| Rock Island to Spout Springs (North Carolina) | 757.08 mi (1,218.40 km) |
| Rock Island to Spring (Texas) | 832.56 mi (1,339.87 km) |
| Rock Island to Spring Creek (Nevada) | 1,298.74 mi (2,090.12 km) |
| Rock Island to Spring Hill (Florida) | 1,005.53 mi (1,618.25 km) |
| Rock Island to Spring Hill (Tennessee) | 442.40 mi (711.98 km) |
| Rock Island to Spring Lake (North Carolina) | 762.47 mi (1,227.08 km) |
| Rock Island to Spring Valley (California) | 1,566.89 mi (2,521.66 km) |
| Rock Island to Spring Valley (Nevada) | 1,374.91 mi (2,212.70 km) |
| Rock Island to Spring Valley (New York) | 857.38 mi (1,379.82 km) |
| Rock Island to Springboro (Ohio) | 358.45 mi (576.86 km) |
| Rock Island to Springdale (Arkansas) | 412.33 mi (663.58 km) |
| Rock Island to Springdale (New Jersey) | 824.24 mi (1,326.49 km) |
| Rock Island to Springdale (Ohio) | 354.81 mi (571.01 km) |
| Rock Island to Springfield (Illinois) | 127.09 mi (204.53 km) |
| Rock Island to Springfield (Massachusetts) | 928.80 mi (1,494.77 km) |
