| San Marino to Willow Grove (Pennsylvania) | 2,381.03 mi (3,831.90 km) |
| San Marino to Willowbrook (California) | 15.59 mi (25.09 km) |
| San Marino to Willowick (Ohio) | 2,048.14 mi (3,296.17 km) |
| San Marino to Wilmette (Illinois) | 1,730.41 mi (2,784.82 km) |
| San Marino to Wilmington (Delaware) | 2,360.61 mi (3,799.03 km) |
| San Marino to Wilmington (North Carolina) | 2,284.33 mi (3,676.27 km) |
| San Marino to Wilmington (Ohio) | 1,921.30 mi (3,092.04 km) |
| San Marino to Wilmington Island (Georgia) | 2,143.68 mi (3,449.92 km) |
| San Marino to Wilson (North Carolina) | 2,263.17 mi (3,642.23 km) |
| San Marino to Wilsonville (Oregon) | 811.33 mi (1,305.71 km) |
| San Marino to Wilton Manors (Florida) | 2,320.62 mi (3,734.67 km) |
| San Marino to Wimauma (Florida) | 2,157.30 mi (3,471.85 km) |
| San Marino to Winchester (Kentucky) | 1,902.92 mi (3,062.45 km) |
| San Marino to Winchester (Nevada) | 218.27 mi (351.27 km) |
| San Marino to Winchester (Virginia) | 2,223.18 mi (3,577.86 km) |
