| Sierpc to Noventa Vicentina | 640.38 mi (1,030.59 km) |
| Sierpc to Novi di Modena | 679.63 mi (1,093.76 km) |
| Sierpc to Novi Ligure | 746.77 mi (1,201.81 km) |
| Sierpc to Nuoro | 994.98 mi (1,601.26 km) |
| Sierpc to Occhiobello | 660.50 mi (1,062.98 km) |
| Sierpc to Oderzo | 586.86 mi (944.46 km) |
| Sierpc to Oggiono | 674.31 mi (1,085.19 km) |
| Sierpc to Olbia | 953.91 mi (1,535.17 km) |
| Sierpc to Oleggio | 706.28 mi (1,136.64 km) |
| Sierpc to Olgiate Comasco | 686.19 mi (1,104.32 km) |
| Sierpc to Olgiate Olona | 696.70 mi (1,121.23 km) |
| Sierpc to Omegna | 699.07 mi (1,125.04 km) |
| Sierpc to Opera | 699.83 mi (1,126.27 km) |
| Sierpc to Oppeano | 648.56 mi (1,043.76 km) |
| Sierpc to Orbassano | 772.08 mi (1,242.54 km) |
