| Rockford to Kalispell (Montana) | 1,289.27 mi (2,074.88 km) |
| Rockford to Kaneohe (Hawaii) | 4,166.38 mi (6,705.14 km) |
| Rockford to Kankakee (Illinois) | 101.14 mi (162.77 km) |
| Rockford to Kannapolis (North Carolina) | 651.25 mi (1,048.09 km) |
| Rockford to Kansas City (Kansas) | 367.97 mi (592.20 km) |
| Rockford to Kansas City (Missouri) | 359.96 mi (579.31 km) |
| Rockford to Kapaa (Hawaii) | 4,217.39 mi (6,787.23 km) |
| Rockford to Kapolei (Hawaii) | 4,183.33 mi (6,732.42 km) |
| Rockford to Katy (Texas) | 940.15 mi (1,513.03 km) |
| Rockford to Kaukauna (Wisconsin) | 145.10 mi (233.52 km) |
| Rockford to Kaysville (Utah) | 1,180.92 mi (1,900.51 km) |
| Rockford to Kearney (Missouri) | 341.92 mi (550.26 km) |
| Rockford to Kearney (Nebraska) | 529.36 mi (851.92 km) |
| Rockford to Kearns (Utah) | 1,189.75 mi (1,914.72 km) |
| Rockford to Kearny (New Jersey) | 779.18 mi (1,253.97 km) |
