| Rockford to Security-Widefield (Colorado) | 855.80 mi (1,377.27 km) |
| Rockford to Sedalia (Missouri) | 329.02 mi (529.51 km) |
| Rockford to Sedro-Woolley (Washington) | 1,652.17 mi (2,658.91 km) |
| Rockford to Seguin (Texas) | 1,005.88 mi (1,618.81 km) |
| Rockford to Selden (New York) | 832.31 mi (1,339.48 km) |
| Rockford to Selma (Alabama) | 689.11 mi (1,109.01 km) |
| Rockford to Selma (California) | 1,667.76 mi (2,683.99 km) |
| Rockford to Selma (Texas) | 1,015.63 mi (1,634.50 km) |
| Rockford to Seminole (Florida) | 1,056.70 mi (1,700.59 km) |
| Rockford to Seven Hills (Ohio) | 385.23 mi (619.97 km) |
| Rockford to Seven Oaks (South Carolina) | 711.42 mi (1,144.92 km) |
| Rockford to Severn (Maryland) | 682.16 mi (1,097.83 km) |
| Rockford to Severna Park (Maryland) | 689.73 mi (1,110.01 km) |
| Rockford to Sevierville (Tennessee) | 529.60 mi (852.31 km) |
| Rockford to Seymour (Indiana) | 282.92 mi (455.31 km) |
