| Washington to Noventa Vicentina | 878.23 mi (1,413.37 km) |
| Washington to Novi di Modena | 882.54 mi (1,420.31 km) |
| Washington to Novi Ligure | 835.88 mi (1,345.21 km) |
| Washington to Nuoro | 1,124.32 mi (1,809.41 km) |
| Washington to Occhiobello | 899.87 mi (1,448.21 km) |
| Washington to Oderzo | 879.41 mi (1,415.28 km) |
| Washington to Oggiono | 789.63 mi (1,270.79 km) |
| Washington to Olbia | 1,089.69 mi (1,753.69 km) |
| Washington to Oleggio | 781.95 mi (1,258.43 km) |
| Washington to Olgiate Comasco | 779.64 mi (1,254.70 km) |
| Washington to Olgiate Olona | 786.29 mi (1,265.41 km) |
| Washington to Omegna | 759.86 mi (1,222.88 km) |
| Washington to Opera | 809.47 mi (1,302.72 km) |
| Washington to Oppeano | 867.32 mi (1,395.82 km) |
| Washington to Orbassano | 791.83 mi (1,274.32 km) |
