| Allentown to Cividale del Friuli | 4,241.37 mi (6,825.82 km) |
| Allentown to Civita Castellana | 4,332.22 mi (6,972.04 km) |
| Allentown to Civitanova Marche | 4,353.25 mi (7,005.88 km) |
| Allentown to Civitavecchia | 4,312.56 mi (6,940.40 km) |
| Allentown to Civitella in Val di Chiana | 4,262.29 mi (6,859.50 km) |
| Allentown to Clusone | 4,102.84 mi (6,602.88 km) |
| Allentown to Coccaglio | 4,114.59 mi (6,621.79 km) |
| Allentown to Codigoro | 4,230.06 mi (6,807.62 km) |
| Allentown to Codogno | 4,116.30 mi (6,624.54 km) |
| Allentown to Codroipo | 4,227.27 mi (6,803.14 km) |
| Allentown to Cogoleto | 4,096.18 mi (6,592.16 km) |
| Allentown to Colle di Val d'Elsa | 4,237.61 mi (6,819.78 km) |
| Allentown to Colle Salvetti | 4,202.50 mi (6,763.26 km) |
| Allentown to Collecchio | 4,151.89 mi (6,681.82 km) |
| Allentown to Colleferro | 4,379.13 mi (7,047.53 km) |
