| Williamsport to Cehegin | 3,877.38 mi (6,240.05 km) |
| Williamsport to Cervello | 3,943.29 mi (6,346.12 km) |
| Williamsport to Cervera | 3,903.14 mi (6,281.49 km) |
| Williamsport to Ceuti | 3,902.90 mi (6,281.12 km) |
| Williamsport to Cheste | 3,884.10 mi (6,250.86 km) |
| Williamsport to Chiclana de la Frontera | 3,722.75 mi (5,991.18 km) |
| Williamsport to Chipiona | 3,698.54 mi (5,952.23 km) |
| Williamsport to Chiva | 3,882.72 mi (6,248.63 km) |
| Williamsport to Churriana de la Vega | 3,819.99 mi (6,147.68 km) |
| Williamsport to Ciempozuelos | 3,724.42 mi (5,993.87 km) |
| Williamsport to Cieza | 3,890.57 mi (6,261.26 km) |
| Williamsport to Cisterniga | 3,630.06 mi (5,842.02 km) |
| Williamsport to Ciudad de Melilla | 3,917.51 mi (6,304.62 km) |
| Williamsport to Ciudad Real | 3,747.44 mi (6,030.91 km) |
| Williamsport to Ciudad-Rodrigo | 3,573.10 mi (5,750.36 km) |
