| Rock Island to Frederick (Colorado) | 757.58 mi (1,219.21 km) |
| Rock Island to Frederick (Maryland) | 705.77 mi (1,135.82 km) |
| Rock Island to Fredericksburg (Texas) | 901.63 mi (1,451.03 km) |
| Rock Island to Fredericksburg (Virginia) | 727.18 mi (1,170.29 km) |
| Rock Island to Frederickson (Washington) | 1,607.15 mi (2,586.45 km) |
| Rock Island to Freeport (Illinois) | 74.72 mi (120.24 km) |
| Rock Island to Freeport (New York) | 885.91 mi (1,425.73 km) |
| Rock Island to Freeport (Texas) | 906.01 mi (1,458.09 km) |
| Rock Island to Fremont (California) | 1,686.71 mi (2,714.51 km) |
| Rock Island to Fremont (Nebraska) | 305.71 mi (492.00 km) |
| Rock Island to Fremont (Ohio) | 386.94 mi (622.72 km) |
| Rock Island to French Valley (California) | 1,544.10 mi (2,484.99 km) |
| Rock Island to Fresno (California) | 1,590.85 mi (2,560.23 km) |
| Rock Island to Fresno (Texas) | 868.78 mi (1,398.16 km) |
| Rock Island to Fridley (Minnesota) | 283.67 mi (456.52 km) |
