| Middle Island to Silver Firs (Washington) | 2,434.62 mi (3,918.14 km) |
| Middle Island to Silver Spring (Maryland) | 252.00 mi (405.56 km) |
| Middle Island to Silver Springs Shores (Florida) | 960.58 mi (1,545.90 km) |
| Middle Island to Silverdale (Washington) | 2,460.95 mi (3,960.52 km) |
| Middle Island to Silverton (Oregon) | 2,496.59 mi (4,017.88 km) |
| Middle Island to Simi Valley (California) | 2,520.31 mi (4,056.05 km) |
| Middle Island to Simpsonville (South Carolina) | 662.14 mi (1,065.62 km) |
| Middle Island to Sioux City (Iowa) | 1,210.85 mi (1,948.68 km) |
| Middle Island to Sioux Falls (South Dakota) | 1,226.64 mi (1,974.09 km) |
| Middle Island to Skokie (Illinois) | 769.19 mi (1,237.89 km) |
| Middle Island to Sleepy Hollow (New York) | 50.42 mi (81.15 km) |
| Middle Island to Slidell (Louisiana) | 1,192.67 mi (1,919.42 km) |
| Middle Island to Smithfield (North Carolina) | 472.95 mi (761.14 km) |
| Middle Island to Smithfield (Utah) | 2,000.05 mi (3,218.77 km) |
| Middle Island to Smithville (Missouri) | 1,144.20 mi (1,841.41 km) |
