| Rockford to Kennewick (Washington) | 1,505.90 mi (2,423.51 km) |
| Rockford to Kenosha (Wisconsin) | 64.60 mi (103.97 km) |
| Rockford to Kent (Ohio) | 404.54 mi (651.05 km) |
| Rockford to Kent (Washington) | 1,649.43 mi (2,654.49 km) |
| Rockford to Kentwood (Michigan) | 181.83 mi (292.62 km) |
| Rockford to Kerman (California) | 1,686.52 mi (2,714.19 km) |
| Rockford to Kernersville (North Carolina) | 641.23 mi (1,031.96 km) |
| Rockford to Kerrville (Texas) | 1,012.41 mi (1,629.31 km) |
| Rockford to Kettering (Maryland) | 684.24 mi (1,101.18 km) |
| Rockford to Kettering (Ohio) | 311.53 mi (501.36 km) |
| Rockford to Kewanee (Illinois) | 83.31 mi (134.07 km) |
| Rockford to Key Biscayne (Florida) | 1,251.42 mi (2,013.97 km) |
| Rockford to Key Largo (Florida) | 1,282.55 mi (2,064.07 km) |
| Rockford to Key West (Florida) | 1,291.55 mi (2,078.56 km) |
| Rockford to Keystone (Florida) | 1,041.34 mi (1,675.88 km) |
