| San Marino to Reading (Pennsylvania) | 2,337.61 mi (3,762.03 km) |
| San Marino to Red Bank (New Jersey) | 2,435.30 mi (3,919.23 km) |
| San Marino to Red Bank (Tennessee) | 1,858.82 mi (2,991.48 km) |
| San Marino to Red Bluff (California) | 475.76 mi (765.66 km) |
| San Marino to Red Hill (South Carolina) | 2,227.26 mi (3,584.42 km) |
| San Marino to Red Oak (Texas) | 1,233.99 mi (1,985.91 km) |
| San Marino to Red Wing (Minnesota) | 1,533.53 mi (2,467.98 km) |
| San Marino to Redan (Georgia) | 1,937.30 mi (3,117.78 km) |
| San Marino to Redding (California) | 502.81 mi (809.20 km) |
| San Marino to Redland (Maryland) | 2,278.32 mi (3,666.61 km) |
| San Marino to Redlands (California) | 54.13 mi (87.11 km) |
| San Marino to Redmond (Oregon) | 719.38 mi (1,157.73 km) |
| San Marino to Redmond (Washington) | 959.19 mi (1,543.67 km) |
| San Marino to Redondo Beach (California) | 23.71 mi (38.15 km) |
| San Marino to Redwood City (California) | 327.99 mi (527.85 km) |
