| San Marino to Wichita (Kansas) | 1,185.53 mi (1,907.92 km) |
| San Marino to Wichita Falls (Texas) | 1,119.98 mi (1,802.43 km) |
| San Marino to Wickliffe (Ohio) | 2,048.00 mi (3,295.93 km) |
| San Marino to Wildomar (California) | 60.20 mi (96.88 km) |
| San Marino to Wildwood (Florida) | 2,148.70 mi (3,458.00 km) |
| San Marino to Wildwood (Missouri) | 1,551.81 mi (2,497.40 km) |
| San Marino to Wilkes-Barre (Pennsylvania) | 2,337.55 mi (3,761.92 km) |
| San Marino to Wilkinsburg (Pennsylvania) | 2,129.82 mi (3,427.62 km) |
| San Marino to Williamsburg (Virginia) | 2,315.07 mi (3,725.74 km) |
| San Marino to Williamsport (Pennsylvania) | 2,277.27 mi (3,664.91 km) |
| San Marino to Williamstown (New Jersey) | 2,390.73 mi (3,847.51 km) |
| San Marino to Willimantic (Connecticut) | 2,525.55 mi (4,064.49 km) |
| San Marino to Williston (North Dakota) | 1,224.79 mi (1,971.11 km) |
| San Marino to Willmar (Minnesota) | 1,435.53 mi (2,310.26 km) |
| San Marino to Willoughby (Ohio) | 2,051.24 mi (3,301.16 km) |
