| South Portland to Grigiskes | 4,036.86 mi (6,496.70 km) |
| South Portland to Ignalina | 4,047.25 mi (6,513.42 km) |
| South Portland to Jonava | 3,994.40 mi (6,428.37 km) |
| South Portland to Joniskis | 3,930.36 mi (6,325.31 km) |
| South Portland to Jurbarkas | 3,942.70 mi (6,345.16 km) |
| South Portland to Kaisiadorys | 4,007.57 mi (6,449.56 km) |
| South Portland to Kalvarija | 3,981.74 mi (6,407.98 km) |
| South Portland to Kaunas | 3,987.36 mi (6,417.04 km) |
| South Portland to Kazlu Ruda | 3,979.51 mi (6,404.40 km) |
| South Portland to Kedainiai | 3,976.24 mi (6,399.14 km) |
| South Portland to Kelme | 3,929.08 mi (6,323.25 km) |
| South Portland to Klaipeda | 3,865.35 mi (6,220.68 km) |
| South Portland to Kretinga | 3,863.20 mi (6,217.22 km) |
| South Portland to Kupiskis | 3,989.82 mi (6,421.00 km) |
| South Portland to Kursenai | 3,916.34 mi (6,302.75 km) |
