| Southborough to Keizer (Oregon) | 4,981.45 mi (8,016.86 km) |
| Southborough to Keller (Texas) | 4,782.39 mi (7,696.52 km) |
| Southborough to Kelso (Washington) | 4,913.35 mi (7,907.28 km) |
| Southborough to Kemp Mill (Maryland) | 3,681.76 mi (5,925.22 km) |
| Southborough to Ken Caryl (Colorado) | 4,726.31 mi (7,606.27 km) |
| Southborough to Kendale Lakes (Florida) | 4,461.14 mi (7,179.52 km) |
| Southborough to Kendall (Florida) | 4,460.85 mi (7,179.04 km) |
| Southborough to Kendall Park (New Jersey) | 3,520.66 mi (5,665.96 km) |
| Southborough to Kendall West (Florida) | 4,462.55 mi (7,181.78 km) |
| Southborough to Kenmore (New York) | 3,584.36 mi (5,768.47 km) |
| Southborough to Kenmore (Washington) | 4,803.19 mi (7,729.98 km) |
| Southborough to Kenner (Louisiana) | 4,655.38 mi (7,492.11 km) |
| Southborough to Kennesaw (Georgia) | 4,226.46 mi (6,801.84 km) |
| Southborough to Kennett (Missouri) | 4,336.39 mi (6,978.74 km) |
| Southborough to Kennewick (Washington) | 4,807.91 mi (7,737.59 km) |
