| Conwy to Silver Firs (Washington) | 4,571.55 mi (7,357.20 km) |
| Conwy to Silver Spring (Maryland) | 3,475.02 mi (5,592.50 km) |
| Conwy to Silver Springs Shores (Florida) | 4,159.56 mi (6,694.17 km) |
| Conwy to Silverdale (Washington) | 4,596.90 mi (7,398.00 km) |
| Conwy to Silverton (Oregon) | 4,751.25 mi (7,646.40 km) |
| Conwy to Simi Valley (California) | 5,246.20 mi (8,442.94 km) |
| Conwy to Simpsonville (South Carolina) | 3,888.13 mi (6,257.34 km) |
| Conwy to Sioux City (Iowa) | 4,045.22 mi (6,510.14 km) |
| Conwy to Sioux Falls (South Dakota) | 4,005.97 mi (6,446.99 km) |
| Conwy to Skokie (Illinois) | 3,750.31 mi (6,035.54 km) |
| Conwy to Sleepy Hollow (New York) | 3,254.59 mi (5,237.76 km) |
| Conwy to Slidell (Louisiana) | 4,411.64 mi (7,099.85 km) |
| Conwy to Smithfield (North Carolina) | 3,693.03 mi (5,943.36 km) |
| Conwy to Smithfield (Utah) | 4,602.26 mi (7,406.62 km) |
| Conwy to Smithville (Missouri) | 4,133.31 mi (6,651.92 km) |
