| Middlesex to Kennewick (Washington) | 2,246.05 mi (3,614.67 km) |
| Middlesex to Kenosha (Wisconsin) | 704.37 mi (1,133.58 km) |
| Middlesex to Kent (Ohio) | 360.56 mi (580.26 km) |
| Middlesex to Kent (Washington) | 2,379.65 mi (3,829.67 km) |
| Middlesex to Kentwood (Michigan) | 593.28 mi (954.79 km) |
| Middlesex to Kerman (California) | 2,445.47 mi (3,935.60 km) |
| Middlesex to Kernersville (North Carolina) | 432.06 mi (695.34 km) |
| Middlesex to Kerrville (Texas) | 1,560.41 mi (2,511.24 km) |
| Middlesex to Kettering (Maryland) | 168.34 mi (270.91 km) |
| Middlesex to Kettering (Ohio) | 513.00 mi (825.59 km) |
| Middlesex to Kewanee (Illinois) | 805.74 mi (1,296.72 km) |
| Middlesex to Key Biscayne (Florida) | 1,078.66 mi (1,735.94 km) |
| Middlesex to Key Largo (Florida) | 1,120.67 mi (1,803.55 km) |
| Middlesex to Key West (Florida) | 1,183.43 mi (1,904.55 km) |
| Middlesex to Keystone (Florida) | 974.91 mi (1,568.96 km) |
