| Piqua to Castelfidardo | 4,724.98 mi (7,604.11 km) |
| Piqua to Castelfiorentino | 4,613.48 mi (7,424.68 km) |
| Piqua to Castelfranco di Sopra | 4,637.04 mi (7,462.59 km) |
| Piqua to Castelfranco di Sotto | 4,600.64 mi (7,404.01 km) |
| Piqua to Castelfranco Emilia | 4,578.60 mi (7,368.55 km) |
| Piqua to Castelfranco Veneto | 4,573.15 mi (7,359.77 km) |
| Piqua to Castellabate | 4,913.58 mi (7,907.64 km) |
| Piqua to Castellammare del Golfo | 4,918.32 mi (7,915.27 km) |
| Piqua to Castellammare di Stabia | 4,876.47 mi (7,847.92 km) |
| Piqua to Castellamonte | 4,411.95 mi (7,100.35 km) |
| Piqua to Castellana Grotte | 4,980.18 mi (8,014.83 km) |
| Piqua to Castellaneta | 4,981.20 mi (8,016.47 km) |
| Piqua to Castellanza | 4,452.18 mi (7,165.09 km) |
| Piqua to Castellarano | 4,568.72 mi (7,352.64 km) |
| Piqua to Castelleone | 4,499.28 mi (7,240.90 km) |
