| Williamsport to Cadiz | 3,711.65 mi (5,973.33 km) |
| Williamsport to Calafell | 3,931.94 mi (6,327.84 km) |
| Williamsport to Calahorra | 3,735.14 mi (6,011.13 km) |
| Williamsport to Calasparra | 3,877.49 mi (6,240.22 km) |
| Williamsport to Calatayud | 3,779.84 mi (6,083.06 km) |
| Williamsport to Caldas de Montbuy | 3,945.01 mi (6,348.88 km) |
| Williamsport to Caldas de Reyes | 3,417.28 mi (5,499.58 km) |
| Williamsport to Calella | 3,968.08 mi (6,386.01 km) |
| Williamsport to Callosa de Segura | 3,920.08 mi (6,308.76 km) |
| Williamsport to Calpe | 3,946.16 mi (6,350.73 km) |
| Williamsport to Calvia | 4,029.83 mi (6,485.39 km) |
| Williamsport to Camas | 3,696.36 mi (5,948.72 km) |
| Williamsport to Cambados | 3,412.49 mi (5,491.87 km) |
| Williamsport to Cambre | 3,413.24 mi (5,493.08 km) |
| Williamsport to Cambrils | 3,912.81 mi (6,297.06 km) |
