| Shannon to Silver Firs (Washington) | 4,461.60 mi (7,180.26 km) |
| Shannon to Silver Spring (Maryland) | 3,280.13 mi (5,278.86 km) |
| Shannon to Silver Springs Shores (Florida) | 3,957.64 mi (6,369.20 km) |
| Shannon to Silverdale (Washington) | 4,487.56 mi (7,222.03 km) |
| Shannon to Silverton (Oregon) | 4,636.72 mi (7,462.08 km) |
| Shannon to Simi Valley (California) | 5,104.34 mi (8,214.65 km) |
| Shannon to Simpsonville (South Carolina) | 3,692.70 mi (5,942.82 km) |
| Shannon to Sioux City (Iowa) | 3,880.71 mi (6,245.39 km) |
| Shannon to Sioux Falls (South Dakota) | 3,844.09 mi (6,186.47 km) |
| Shannon to Skokie (Illinois) | 3,573.09 mi (5,750.33 km) |
| Shannon to Sleepy Hollow (New York) | 3,059.81 mi (4,924.28 km) |
| Shannon to Slidell (Louisiana) | 4,218.89 mi (6,789.65 km) |
| Shannon to Smithfield (North Carolina) | 3,494.68 mi (5,624.14 km) |
| Shannon to Smithfield (Utah) | 4,461.15 mi (7,179.52 km) |
| Shannon to Smithville (Missouri) | 3,960.32 mi (6,373.52 km) |
