| Solothurn to Cadiz | 1,022.19 mi (1,645.06 km) |
| Solothurn to Calafell | 509.60 mi (820.13 km) |
| Solothurn to Calahorra | 576.08 mi (927.11 km) |
| Solothurn to Calasparra | 776.73 mi (1,250.03 km) |
| Solothurn to Calatayud | 607.44 mi (977.58 km) |
| Solothurn to Caldas de Montbuy | 467.67 mi (752.64 km) |
| Solothurn to Caldas de Reyes | 851.12 mi (1,369.74 km) |
| Solothurn to Calella | 455.24 mi (732.64 km) |
| Solothurn to Callosa de Segura | 758.93 mi (1,221.39 km) |
| Solothurn to Calpe | 702.31 mi (1,130.25 km) |
| Solothurn to Calvia | 585.50 mi (942.28 km) |
| Solothurn to Camas | 967.09 mi (1,556.37 km) |
| Solothurn to Cambados | 861.71 mi (1,386.78 km) |
| Solothurn to Cambre | 816.48 mi (1,314.00 km) |
| Solothurn to Cambrils | 532.20 mi (856.50 km) |
