| Letchworth to Nasaud | 1,143.00 mi (1,839.47 km) |
| Letchworth to Navodari | 1,419.33 mi (2,284.19 km) |
| Letchworth to Negresti-Oas | 1,084.44 mi (1,745.23 km) |
| Letchworth to Nehoiu | 1,285.66 mi (2,069.07 km) |
| Letchworth to Ocna Mures | 1,148.02 mi (1,847.57 km) |
| Letchworth to Odobesti | 1,303.46 mi (2,097.72 km) |
| Letchworth to Odorheiu Secuiesc | 1,211.05 mi (1,949.00 km) |
| Letchworth to Oltenita | 1,345.75 mi (2,165.78 km) |
| Letchworth to Onesti | 1,274.69 mi (2,051.42 km) |
| Letchworth to Oradea | 1,044.82 mi (1,681.48 km) |
| Letchworth to Orastie | 1,138.78 mi (1,832.69 km) |
| Letchworth to Oravita | 1,106.01 mi (1,779.95 km) |
| Letchworth to Orsova | 1,147.03 mi (1,845.97 km) |
| Letchworth to Otelu Rosu | 1,115.53 mi (1,795.27 km) |
| Letchworth to Otopeni | 1,304.83 mi (2,099.92 km) |
