| Rock Island to San Luis Obispo (California) | 1,675.91 mi (2,697.12 km) |
| Rock Island to San Marcos (California) | 1,563.00 mi (2,515.41 km) |
| Rock Island to San Marcos (Texas) | 900.42 mi (1,449.09 km) |
| Rock Island to San Marino (California) | 1,578.54 mi (2,540.41 km) |
| Rock Island to San Mateo (California) | 1,703.10 mi (2,740.87 km) |
| Rock Island to San Pablo (California) | 1,695.58 mi (2,728.78 km) |
| Rock Island to San Rafael (California) | 1,704.27 mi (2,742.76 km) |
| Rock Island to San Ramon (California) | 1,678.96 mi (2,702.02 km) |
| Rock Island to San Tan Valley (Arizona) | 1,282.62 mi (2,064.18 km) |
| Rock Island to Sand Springs (Oklahoma) | 474.13 mi (763.04 km) |
| Rock Island to Sandusky (Ohio) | 407.91 mi (656.47 km) |
| Rock Island to Sandy (Oregon) | 1,602.13 mi (2,578.37 km) |
| Rock Island to Sandy (Utah) | 1,107.62 mi (1,782.55 km) |
| Rock Island to Sandy Springs (Georgia) | 621.08 mi (999.54 km) |
| Rock Island to Sanford (Florida) | 1,020.41 mi (1,642.19 km) |
