| Healdsburg to Cibolo (Texas) | 1,536.89 mi (2,473.39 km) |
| Healdsburg to Cicero (Illinois) | 1,852.06 mi (2,980.60 km) |
| Healdsburg to Cimarron Hills (Colorado) | 977.49 mi (1,573.12 km) |
| Healdsburg to Cincinnati (Ohio) | 2,047.87 mi (3,295.74 km) |
| Healdsburg to Cinco Ranch (Texas) | 1,658.63 mi (2,669.30 km) |
| Healdsburg to Circleville (Ohio) | 2,123.98 mi (3,418.22 km) |
| Healdsburg to Citrus (California) | 416.49 mi (670.28 km) |
| Healdsburg to Citrus Heights (California) | 85.24 mi (137.17 km) |
| Healdsburg to Citrus Park (Florida) | 2,416.05 mi (3,888.26 km) |
| Healdsburg to Claiborne (Louisiana) | 1,764.93 mi (2,840.39 km) |
| Healdsburg to Claremont (California) | 422.45 mi (679.87 km) |
| Healdsburg to Claremont (New Hampshire) | 2,614.76 mi (4,208.05 km) |
| Healdsburg to Claremore (Oklahoma) | 1,497.60 mi (2,410.16 km) |
| Healdsburg to Clarksburg (Maryland) | 2,424.99 mi (3,902.64 km) |
| Healdsburg to Clarksburg (West Virginia) | 2,264.81 mi (3,644.86 km) |
