| Potomac to Ilawa | 4,359.99 mi (7,016.73 km) |
| Potomac to Imielin | 4,469.45 mi (7,192.88 km) |
| Potomac to Inowroclaw | 4,340.78 mi (6,985.82 km) |
| Potomac to Janow Lubelski | 4,567.15 mi (7,350.12 km) |
| Potomac to Jarocin | 4,341.01 mi (6,986.19 km) |
| Potomac to Jaroslaw | 4,603.32 mi (7,408.32 km) |
| Potomac to Jasien | 4,299.08 mi (6,918.71 km) |
| Potomac to Jaslo | 4,568.53 mi (7,352.34 km) |
| Potomac to Jastrzebie-Zdroj | 4,451.96 mi (7,164.73 km) |
| Potomac to Jawor | 4,323.24 mi (6,957.58 km) |
| Potomac to Jaworzno | 4,468.91 mi (7,192.01 km) |
| Potomac to Jedrzejow | 4,492.03 mi (7,229.22 km) |
| Potomac to Jelcz-Laskowice | 4,366.68 mi (7,027.50 km) |
| Potomac to Jelenia Gora | 4,310.43 mi (6,936.97 km) |
| Potomac to Jozefoslaw | 4,466.07 mi (7,187.45 km) |
