| Solothurn to Castelfidardo | 390.29 mi (628.12 km) |
| Solothurn to Castelfiorentino | 300.23 mi (483.18 km) |
| Solothurn to Castelfranco di Sopra | 315.72 mi (508.10 km) |
| Solothurn to Castelfranco di Sotto | 288.63 mi (464.51 km) |
| Solothurn to Castelfranco Emilia | 247.74 mi (398.70 km) |
| Solothurn to Castelfranco Veneto | 235.23 mi (378.57 km) |
| Solothurn to Castellabate | 605.15 mi (973.89 km) |
| Solothurn to Castellammare del Golfo | 690.31 mi (1,110.95 km) |
| Solothurn to Castellammare di Stabia | 567.36 mi (913.08 km) |
| Solothurn to Castellamonte | 127.05 mi (204.47 km) |
| Solothurn to Castellana Grotte | 647.46 mi (1,041.98 km) |
| Solothurn to Castellaneta | 651.60 mi (1,048.65 km) |
| Solothurn to Castellanza | 128.29 mi (206.46 km) |
| Solothurn to Castellarano | 240.69 mi (387.35 km) |
| Solothurn to Castelleone | 170.10 mi (273.75 km) |
