| Sierpc to Castelfidardo | 708.64 mi (1,140.45 km) |
| Sierpc to Castelfiorentino | 754.87 mi (1,214.85 km) |
| Sierpc to Castelfranco di Sopra | 739.52 mi (1,190.15 km) |
| Sierpc to Castelfranco di Sotto | 754.13 mi (1,213.65 km) |
| Sierpc to Castelfranco Emilia | 693.10 mi (1,115.43 km) |
| Sierpc to Castelfranco Veneto | 607.64 mi (977.91 km) |
| Sierpc to Castellabate | 898.69 mi (1,446.31 km) |
| Sierpc to Castellammare del Golfo | 1,076.73 mi (1,732.83 km) |
| Sierpc to Castellammare di Stabia | 876.58 mi (1,410.72 km) |
| Sierpc to Castellamonte | 747.00 mi (1,202.18 km) |
| Sierpc to Castellana Grotte | 837.35 mi (1,347.58 km) |
| Sierpc to Castellaneta | 856.06 mi (1,377.70 km) |
| Sierpc to Castellanza | 697.05 mi (1,121.80 km) |
| Sierpc to Castellarano | 701.81 mi (1,129.45 km) |
| Sierpc to Castelleone | 688.46 mi (1,107.97 km) |
