| Mason City to Castelfidardo | 4,937.77 mi (7,946.58 km) |
| Mason City to Castelfiorentino | 4,835.26 mi (7,781.61 km) |
| Mason City to Castelfranco di Sopra | 4,856.42 mi (7,815.65 km) |
| Mason City to Castelfranco di Sotto | 4,822.56 mi (7,761.16 km) |
| Mason City to Castelfranco Emilia | 4,793.27 mi (7,714.02 km) |
| Mason City to Castelfranco Veneto | 4,777.15 mi (7,688.07 km) |
| Mason City to Castellabate | 5,141.30 mi (8,274.12 km) |
| Mason City to Castellammare del Golfo | 5,168.51 mi (8,317.91 km) |
| Mason City to Castellammare di Stabia | 5,103.49 mi (8,213.28 km) |
| Mason City to Castellamonte | 4,633.27 mi (7,456.53 km) |
| Mason City to Castellana Grotte | 5,194.96 mi (8,360.48 km) |
| Mason City to Castellaneta | 5,198.51 mi (8,366.20 km) |
| Mason City to Castellanza | 4,667.60 mi (7,511.78 km) |
| Mason City to Castellarano | 4,784.59 mi (7,700.06 km) |
| Mason City to Castelleone | 4,713.86 mi (7,586.22 km) |
