| Allentown to Cehegin | 3,820.23 mi (6,148.07 km) |
| Allentown to Cervello | 3,892.93 mi (6,265.06 km) |
| Allentown to Cervera | 3,852.77 mi (6,200.44 km) |
| Allentown to Ceuti | 3,846.04 mi (6,189.60 km) |
| Allentown to Cheste | 3,829.51 mi (6,162.99 km) |
| Allentown to Chiclana de la Frontera | 3,660.86 mi (5,891.58 km) |
| Allentown to Chipiona | 3,636.92 mi (5,853.05 km) |
| Allentown to Chiva | 3,828.09 mi (6,160.72 km) |
| Allentown to Churriana de la Vega | 3,760.50 mi (6,051.94 km) |
| Allentown to Ciempozuelos | 3,669.15 mi (5,904.93 km) |
| Allentown to Cieza | 3,833.83 mi (6,169.96 km) |
| Allentown to Cisterniga | 3,576.39 mi (5,755.65 km) |
| Allentown to Ciudad de Melilla | 3,855.99 mi (6,205.61 km) |
| Allentown to Ciudad Real | 3,690.32 mi (5,939.00 km) |
| Allentown to Ciudad-Rodrigo | 3,516.92 mi (5,659.93 km) |
