| Greenbelt to Noventa Vicentina | 4,316.29 mi (6,946.39 km) |
| Greenbelt to Novi di Modena | 4,302.20 mi (6,923.72 km) |
| Greenbelt to Novi Ligure | 4,215.17 mi (6,783.65 km) |
| Greenbelt to Nuoro | 4,387.48 mi (7,060.97 km) |
| Greenbelt to Occhiobello | 4,330.42 mi (6,969.13 km) |
| Greenbelt to Oderzo | 4,340.27 mi (6,984.99 km) |
| Greenbelt to Oggiono | 4,206.81 mi (6,770.21 km) |
| Greenbelt to Olbia | 4,374.43 mi (7,039.96 km) |
| Greenbelt to Oleggio | 4,181.87 mi (6,730.07 km) |
| Greenbelt to Olgiate Comasco | 4,190.40 mi (6,743.80 km) |
| Greenbelt to Olgiate Olona | 4,191.56 mi (6,745.67 km) |
| Greenbelt to Omegna | 4,163.42 mi (6,700.37 km) |
| Greenbelt to Opera | 4,213.85 mi (6,781.53 km) |
| Greenbelt to Oppeano | 4,300.81 mi (6,921.49 km) |
| Greenbelt to Orbassano | 4,152.97 mi (6,683.56 km) |
