| Ottaviano to Cortona | 210.67 mi (339.05 km) |
| Ottaviano to Cosenza | 142.30 mi (229.01 km) |
| Ottaviano to Cossato | 454.92 mi (732.13 km) |
| Ottaviano to Costa Volpino | 408.30 mi (657.09 km) |
| Ottaviano to Creazzo | 356.94 mi (574.44 km) |
| Ottaviano to Crema | 394.65 mi (635.12 km) |
| Ottaviano to Cremona | 371.40 mi (597.70 km) |
| Ottaviano to Crevalcore | 315.92 mi (508.42 km) |
| Ottaviano to Crispiano | 145.32 mi (233.88 km) |
| Ottaviano to Crosia | 149.83 mi (241.13 km) |
| Ottaviano to Crotone | 185.54 mi (298.60 km) |
| Ottaviano to Cuneo | 428.32 mi (689.32 km) |
| Ottaviano to Cuorgne | 465.47 mi (749.11 km) |
| Ottaviano to Cusano Milanino | 419.99 mi (675.90 km) |
| Ottaviano to Cutro | 182.67 mi (293.98 km) |
