| Rockford to Sugar Hill (Georgia) | 625.16 mi (1,006.10 km) |
| Rockford to Sugar Land (Texas) | 948.47 mi (1,526.42 km) |
| Rockford to Sugarland Run (Virginia) | 651.41 mi (1,048.34 km) |
| Rockford to Sugarmill Woods (Florida) | 1,004.25 mi (1,616.19 km) |
| Rockford to Suisun City (California) | 1,748.07 mi (2,813.25 km) |
| Rockford to Suitland (Maryland) | 678.79 mi (1,092.41 km) |
| Rockford to Sulphur (Louisiana) | 864.67 mi (1,391.55 km) |
| Rockford to Sulphur Springs (Texas) | 724.01 mi (1,165.18 km) |
| Rockford to Summerfield (Maryland) | 679.93 mi (1,094.25 km) |
| Rockford to Summerfield (North Carolina) | 644.32 mi (1,036.93 km) |
| Rockford to Summerlin South (Nevada) | 1,462.45 mi (2,353.59 km) |
| Rockford to Summerville (South Carolina) | 802.43 mi (1,291.38 km) |
| Rockford to Summit (Illinois) | 71.94 mi (115.78 km) |
| Rockford to Summit (New Jersey) | 767.26 mi (1,234.79 km) |
| Rockford to Sumner (Washington) | 1,650.43 mi (2,656.11 km) |
