| Cities | Distance |
|---|---|
| Sierpc to Orbetello | 820.58 mi (1,320.60 km) |
| Sierpc to Oria | 860.92 mi (1,385.52 km) |
| Sierpc to Oristano | 1,037.75 mi (1,670.10 km) |
| Sierpc to Orta Nova | 819.26 mi (1,318.47 km) |
| Sierpc to Orte | 794.87 mi (1,279.22 km) |
| Sierpc to Ortona | 767.48 mi (1,235.14 km) |
| Sierpc to Orvieto | 784.00 mi (1,261.73 km) |
| Sierpc to Orzinuovi | 677.68 mi (1,090.62 km) |
| Sierpc to Osimo | 708.56 mi (1,140.31 km) |
| Sierpc to Ospitaletto | 665.03 mi (1,070.25 km) |
| Sierpc to Ostuni | 845.15 mi (1,360.14 km) |
| Sierpc to Ottaviano | 866.23 mi (1,394.06 km) |
| Sierpc to Ovada | 757.51 mi (1,219.09 km) |
| Sierpc to Ozieri | 986.08 mi (1,586.94 km) |
| Sierpc to Paceco | 1,084.47 mi (1,745.29 km) |