| Portsmouth to Grigiskes | 1,120.40 mi (1,803.11 km) |
| Portsmouth to Ignalina | 1,165.56 mi (1,875.79 km) |
| Portsmouth to Jonava | 1,089.89 mi (1,754.00 km) |
| Portsmouth to Joniskis | 1,074.16 mi (1,728.69 km) |
| Portsmouth to Jurbarkas | 1,030.41 mi (1,658.28 km) |
| Portsmouth to Kaisiadorys | 1,095.41 mi (1,762.90 km) |
| Portsmouth to Kalvarija | 1,044.03 mi (1,680.20 km) |
| Portsmouth to Kaunas | 1,073.24 mi (1,727.22 km) |
| Portsmouth to Kazlu Ruda | 1,057.07 mi (1,701.19 km) |
| Portsmouth to Kedainiai | 1,079.01 mi (1,736.50 km) |
| Portsmouth to Kelme | 1,041.98 mi (1,676.91 km) |
| Portsmouth to Klaipeda | 975.59 mi (1,570.06 km) |
| Portsmouth to Kretinga | 980.38 mi (1,577.76 km) |
| Portsmouth to Kupiskis | 1,122.23 mi (1,806.06 km) |
| Portsmouth to Kursenai | 1,045.24 mi (1,682.15 km) |
