| Cuellar to Nasaud | 1,466.86 mi (2,360.68 km) |
| Cuellar to Navodari | 1,668.42 mi (2,685.06 km) |
| Cuellar to Negresti-Oas | 1,426.11 mi (2,295.11 km) |
| Cuellar to Nehoiu | 1,552.02 mi (2,497.73 km) |
| Cuellar to Ocna Mures | 1,436.17 mi (2,311.29 km) |
| Cuellar to Odobesti | 1,588.57 mi (2,556.56 km) |
| Cuellar to Odorheiu Secuiesc | 1,504.56 mi (2,421.35 km) |
| Cuellar to Oltenita | 1,572.03 mi (2,529.94 km) |
| Cuellar to Onesti | 1,574.49 mi (2,533.89 km) |
| Cuellar to Oradea | 1,349.23 mi (2,171.38 km) |
| Cuellar to Orastie | 1,402.52 mi (2,257.14 km) |
| Cuellar to Oravita | 1,326.96 mi (2,135.54 km) |
| Cuellar to Orsova | 1,361.38 mi (2,190.92 km) |
| Cuellar to Otelu Rosu | 1,360.61 mi (2,189.69 km) |
| Cuellar to Otopeni | 1,542.20 mi (2,481.93 km) |
