| Clarkston to Noventa Vicentina | 4,859.29 mi (7,820.28 km) |
| Clarkston to Novi di Modena | 4,845.03 mi (7,797.33 km) |
| Clarkston to Novi Ligure | 4,757.63 mi (7,656.67 km) |
| Clarkston to Nuoro | 4,926.61 mi (7,928.61 km) |
| Clarkston to Occhiobello | 4,873.34 mi (7,842.88 km) |
| Clarkston to Oderzo | 4,883.41 mi (7,859.09 km) |
| Clarkston to Oggiono | 4,749.74 mi (7,643.97 km) |
| Clarkston to Olbia | 4,914.26 mi (7,908.73 km) |
| Clarkston to Oleggio | 4,724.66 mi (7,603.60 km) |
| Clarkston to Olgiate Comasco | 4,733.29 mi (7,617.49 km) |
| Clarkston to Olgiate Olona | 4,734.40 mi (7,619.27 km) |
| Clarkston to Omegna | 4,706.28 mi (7,574.02 km) |
| Clarkston to Opera | 4,756.63 mi (7,655.06 km) |
| Clarkston to Oppeano | 4,843.79 mi (7,795.33 km) |
| Clarkston to Orbassano | 4,695.33 mi (7,556.41 km) |
