| Herndon to Nasaud | 4,784.77 mi (7,700.35 km) |
| Herndon to Navodari | 5,069.80 mi (8,159.05 km) |
| Herndon to Negresti-Oas | 4,724.02 mi (7,602.57 km) |
| Herndon to Nehoiu | 4,936.78 mi (7,944.97 km) |
| Herndon to Ocna Mures | 4,799.58 mi (7,724.18 km) |
| Herndon to Odobesti | 4,948.74 mi (7,964.23 km) |
| Herndon to Odorheiu Secuiesc | 4,858.35 mi (7,818.76 km) |
| Herndon to Oltenita | 5,002.89 mi (8,051.38 km) |
| Herndon to Onesti | 4,916.77 mi (7,912.78 km) |
| Herndon to Oradea | 4,697.29 mi (7,559.56 km) |
| Herndon to Orastie | 4,795.41 mi (7,717.47 km) |
| Herndon to Oravita | 4,767.31 mi (7,672.24 km) |
| Herndon to Orsova | 4,808.30 mi (7,738.21 km) |
| Herndon to Otelu Rosu | 4,775.11 mi (7,684.79 km) |
| Herndon to Otopeni | 4,961.19 mi (7,984.26 km) |
