| South San Francisco to Castle Pines (Colorado) | 954.81 mi (1,536.62 km) |
| South San Francisco to Castle Rock (Colorado) | 955.54 mi (1,537.79 km) |
| South San Francisco to Castro Valley (California) | 19.89 mi (32.01 km) |
| South San Francisco to Catalina Foothills (Arizona) | 749.57 mi (1,206.32 km) |
| South San Francisco to Cataño (Puerto Rico) | 3,620.20 mi (5,826.15 km) |
| South San Francisco to Cathedral City (California) | 425.40 mi (684.62 km) |
| South San Francisco to Catonsville (Maryland) | 2,447.35 mi (3,938.62 km) |
| South San Francisco to Cave Spring (Virginia) | 2,306.63 mi (3,712.16 km) |
| South San Francisco to Cayce (South Carolina) | 2,314.09 mi (3,724.16 km) |
| South San Francisco to Cayey (Puerto Rico) | 3,631.59 mi (5,844.48 km) |
| South San Francisco to Cedar City (Utah) | 509.74 mi (820.34 km) |
| South San Francisco to Cedar Falls (Iowa) | 1,610.43 mi (2,591.74 km) |
| South San Francisco to Cedar Hill (Texas) | 1,476.02 mi (2,375.42 km) |
| South San Francisco to Cedar Lake (Indiana) | 1,869.40 mi (3,008.51 km) |
| South San Francisco to Cedar Mill (Oregon) | 544.93 mi (876.97 km) |
