| Rockford to Sumter (South Carolina) | 742.63 mi (1,195.14 km) |
| Rockford to Sun City (Arizona) | 1,392.98 mi (2,241.79 km) |
| Rockford to Sun City Center (Florida) | 1,073.34 mi (1,727.38 km) |
| Rockford to Sun City West (Arizona) | 1,394.72 mi (2,244.58 km) |
| Rockford to Sun Lakes (Arizona) | 1,387.91 mi (2,233.63 km) |
| Rockford to Sun Prairie (Wisconsin) | 64.36 mi (103.58 km) |
| Rockford to Sun Valley (Nevada) | 1,604.76 mi (2,582.61 km) |
| Rockford to Sun Village (California) | 1,642.84 mi (2,643.90 km) |
| Rockford to Sunland Park (New Mexico) | 1,202.29 mi (1,934.89 km) |
| Rockford to Sunny Isles Beach (Florida) | 1,236.47 mi (1,989.91 km) |
| Rockford to Sunnyside (Washington) | 1,545.58 mi (2,487.36 km) |
| Rockford to Sunnyvale (California) | 1,769.80 mi (2,848.23 km) |
| Rockford to Sunrise (Florida) | 1,218.56 mi (1,961.08 km) |
| Rockford to Sunrise Manor (Nevada) | 1,446.52 mi (2,327.95 km) |
| Rockford to Sunset (Florida) | 1,246.18 mi (2,005.53 km) |
