| Clarksburg to Noventa Vicentina | 4,322.67 mi (6,956.67 km) |
| Clarksburg to Novi di Modena | 4,308.86 mi (6,934.44 km) |
| Clarksburg to Novi Ligure | 4,222.23 mi (6,795.03 km) |
| Clarksburg to Nuoro | 4,396.32 mi (7,075.20 km) |
| Clarksburg to Occhiobello | 4,336.95 mi (6,979.65 km) |
| Clarksburg to Oderzo | 4,346.28 mi (6,994.66 km) |
| Clarksburg to Oggiono | 4,213.34 mi (6,780.71 km) |
| Clarksburg to Olbia | 4,383.00 mi (7,053.76 km) |
| Clarksburg to Oleggio | 4,188.59 mi (6,740.89 km) |
| Clarksburg to Olgiate Comasco | 4,196.99 mi (6,754.40 km) |
| Clarksburg to Olgiate Olona | 4,198.23 mi (6,756.40 km) |
| Clarksburg to Omegna | 4,170.06 mi (6,711.06 km) |
| Clarksburg to Opera | 4,220.57 mi (6,792.35 km) |
| Clarksburg to Oppeano | 4,307.25 mi (6,931.85 km) |
| Clarksburg to Orbassano | 4,160.13 mi (6,695.08 km) |
