| Rockford to Kingsville (Texas) | 1,133.00 mi (1,823.39 km) |
| Rockford to Kinston (North Carolina) | 782.84 mi (1,259.86 km) |
| Rockford to Kirkland (Washington) | 1,649.26 mi (2,654.23 km) |
| Rockford to Kirksville (Missouri) | 231.41 mi (372.42 km) |
| Rockford to Kirkwood (Missouri) | 264.13 mi (425.07 km) |
| Rockford to Kiryas Joel (New York) | 768.95 mi (1,237.50 km) |
| Rockford to Kissimmee (Florida) | 1,055.16 mi (1,698.12 km) |
| Rockford to Klamath Falls (Oregon) | 1,662.84 mi (2,676.08 km) |
| Rockford to Knightdale (North Carolina) | 721.18 mi (1,160.63 km) |
| Rockford to Knik-Fairview (Alaska) | 2,772.82 mi (4,462.43 km) |
| Rockford to Knoxville (Tennessee) | 513.64 mi (826.62 km) |
| Rockford to Kokomo (Indiana) | 196.39 mi (316.06 km) |
| Rockford to Kuna (Idaho) | 1,380.20 mi (2,221.23 km) |
| Rockford to Kyle (Texas) | 978.81 mi (1,575.25 km) |
| Rockford to La Cañada Flintridge (California) | 1,666.45 mi (2,681.89 km) |
