| San Marino to Cloverleaf (Texas) | 1,374.63 mi (2,212.26 km) |
| San Marino to Cloverly (Maryland) | 2,286.32 mi (3,679.48 km) |
| San Marino to Clovis (California) | 206.73 mi (332.71 km) |
| San Marino to Clovis (New Mexico) | 851.36 mi (1,370.14 km) |
| San Marino to Clute (Texas) | 1,379.49 mi (2,220.08 km) |
| San Marino to Coachella (California) | 116.85 mi (188.05 km) |
| San Marino to Coalinga (California) | 187.29 mi (301.41 km) |
| San Marino to Coamo (Puerto Rico) | 3,358.10 mi (5,404.34 km) |
| San Marino to Coatesville (Pennsylvania) | 2,344.71 mi (3,773.44 km) |
| San Marino to Cockeysville (Maryland) | 2,304.16 mi (3,708.18 km) |
| San Marino to Cocoa (Florida) | 2,228.69 mi (3,586.73 km) |
| San Marino to Cocoa Beach (Florida) | 2,237.86 mi (3,601.49 km) |
| San Marino to Coconut Creek (Florida) | 2,314.81 mi (3,725.33 km) |
| San Marino to Coeur d'Alene (Idaho) | 940.89 mi (1,514.21 km) |
| San Marino to Cohoes (New York) | 2,446.26 mi (3,936.88 km) |
