| Walnut Creek to Kingsville (Texas) | 1,571.91 mi (2,529.75 km) |
| Walnut Creek to Kinston (North Carolina) | 2,449.13 mi (3,941.50 km) |
| Walnut Creek to Kirkland (Washington) | 676.79 mi (1,089.19 km) |
| Walnut Creek to Kirksville (Missouri) | 1,581.64 mi (2,545.40 km) |
| Walnut Creek to Kirkwood (Missouri) | 1,708.03 mi (2,748.81 km) |
| Walnut Creek to Kiryas Joel (New York) | 2,526.54 mi (4,066.07 km) |
| Walnut Creek to Kissimmee (Florida) | 2,422.21 mi (3,898.17 km) |
| Walnut Creek to Klamath Falls (Oregon) | 298.61 mi (480.57 km) |
| Walnut Creek to Knightdale (North Carolina) | 2,390.08 mi (3,846.47 km) |
| Walnut Creek to Knik-Fairview (Alaska) | 2,012.56 mi (3,238.90 km) |
| Walnut Creek to Knoxville (Tennessee) | 2,093.24 mi (3,368.75 km) |
| Walnut Creek to Kokomo (Indiana) | 1,918.18 mi (3,087.01 km) |
| Walnut Creek to Kuna (Idaho) | 485.99 mi (782.12 km) |
| Walnut Creek to Kyle (Texas) | 1,482.97 mi (2,386.61 km) |
| Walnut Creek to La Cañada Flintridge (California) | 333.24 mi (536.30 km) |
