| Formia to Castelletto sopra Ticino | 395.98 mi (637.26 km) |
| Formia to Castelli Calepio | 354.56 mi (570.61 km) |
| Formia to Castelnovo ne' Monti | 272.75 mi (438.95 km) |
| Formia to Castelnuovo Berardenga | 179.76 mi (289.29 km) |
| Formia to Castelnuovo di Porto | 83.09 mi (133.72 km) |
| Formia to Castelnuovo di Verona | 321.47 mi (517.36 km) |
| Formia to Castelnuovo Rangone | 264.36 mi (425.44 km) |
| Formia to Castelvetrano | 251.45 mi (404.67 km) |
| Formia to Castelvetro di Modena | 260.99 mi (420.02 km) |
| Formia to Castenaso | 249.00 mi (400.72 km) |
| Formia to Castenedolo | 334.84 mi (538.87 km) |
| Formia to Castiglion Fiorentino | 167.70 mi (269.88 km) |
| Formia to Castiglione del Lago | 152.23 mi (244.99 km) |
| Formia to Castiglione delle Stiviere | 325.65 mi (524.09 km) |
| Formia to Castrolibero | 191.52 mi (308.23 km) |
