| South San Francisco to Cadillac (Michigan) | 1,966.26 mi (3,164.39 km) |
| South San Francisco to Caguas (Puerto Rico) | 3,633.84 mi (5,848.11 km) |
| South San Francisco to Cahokia (Illinois) | 1,744.86 mi (2,808.07 km) |
| South San Francisco to Calabasas (California) | 321.02 mi (516.64 km) |
| South San Francisco to Caldwell (Idaho) | 512.11 mi (824.16 km) |
| South San Francisco to Caledonia (Wisconsin) | 1,843.19 mi (2,966.32 km) |
| South San Francisco to Calera (Alabama) | 2,021.33 mi (3,253.02 km) |
| South San Francisco to Calexico (California) | 520.15 mi (837.10 km) |
| South San Francisco to Calhoun (Georgia) | 2,090.65 mi (3,364.57 km) |
| South San Francisco to California (Maryland) | 2,475.32 mi (3,983.64 km) |
| South San Francisco to California City (California) | 306.03 mi (492.50 km) |
| South San Francisco to Callaway (Florida) | 2,162.23 mi (3,479.77 km) |
| South San Francisco to Calumet City (Illinois) | 1,862.61 mi (2,997.58 km) |
| South San Francisco to Calverton (Maryland) | 2,439.60 mi (3,926.15 km) |
| South San Francisco to Camano (Washington) | 727.74 mi (1,171.19 km) |
