| Allentown to Cadiz | 3,649.84 mi (5,873.85 km) |
| Allentown to Calafell | 3,881.07 mi (6,245.98 km) |
| Allentown to Calahorra | 3,683.94 mi (5,928.74 km) |
| Allentown to Calasparra | 3,820.58 mi (6,148.63 km) |
| Allentown to Calatayud | 3,727.40 mi (5,998.68 km) |
| Allentown to Caldas de Montbuy | 3,895.11 mi (6,268.57 km) |
| Allentown to Caldas de Reyes | 3,363.15 mi (5,412.46 km) |
| Allentown to Calella | 3,918.43 mi (6,306.11 km) |
| Allentown to Callosa de Segura | 3,863.50 mi (6,217.71 km) |
| Allentown to Calpe | 3,890.83 mi (6,261.68 km) |
| Allentown to Calvia | 3,977.20 mi (6,400.69 km) |
| Allentown to Camas | 3,635.87 mi (5,851.37 km) |
| Allentown to Cambados | 3,358.12 mi (5,404.37 km) |
| Allentown to Cambre | 3,360.36 mi (5,407.98 km) |
| Allentown to Cambrils | 3,861.46 mi (6,214.42 km) |
