| Ukiah to Cortona | 6,091.21 mi (9,802.86 km) |
| Ukiah to Cosenza | 6,441.10 mi (10,365.95 km) |
| Ukiah to Cossato | 5,854.05 mi (9,421.19 km) |
| Ukiah to Costa Volpino | 5,892.80 mi (9,483.54 km) |
| Ukiah to Creazzo | 5,947.20 mi (9,571.10 km) |
| Ukiah to Crema | 5,907.76 mi (9,507.61 km) |
| Ukiah to Cremona | 5,930.70 mi (9,544.54 km) |
| Ukiah to Crevalcore | 5,985.17 mi (9,632.20 km) |
| Ukiah to Crispiano | 6,389.31 mi (10,282.61 km) |
| Ukiah to Crosia | 6,439.01 mi (10,362.59 km) |
| Ukiah to Crotone | 6,477.29 mi (10,424.19 km) |
| Ukiah to Cuneo | 5,902.57 mi (9,499.27 km) |
| Ukiah to Cuorgne | 5,849.26 mi (9,413.48 km) |
| Ukiah to Cusano Milanino | 5,883.50 mi (9,468.58 km) |
| Ukiah to Cutro | 6,476.74 mi (10,423.31 km) |
