| San Marino to Commerce (California) | 8.99 mi (14.47 km) |
| San Marino to Commerce City (Colorado) | 831.62 mi (1,338.36 km) |
| San Marino to Compton (California) | 17.15 mi (27.59 km) |
| San Marino to Comstock Park (Michigan) | 1,843.50 mi (2,966.82 km) |
| San Marino to Concord (California) | 343.35 mi (552.56 km) |
| San Marino to Concord (Missouri) | 1,568.45 mi (2,524.18 km) |
| San Marino to Concord (New Hampshire) | 2,554.01 mi (4,110.28 km) |
| San Marino to Concord (North Carolina) | 2,116.39 mi (3,405.99 km) |
| San Marino to Conneaut (Ohio) | 2,095.31 mi (3,372.08 km) |
| San Marino to Connersville (Indiana) | 1,850.83 mi (2,978.62 km) |
| San Marino to Conroe (Texas) | 1,345.64 mi (2,165.60 km) |
| San Marino to Converse (Texas) | 1,203.46 mi (1,936.77 km) |
| San Marino to Conway (Arkansas) | 1,455.95 mi (2,343.12 km) |
| San Marino to Conway (Florida) | 2,193.75 mi (3,530.50 km) |
| San Marino to Conway (South Carolina) | 2,224.58 mi (3,580.11 km) |
