| San Marino to Castle Pines (Colorado) | 819.22 mi (1,318.40 km) |
| San Marino to Castle Rock (Colorado) | 817.79 mi (1,316.10 km) |
| San Marino to Castro Valley (California) | 331.96 mi (534.23 km) |
| San Marino to Catalina Foothills (Arizona) | 436.25 mi (702.08 km) |
| San Marino to Cataño (Puerto Rico) | 3,358.23 mi (5,404.54 km) |
| San Marino to Cathedral City (California) | 96.53 mi (155.34 km) |
| San Marino to Catonsville (Maryland) | 2,299.22 mi (3,700.24 km) |
| San Marino to Cave Spring (Virginia) | 2,135.15 mi (3,436.19 km) |
| San Marino to Cayce (South Carolina) | 2,110.68 mi (3,396.82 km) |
| San Marino to Cayey (Puerto Rico) | 3,368.20 mi (5,420.60 km) |
| San Marino to Cedar City (Utah) | 373.25 mi (600.68 km) |
| San Marino to Cedar Falls (Iowa) | 1,499.59 mi (2,413.36 km) |
| San Marino to Cedar Hill (Texas) | 1,223.34 mi (1,968.78 km) |
| San Marino to Cedar Lake (Indiana) | 1,738.75 mi (2,798.25 km) |
| San Marino to Cedar Mill (Oregon) | 826.47 mi (1,330.08 km) |
