| Allentown to Carmona | 3,653.49 mi (5,879.72 km) |
| Allentown to Cartagena | 3,875.54 mi (6,237.08 km) |
| Allentown to Cartama | 3,726.44 mi (5,997.12 km) |
| Allentown to Cartaya | 3,584.56 mi (5,768.79 km) |
| Allentown to Caspe | 3,805.62 mi (6,124.56 km) |
| Allentown to Cassa de la Selva | 3,919.45 mi (6,307.75 km) |
| Allentown to Castalla | 3,858.24 mi (6,209.24 km) |
| Allentown to Castellbisbal | 3,891.47 mi (6,262.72 km) |
| Allentown to Castelldefels | 3,897.41 mi (6,272.28 km) |
| Allentown to Castello de Ampurias | 3,916.98 mi (6,303.77 km) |
| Allentown to Castellon de la Plana | 3,844.46 mi (6,187.05 km) |
| Allentown to Castilleja de la Cuesta | 3,635.62 mi (5,850.97 km) |
| Allentown to Catarroja | 3,845.22 mi (6,188.29 km) |
| Allentown to Catral | 3,865.90 mi (6,221.56 km) |
| Allentown to Caudete | 3,839.62 mi (6,179.27 km) |
