| San Marino to Cadillac (Michigan) | 1,870.31 mi (3,009.98 km) |
| San Marino to Caguas (Puerto Rico) | 3,371.26 mi (5,425.52 km) |
| San Marino to Cahokia (Illinois) | 1,578.23 mi (2,539.92 km) |
| San Marino to Calabasas (California) | 31.80 mi (51.18 km) |
| San Marino to Caldwell (Idaho) | 662.57 mi (1,066.30 km) |
| San Marino to Caledonia (Wisconsin) | 1,731.00 mi (2,785.77 km) |
| San Marino to Calera (Alabama) | 1,798.94 mi (2,895.11 km) |
| San Marino to Calexico (California) | 180.77 mi (290.92 km) |
| San Marino to Calhoun (Georgia) | 1,884.96 mi (3,033.55 km) |
| San Marino to California (Maryland) | 2,318.44 mi (3,731.16 km) |
| San Marino to California City (California) | 72.84 mi (117.22 km) |
| San Marino to Callaway (Florida) | 1,916.59 mi (3,084.46 km) |
| San Marino to Calumet City (Illinois) | 1,735.08 mi (2,792.33 km) |
| San Marino to Calverton (Maryland) | 2,289.29 mi (3,684.26 km) |
| San Marino to Camano (Washington) | 997.39 mi (1,605.15 km) |
