| Hard to Kenosha (Wisconsin) | 4,444.22 mi (7,152.27 km) |
| Hard to Kent (Ohio) | 4,255.69 mi (6,848.87 km) |
| Hard to Kent (Washington) | 5,271.25 mi (8,483.26 km) |
| Hard to Kentwood (Michigan) | 4,343.64 mi (6,990.41 km) |
| Hard to Kerman (California) | 5,843.93 mi (9,404.89 km) |
| Hard to Kernersville (North Carolina) | 4,430.01 mi (7,129.41 km) |
| Hard to Kerrville (Texas) | 5,500.74 mi (8,852.59 km) |
| Hard to Kettering (Maryland) | 4,167.99 mi (6,707.73 km) |
| Hard to Kettering (Ohio) | 4,432.37 mi (7,133.21 km) |
| Hard to Kewanee (Illinois) | 4,584.73 mi (7,378.42 km) |
| Hard to Key Biscayne (Florida) | 4,924.30 mi (7,924.90 km) |
| Hard to Key Largo (Florida) | 4,962.83 mi (7,986.91 km) |
| Hard to Key West (Florida) | 5,050.72 mi (8,128.34 km) |
| Hard to Keystone (Florida) | 4,913.23 mi (7,907.08 km) |
| Hard to Kihei (Hawaii) | 7,642.71 mi (12,299.75 km) |
