| South Portland to Jicin | 3,831.91 mi (6,166.87 km) |
| South Portland to Jihlava | 3,876.12 mi (6,238.01 km) |
| South Portland to Jindrichuv Hradec | 3,861.77 mi (6,214.92 km) |
| South Portland to Jirkov | 3,756.10 mi (6,044.86 km) |
| South Portland to Kadan | 3,753.20 mi (6,040.20 km) |
| South Portland to Karlovy Vary | 3,742.27 mi (6,022.60 km) |
| South Portland to Karvina | 3,974.46 mi (6,396.28 km) |
| South Portland to Kladno | 3,792.85 mi (6,104.01 km) |
| South Portland to Klasterec nad Ohri | 3,749.03 mi (6,033.48 km) |
| South Portland to Klatovy | 3,785.95 mi (6,092.90 km) |
| South Portland to Kolin | 3,839.71 mi (6,179.41 km) |
| South Portland to Koprivnice | 3,968.24 mi (6,386.27 km) |
| South Portland to Kralupy nad Vltavou | 3,798.10 mi (6,112.46 km) |
| South Portland to Kraluv Dvur | 3,796.86 mi (6,110.45 km) |
| South Portland to Krnov | 3,933.86 mi (6,330.94 km) |
