| River Grove to Noventa Vicentina | 4,634.37 mi (7,458.30 km) |
| River Grove to Novi di Modena | 4,625.98 mi (7,444.80 km) |
| River Grove to Novi Ligure | 4,548.07 mi (7,319.41 km) |
| River Grove to Nuoro | 4,754.23 mi (7,651.20 km) |
| River Grove to Occhiobello | 4,651.35 mi (7,485.62 km) |
| River Grove to Oderzo | 4,650.46 mi (7,484.19 km) |
| River Grove to Oggiono | 4,528.87 mi (7,288.51 km) |
| River Grove to Olbia | 4,735.87 mi (7,621.64 km) |
| River Grove to Oleggio | 4,508.15 mi (7,255.16 km) |
| River Grove to Olgiate Comasco | 4,513.87 mi (7,264.38 km) |
| River Grove to Olgiate Olona | 4,516.64 mi (7,268.83 km) |
| River Grove to Omegna | 4,488.12 mi (7,222.93 km) |
| River Grove to Opera | 4,539.83 mi (7,306.15 km) |
| River Grove to Oppeano | 4,620.10 mi (7,435.33 km) |
| River Grove to Orbassano | 4,488.36 mi (7,223.31 km) |
