| Healdsburg to Castle Pines (Colorado) | 965.78 mi (1,554.28 km) |
| Healdsburg to Castle Rock (Colorado) | 966.95 mi (1,556.16 km) |
| Healdsburg to Castro Valley (California) | 76.71 mi (123.46 km) |
| Healdsburg to Catalina Foothills (Arizona) | 802.15 mi (1,290.93 km) |
| Healdsburg to Cataño (Puerto Rico) | 3,650.59 mi (5,875.05 km) |
| Healdsburg to Cathedral City (California) | 486.20 mi (782.46 km) |
| Healdsburg to Catonsville (Maryland) | 2,451.51 mi (3,945.32 km) |
| Healdsburg to Cave Spring (Virginia) | 2,316.47 mi (3,728.00 km) |
| Healdsburg to Cayce (South Carolina) | 2,331.39 mi (3,752.00 km) |
| Healdsburg to Cayey (Puerto Rico) | 3,662.37 mi (5,894.01 km) |
| Healdsburg to Cedar City (Utah) | 534.49 mi (860.18 km) |
| Healdsburg to Cedar Falls (Iowa) | 1,609.74 mi (2,590.63 km) |
| Healdsburg to Cedar Hill (Texas) | 1,508.30 mi (2,427.37 km) |
| Healdsburg to Cedar Lake (Indiana) | 1,871.66 mi (3,012.14 km) |
| Healdsburg to Cedar Mill (Oregon) | 477.66 mi (768.72 km) |
