| Boise to Kaneohe (Hawaii) | 2,823.90 mi (4,544.63 km) |
| Boise to Kankakee (Illinois) | 1,451.55 mi (2,336.05 km) |
| Boise to Kannapolis (North Carolina) | 1,960.95 mi (3,155.85 km) |
| Boise to Kansas City (Kansas) | 1,152.71 mi (1,855.10 km) |
| Boise to Kansas City (Missouri) | 1,162.12 mi (1,870.26 km) |
| Boise to Kapaa (Hawaii) | 2,866.36 mi (4,612.97 km) |
| Boise to Kapolei (Hawaii) | 2,840.11 mi (4,570.72 km) |
| Boise to Katy (Texas) | 1,471.66 mi (2,368.41 km) |
| Boise to Kaukauna (Wisconsin) | 1,385.45 mi (2,229.67 km) |
| Boise to Kaysville (Utah) | 281.89 mi (453.66 km) |
| Boise to Kearney (Missouri) | 1,165.76 mi (1,876.11 km) |
| Boise to Kearney (Nebraska) | 899.16 mi (1,447.07 km) |
| Boise to Kearns (Utah) | 297.07 mi (478.10 km) |
| Boise to Kearny (New Jersey) | 2,142.02 mi (3,447.25 km) |
| Boise to Keene (New Hampshire) | 2,184.21 mi (3,515.15 km) |
