| Southborough to Karditsa | 1,322.89 mi (2,128.99 km) |
| Southborough to Kastoria | 1,242.80 mi (2,000.09 km) |
| Southborough to Katerini | 1,302.04 mi (2,095.44 km) |
| Southborough to Keratsini | 1,456.17 mi (2,343.47 km) |
| Southborough to Kerkyra | 1,236.05 mi (1,989.22 km) |
| Southborough to Kiato | 1,421.54 mi (2,287.74 km) |
| Southborough to Kifisia | 1,457.92 mi (2,346.29 km) |
| Southborough to Kilkis | 1,283.40 mi (2,065.43 km) |
| Southborough to Komotini | 1,380.42 mi (2,221.57 km) |
| Southborough to Korinthos | 1,431.76 mi (2,304.20 km) |
| Southborough to Koropi | 1,469.17 mi (2,364.40 km) |
| Southborough to Korydallos | 1,456.59 mi (2,344.16 km) |
| Southborough to Kos | 1,649.89 mi (2,655.23 km) |
| Southborough to Kozani | 1,272.85 mi (2,048.45 km) |
| Southborough to Lagos | 1,365.99 mi (2,198.34 km) |
