| San Marino to Clarksdale (Mississippi) | 1,569.96 mi (2,526.60 km) |
| San Marino to Clarkston (Georgia) | 1,932.11 mi (3,109.43 km) |
| San Marino to Clarksville (Indiana) | 1,816.69 mi (2,923.68 km) |
| San Marino to Clarksville (Tennessee) | 1,735.05 mi (2,792.30 km) |
| San Marino to Clawson (Michigan) | 1,966.42 mi (3,164.64 km) |
| San Marino to Clay (Alabama) | 1,799.53 mi (2,896.07 km) |
| San Marino to Clayton (California) | 339.15 mi (545.81 km) |
| San Marino to Clayton (Missouri) | 1,570.35 mi (2,527.23 km) |
| San Marino to Clayton (North Carolina) | 2,235.07 mi (3,597.00 km) |
| San Marino to Clayton (Ohio) | 1,894.28 mi (3,048.55 km) |
| San Marino to Clearfield (Utah) | 585.91 mi (942.92 km) |
| San Marino to Clearlake (California) | 417.75 mi (672.30 km) |
| San Marino to Clearwater (Florida) | 2,124.18 mi (3,418.54 km) |
| San Marino to Cleburne (Texas) | 1,200.25 mi (1,931.62 km) |
| San Marino to Clemmons (North Carolina) | 2,124.03 mi (3,418.30 km) |
