| Rockford to South Plainfield (New Jersey) | 766.90 mi (1,234.21 km) |
| Rockford to South Portland (Maine) | 952.21 mi (1,532.44 km) |
| Rockford to South Riding (Virginia) | 648.06 mi (1,042.95 km) |
| Rockford to South River (New Jersey) | 770.92 mi (1,240.68 km) |
| Rockford to South Salt Lake (Utah) | 1,183.26 mi (1,904.27 km) |
| Rockford to South San Francisco (California) | 1,783.24 mi (2,869.85 km) |
| Rockford to South San Jose Hills (California) | 1,658.04 mi (2,668.36 km) |
| Rockford to South Sioux City (Nebraska) | 375.31 mi (604.01 km) |
| Rockford to South St. Paul (Minnesota) | 269.39 mi (433.55 km) |
| Rockford to South Valley (New Mexico) | 1,071.82 mi (1,724.92 km) |
| Rockford to South Venice (Florida) | 1,116.18 mi (1,796.32 km) |
| Rockford to South Whittier (California) | 1,667.03 mi (2,682.82 km) |
| Rockford to South Yarmouth (Massachusetts) | 967.99 mi (1,557.83 km) |
| Rockford to Southaven (Mississippi) | 507.35 mi (816.50 km) |
| Rockford to Southchase (Florida) | 1,050.96 mi (1,691.35 km) |
