| Middlesex to Kingsville (Texas) | 1,605.39 mi (2,583.62 km) |
| Middlesex to Kinston (North Carolina) | 403.04 mi (648.62 km) |
| Middlesex to Kirkland (Washington) | 2,376.98 mi (3,825.38 km) |
| Middlesex to Kirksville (Missouri) | 949.88 mi (1,528.69 km) |
| Middlesex to Kirkwood (Missouri) | 857.69 mi (1,380.33 km) |
| Middlesex to Kiryas Joel (New York) | 55.77 mi (89.76 km) |
| Middlesex to Kissimmee (Florida) | 934.11 mi (1,503.31 km) |
| Middlesex to Klamath Falls (Oregon) | 2,421.15 mi (3,896.47 km) |
| Middlesex to Knightdale (North Carolina) | 395.26 mi (636.11 km) |
| Middlesex to Knik-Fairview (Alaska) | 3,340.13 mi (5,375.42 km) |
| Middlesex to Knoxville (Tennessee) | 602.73 mi (970.01 km) |
| Middlesex to Kokomo (Indiana) | 610.28 mi (982.15 km) |
| Middlesex to Kuna (Idaho) | 2,136.61 mi (3,438.54 km) |
| Middlesex to Kyle (Texas) | 1,501.13 mi (2,415.84 km) |
| Middlesex to La Cañada Flintridge (California) | 2,413.61 mi (3,884.33 km) |
