| Didcot to Silver Firs (Washington) | 4,730.08 mi (7,612.33 km) |
| Didcot to Silver Spring (Maryland) | 3,612.08 mi (5,813.09 km) |
| Didcot to Silver Springs Shores (Florida) | 4,288.96 mi (6,902.42 km) |
| Didcot to Silverdale (Washington) | 4,755.39 mi (7,653.07 km) |
| Didcot to Silverton (Oregon) | 4,910.01 mi (7,901.89 km) |
| Didcot to Simi Valley (California) | 5,404.20 mi (8,697.22 km) |
| Didcot to Simpsonville (South Carolina) | 4,024.71 mi (6,477.14 km) |
| Didcot to Sioux City (Iowa) | 4,198.60 mi (6,757.00 km) |
| Didcot to Sioux Falls (South Dakota) | 4,160.10 mi (6,695.04 km) |
| Didcot to Skokie (Illinois) | 3,898.86 mi (6,274.61 km) |
| Didcot to Sleepy Hollow (New York) | 3,391.74 mi (5,458.48 km) |
| Didcot to Slidell (Louisiana) | 4,550.60 mi (7,323.48 km) |
| Didcot to Smithfield (North Carolina) | 3,826.70 mi (6,158.47 km) |
| Didcot to Smithfield (Utah) | 4,760.28 mi (7,660.93 km) |
| Didcot to Smithville (Missouri) | 4,283.75 mi (6,894.03 km) |
