| Castle Rock to Nasaud | 5,685.28 mi (9,149.57 km) |
| Castle Rock to Navodari | 5,969.62 mi (9,607.17 km) |
| Castle Rock to Negresti-Oas | 5,625.27 mi (9,053.00 km) |
| Castle Rock to Nehoiu | 5,846.36 mi (9,408.81 km) |
| Castle Rock to Ocna Mures | 5,718.72 mi (9,203.38 km) |
| Castle Rock to Odobesti | 5,844.52 mi (9,405.84 km) |
| Castle Rock to Odorheiu Secuiesc | 5,764.26 mi (9,276.69 km) |
| Castle Rock to Oltenita | 5,926.96 mi (9,538.53 km) |
| Castle Rock to Onesti | 5,808.55 mi (9,347.95 km) |
| Castle Rock to Oradea | 5,624.97 mi (9,052.51 km) |
| Castle Rock to Orastie | 5,728.96 mi (9,219.87 km) |
| Castle Rock to Oravita | 5,727.37 mi (9,217.31 km) |
| Castle Rock to Orsova | 5,766.06 mi (9,279.58 km) |
| Castle Rock to Otelu Rosu | 5,721.75 mi (9,208.26 km) |
| Castle Rock to Otopeni | 5,884.62 mi (9,470.38 km) |
