| Allentown to Cortona | 4,278.99 mi (6,886.38 km) |
| Allentown to Cosenza | 4,613.20 mi (7,424.22 km) |
| Allentown to Cossato | 4,037.20 mi (6,497.24 km) |
| Allentown to Costa Volpino | 4,110.89 mi (6,615.83 km) |
| Allentown to Creazzo | 4,179.29 mi (6,725.92 km) |
| Allentown to Crema | 4,108.53 mi (6,612.04 km) |
| Allentown to Cremona | 4,131.21 mi (6,648.54 km) |
| Allentown to Crevalcore | 4,192.94 mi (6,747.88 km) |
| Allentown to Crispiano | 4,605.59 mi (7,411.98 km) |
| Allentown to Crosia | 4,625.54 mi (7,444.10 km) |
| Allentown to Crotone | 4,659.91 mi (7,499.41 km) |
| Allentown to Cuneo | 4,048.70 mi (6,515.76 km) |
| Allentown to Cuorgne | 4,020.66 mi (6,470.63 km) |
| Allentown to Cusano Milanino | 4,081.19 mi (6,568.04 km) |
| Allentown to Cutro | 4,655.99 mi (7,493.09 km) |
