| Allentown to Castelfidardo | 4,339.31 mi (6,983.44 km) |
| Allentown to Castelfiorentino | 4,223.45 mi (6,796.99 km) |
| Allentown to Castelfranco di Sopra | 4,248.21 mi (6,836.83 km) |
| Allentown to Castelfranco di Sotto | 4,210.62 mi (6,776.33 km) |
| Allentown to Castelfranco Emilia | 4,192.88 mi (6,747.79 km) |
| Allentown to Castelfranco Veneto | 4,193.69 mi (6,749.10 km) |
| Allentown to Castellabate | 4,518.33 mi (7,271.55 km) |
| Allentown to Castellammare del Golfo | 4,511.13 mi (7,259.96 km) |
| Allentown to Castellammare di Stabia | 4,481.82 mi (7,212.80 km) |
| Allentown to Castellamonte | 4,023.59 mi (6,475.34 km) |
| Allentown to Castellana Grotte | 4,591.70 mi (7,389.62 km) |
| Allentown to Castellaneta | 4,591.29 mi (7,388.96 km) |
| Allentown to Castellanza | 4,066.94 mi (6,545.10 km) |
| Allentown to Castellarano | 4,182.37 mi (6,730.87 km) |
| Allentown to Castelleone | 4,114.19 mi (6,621.14 km) |
