| Fairfax to Kinston (North Carolina) | 247.77 mi (398.75 km) |
| Fairfax to Kirkland (Washington) | 2,305.18 mi (3,709.83 km) |
| Fairfax to Kirksville (Missouri) | 818.36 mi (1,317.02 km) |
| Fairfax to Kirkwood (Missouri) | 706.98 mi (1,137.78 km) |
| Fairfax to Kiryas Joel (New York) | 238.65 mi (384.07 km) |
| Fairfax to Kissimmee (Florida) | 766.18 mi (1,233.05 km) |
| Fairfax to Klamath Falls (Oregon) | 2,320.48 mi (3,734.45 km) |
| Fairfax to Knightdale (North Carolina) | 221.54 mi (356.54 km) |
| Fairfax to Knik-Fairview (Alaska) | 3,343.00 mi (5,380.05 km) |
| Fairfax to Knoxville (Tennessee) | 415.64 mi (668.91 km) |
| Fairfax to Kokomo (Indiana) | 482.36 mi (776.29 km) |
| Fairfax to Kuna (Idaho) | 2,039.22 mi (3,281.81 km) |
| Fairfax to Kyle (Texas) | 1,319.04 mi (2,122.79 km) |
| Fairfax to La Cañada Flintridge (California) | 2,274.20 mi (3,659.97 km) |
| Fairfax to La Crescenta-Montrose (California) | 2,275.54 mi (3,662.13 km) |
