoiu | 1,355.24 mi (2,181.05 km) |
| Calne to Ocna Mures | 1,217.89 mi (1,960.00 km) |
| Calne to Odobesti | 1,374.59 mi (2,212.18 km) |
| Calne to Odorheiu Secuiesc | 1,281.97 mi (2,063.12 km) |
| Calne to Oltenita | 1,412.81 mi (2,273.69 km) |
| Calne to Onesti | 1,346.63 mi (2,167.20 km) |
| Calne to Oradea | 1,114.73 mi (1,793.98 km) |
| Calne to Orastie | 1,206.61 mi (1,941.86 km) |
| Calne to Oravita | 1,169.85 mi (1,882.69 km) |
| Calne to Orsova | 1,210.88 mi (1,948.73 km) |
| Calne to Otelu Rosu | 1,181.54 mi (1,901.51 km) |
| Calne to Otopeni | 1,372.36 mi (2,208.61 km) |
