| Greenford to Noventa Vicentina | 693.75 mi (1,116.48 km) |
| Greenford to Novi di Modena | 690.39 mi (1,111.08 km) |
| Greenford to Novi Ligure | 628.49 mi (1,011.46 km) |
| Greenford to Nuoro | 902.01 mi (1,451.64 km) |
| Greenford to Occhiobello | 712.62 mi (1,146.85 km) |
| Greenford to Oderzo | 706.47 mi (1,136.96 km) |
| Greenford to Oggiono | 593.75 mi (955.54 km) |
| Greenford to Olbia | 869.70 mi (1,399.65 km) |
| Greenford to Oleggio | 579.32 mi (932.33 km) |
| Greenford to Olgiate Comasco | 580.91 mi (934.88 km) |
| Greenford to Olgiate Olona | 585.73 mi (942.64 km) |
| Greenford to Omegna | 557.74 mi (897.60 km) |
| Greenford to Opera | 609.37 mi (980.69 km) |
| Greenford to Oppeano | 680.53 mi (1,095.20 km) |
| Greenford to Orbassano | 577.79 mi (929.86 km) |
