| Northport to Silver Firs (Washington) | 2,051.19 mi (3,301.08 km) |
| Northport to Silver Spring (Maryland) | 710.57 mi (1,143.56 km) |
| Northport to Silver Springs Shores (Florida) | 436.92 mi (703.15 km) |
| Northport to Silverdale (Washington) | 2,071.13 mi (3,333.16 km) |
| Northport to Silverton (Oregon) | 2,032.57 mi (3,271.11 km) |
| Northport to Simi Valley (California) | 1,783.62 mi (2,870.47 km) |
| Northport to Simpsonville (South Carolina) | 322.40 mi (518.86 km) |
| Northport to Sioux City (Iowa) | 797.26 mi (1,283.06 km) |
| Northport to Sioux Falls (South Dakota) | 864.29 mi (1,390.95 km) |
| Northport to Skokie (Illinois) | 606.51 mi (976.08 km) |
| Northport to Sleepy Hollow (New York) | 927.75 mi (1,493.07 km) |
| Northport to Slidell (Louisiana) | 241.97 mi (389.41 km) |
| Northport to Smithfield (North Carolina) | 549.69 mi (884.64 km) |
| Northport to Smithfield (Utah) | 1,446.93 mi (2,328.60 km) |
| Northport to Smithville (Missouri) | 574.38 mi (924.37 km) |
