| Rock Island to Sugar Hill (Georgia) | 620.65 mi (998.83 km) |
| Rock Island to Sugar Land (Texas) | 867.94 mi (1,396.82 km) |
| Rock Island to Sugarland Run (Virginia) | 715.74 mi (1,151.87 km) |
| Rock Island to Sugarmill Woods (Florida) | 990.60 mi (1,594.22 km) |
| Rock Island to Suisun City (California) | 1,672.28 mi (2,691.27 km) |
| Rock Island to Suitland (Maryland) | 742.82 mi (1,195.45 km) |
| Rock Island to Sulphur (Louisiana) | 791.96 mi (1,274.53 km) |
| Rock Island to Sulphur Springs (Texas) | 638.04 mi (1,026.83 km) |
| Rock Island to Summerfield (Maryland) | 744.42 mi (1,198.03 km) |
| Rock Island to Summerfield (North Carolina) | 679.89 mi (1,094.18 km) |
| Rock Island to Summerlin South (Nevada) | 1,377.65 mi (2,217.11 km) |
| Rock Island to Summerville (South Carolina) | 817.22 mi (1,315.19 km) |
| Rock Island to Summit (Illinois) | 144.63 mi (232.76 km) |
| Rock Island to Summit (New Jersey) | 844.87 mi (1,359.69 km) |
| Rock Island to Sumner (Washington) | 1,601.59 mi (2,577.51 km) |
