| San Marino to Portage (Indiana) | 1,753.85 mi (2,822.55 km) |
| San Marino to Portage (Michigan) | 1,840.08 mi (2,961.32 km) |
| San Marino to Portage (Wisconsin) | 1,663.08 mi (2,676.47 km) |
| San Marino to Portales (New Mexico) | 843.06 mi (1,356.78 km) |
| San Marino to Porterville (California) | 143.91 mi (231.60 km) |
| San Marino to Portland (Maine) | 2,617.54 mi (4,212.53 km) |
| San Marino to Portland (Oregon) | 824.23 mi (1,326.47 km) |
| San Marino to Portland (Tennessee) | 1,780.20 mi (2,864.96 km) |
| San Marino to Portland (Texas) | 1,301.05 mi (2,093.84 km) |
| San Marino to Portsmouth (New Hampshire) | 2,593.60 mi (4,173.99 km) |
| San Marino to Portsmouth (Ohio) | 1,968.56 mi (3,168.09 km) |
| San Marino to Portsmouth (Virginia) | 2,338.31 mi (3,763.15 km) |
| San Marino to Post Falls (Idaho) | 941.56 mi (1,515.30 km) |
| San Marino to Potomac (Maryland) | 2,276.39 mi (3,663.50 km) |
| San Marino to Potomac Park (California) | 98.45 mi (158.45 km) |
