| Formia to Calafell | 625.50 mi (1,006.64 km) |
| Formia to Calahorra | 804.90 mi (1,295.36 km) |
| Formia to Calasparra | 839.03 mi (1,350.28 km) |
| Formia to Calatayud | 790.48 mi (1,272.16 km) |
| Formia to Caldas de Montbuy | 593.03 mi (954.40 km) |
| Formia to Caldas de Reyes | 1,144.29 mi (1,841.56 km) |
| Formia to Calella | 567.41 mi (913.16 km) |
| Formia to Callosa de Segura | 799.63 mi (1,286.88 km) |
| Formia to Calpe | 740.45 mi (1,191.63 km) |
| Formia to Calvia | 595.75 mi (958.77 km) |
| Formia to Camas | 1,080.93 mi (1,739.58 km) |
| Formia to Cambados | 1,152.90 mi (1,855.41 km) |
| Formia to Cambre | 1,127.47 mi (1,814.48 km) |
| Formia to Cambrils | 652.88 mi (1,050.70 km) |
| Formia to Campo de Criptana | 889.30 mi (1,431.18 km) |
