| Helston to Nasaud | 1,358.26 mi (2,185.91 km) |
| Helston to Navodari | 1,624.46 mi (2,614.32 km) |
| Helston to Negresti-Oas | 1,302.02 mi (2,095.40 km) |
| Helston to Nehoiu | 1,491.77 mi (2,400.78 km) |
| Helston to Ocna Mures | 1,355.57 mi (2,181.58 km) |
| Helston to Odobesti | 1,514.07 mi (2,436.67 km) |
| Helston to Odorheiu Secuiesc | 1,421.40 mi (2,287.52 km) |
| Helston to Oltenita | 1,544.18 mi (2,485.12 km) |
| Helston to Onesti | 1,487.84 mi (2,394.44 km) |
| Helston to Oradea | 1,253.03 mi (2,016.56 km) |
| Helston to Orastie | 1,340.47 mi (2,157.27 km) |
| Helston to Oravita | 1,296.34 mi (2,086.25 km) |
| Helston to Orsova | 1,337.13 mi (2,151.90 km) |
| Helston to Otelu Rosu | 1,312.07 mi (2,111.58 km) |
| Helston to Otopeni | 1,504.84 mi (2,421.81 km) |
