| Williamsport to Carmona | 3,713.67 mi (5,976.58 km) |
| Williamsport to Cartagena | 3,932.89 mi (6,329.37 km) |
| Williamsport to Cartama | 3,787.07 mi (6,094.71 km) |
| Williamsport to Cartaya | 3,645.84 mi (5,867.41 km) |
| Williamsport to Caspe | 3,857.35 mi (6,207.80 km) |
| Williamsport to Cassa de la Selva | 3,968.58 mi (6,386.81 km) |
| Williamsport to Castalla | 3,914.05 mi (6,299.06 km) |
| Williamsport to Castellbisbal | 3,941.71 mi (6,343.57 km) |
| Williamsport to Castelldefels | 3,947.93 mi (6,353.58 km) |
| Williamsport to Castello de Ampurias | 3,965.46 mi (6,381.79 km) |
| Williamsport to Castellon de la Plana | 3,897.97 mi (6,273.18 km) |
| Williamsport to Castilleja de la Cuesta | 3,696.15 mi (5,948.38 km) |
| Williamsport to Catarroja | 3,899.77 mi (6,276.07 km) |
| Williamsport to Catral | 3,922.38 mi (6,312.47 km) |
| Williamsport to Caudete | 3,895.47 mi (6,269.15 km) |
