| Healdsburg to Castrovillari | 6,430.92 mi (10,349.57 km) |
| Healdsburg to Catania | 6,536.71 mi (10,519.81 km) |
| Healdsburg to Catanzaro | 6,496.29 mi (10,454.76 km) |
| Healdsburg to Cattolica | 6,093.34 mi (9,806.29 km) |
| Healdsburg to Cava de' Tirreni | 6,337.66 mi (10,199.49 km) |
| Healdsburg to Cavallino | 6,454.17 mi (10,386.98 km) |
| Healdsburg to Cavarzere | 6,008.17 mi (9,669.22 km) |
| Healdsburg to Cave | 6,223.34 mi (10,015.51 km) |
| Healdsburg to Cavriago | 5,990.65 mi (9,641.02 km) |
| Healdsburg to Cavriglia | 6,084.74 mi (9,792.45 km) |
| Healdsburg to Cazzago San Martino | 5,926.52 mi (9,537.81 km) |
| Healdsburg to Ceccano | 6,249.05 mi (10,056.88 km) |
| Healdsburg to Cecina | 6,068.81 mi (9,766.81 km) |
| Healdsburg to Cefalu | 6,474.38 mi (10,419.51 km) |
| Healdsburg to Ceglie Messapico | 6,415.94 mi (10,325.46 km) |
