| San Marino to Rome (New York) | 2,356.12 mi (3,791.80 km) |
| San Marino to Romeoville (Illinois) | 1,707.12 mi (2,747.35 km) |
| San Marino to Romulus (Michigan) | 1,953.48 mi (3,143.82 km) |
| San Marino to Ronkonkoma (New York) | 2,482.36 mi (3,994.97 km) |
| San Marino to Roosevelt (New York) | 2,458.99 mi (3,957.36 km) |
| San Marino to Rosamond (California) | 51.69 mi (83.19 km) |
| San Marino to Rosaryville (Maryland) | 2,297.50 mi (3,697.47 km) |
| San Marino to Roscoe (Illinois) | 1,669.76 mi (2,687.21 km) |
| San Marino to Rose Hill (Virginia) | 2,282.26 mi (3,672.94 km) |
| San Marino to Roseburg (Oregon) | 689.01 mi (1,108.85 km) |
| San Marino to Rosedale (California) | 107.24 mi (172.58 km) |
| San Marino to Rosedale (Maryland) | 2,311.37 mi (3,719.80 km) |
| San Marino to Roselle (Illinois) | 1,711.26 mi (2,754.00 km) |
| San Marino to Roselle (New Jersey) | 2,423.75 mi (3,900.66 km) |
| San Marino to Roselle Park (New Jersey) | 2,423.35 mi (3,900.00 km) |
