| Greenford to Nasaud | 1,144.87 mi (1,842.50 km) |
| Greenford to Navodari | 1,419.10 mi (2,283.82 km) |
| Greenford to Negresti-Oas | 1,086.84 mi (1,749.10 km) |
| Greenford to Nehoiu | 1,285.52 mi (2,068.85 km) |
| Greenford to Ocna Mures | 1,148.05 mi (1,847.61 km) |
| Greenford to Odobesti | 1,304.38 mi (2,099.20 km) |
| Greenford to Odorheiu Secuiesc | 1,211.81 mi (1,950.22 km) |
| Greenford to Oltenita | 1,344.00 mi (2,162.96 km) |
| Greenford to Onesti | 1,276.19 mi (2,053.83 km) |
| Greenford to Oradea | 1,044.86 mi (1,681.54 km) |
| Greenford to Orastie | 1,137.48 mi (1,830.59 km) |
| Greenford to Oravita | 1,102.28 mi (1,773.94 km) |
| Greenford to Orsova | 1,143.32 mi (1,840.00 km) |
| Greenford to Otelu Rosu | 1,113.09 mi (1,791.34 km) |
| Greenford to Otopeni | 1,303.37 mi (2,097.57 km) |
