| Mugnano di Napoli to Silver Firs (Washington) | 5,747.44 mi (9,249.62 km) |
| Mugnano di Napoli to Silver Spring (Maryland) | 4,591.32 mi (7,389.02 km) |
| Mugnano di Napoli to Silver Springs Shores (Florida) | 5,230.28 mi (8,417.33 km) |
| Mugnano di Napoli to Silverdale (Washington) | 5,772.00 mi (9,289.13 km) |
| Mugnano di Napoli to Silverton (Oregon) | 5,931.80 mi (9,546.30 km) |
| Mugnano di Napoli to Simi Valley (California) | 6,443.82 mi (10,370.33 km) |
| Mugnano di Napoli to Simpsonville (South Carolina) | 4,999.25 mi (8,045.52 km) |
| Mugnano di Napoli to Sioux City (Iowa) | 5,233.10 mi (8,421.86 km) |
| Mugnano di Napoli to Sioux Falls (South Dakota) | 5,196.38 mi (8,362.77 km) |
| Mugnano di Napoli to Skokie (Illinois) | 4,919.41 mi (7,917.02 km) |
| Mugnano di Napoli to Sleepy Hollow (New York) | 4,372.81 mi (7,037.35 km) |
| Mugnano di Napoli to Slidell (Louisiana) | 5,532.11 mi (8,903.06 km) |
| Mugnano di Napoli to Smithfield (North Carolina) | 4,790.44 mi (7,709.47 km) |
| Mugnano di Napoli to Smithfield (Utah) | 5,799.87 mi (9,333.99 km) |
| Mugnano di Napoli to Smithville (Missouri) | 5,309.75 mi (8,545.21 km) |
