| Rock Island to Security-Widefield (Colorado) | 769.08 mi (1,237.72 km) |
| Rock Island to Sedalia (Missouri) | 236.85 mi (381.18 km) |
| Rock Island to Sedro-Woolley (Washington) | 1,608.02 mi (2,587.85 km) |
| Rock Island to Seguin (Texas) | 919.04 mi (1,479.05 km) |
| Rock Island to Selden (New York) | 911.43 mi (1,466.80 km) |
| Rock Island to Selma (Alabama) | 655.34 mi (1,054.67 km) |
| Rock Island to Selma (California) | 1,586.80 mi (2,553.71 km) |
| Rock Island to Selma (Texas) | 928.05 mi (1,493.55 km) |
| Rock Island to Seminole (Florida) | 1,039.47 mi (1,672.87 km) |
| Rock Island to Seven Hills (Ohio) | 461.40 mi (742.55 km) |
| Rock Island to Seven Oaks (South Carolina) | 726.36 mi (1,168.96 km) |
| Rock Island to Severn (Maryland) | 748.43 mi (1,204.48 km) |
| Rock Island to Severna Park (Maryland) | 755.91 mi (1,216.53 km) |
| Rock Island to Sevierville (Tennessee) | 539.96 mi (868.97 km) |
| Rock Island to Seymour (Indiana) | 302.67 mi (487.11 km) |
