| Northampton to Ilawa | 854.64 mi (1,375.42 km) |
| Northampton to Imielin | 880.02 mi (1,416.26 km) |
| Northampton to Inowroclaw | 804.02 mi (1,293.94 km) |
| Northampton to Janow Lubelski | 1,004.24 mi (1,616.17 km) |
| Northampton to Jarocin | 778.83 mi (1,253.40 km) |
| Northampton to Jaroslaw | 1,028.93 mi (1,655.90 km) |
| Northampton to Jasien | 813.94 mi (1,309.91 km) |
| Northampton to Jaslo | 983.61 mi (1,582.97 km) |
| Northampton to Jastrzebie-Zdroj | 857.07 mi (1,379.33 km) |
| Northampton to Jawor | 735.75 mi (1,184.08 km) |
| Northampton to Jaworzno | 880.83 mi (1,417.57 km) |
| Northampton to Jedrzejow | 916.25 mi (1,474.56 km) |
| Northampton to Jelcz-Laskowice | 783.97 mi (1,261.67 km) |
| Northampton to Jelenia Gora | 718.40 mi (1,156.15 km) |
| Northampton to Jozefoslaw | 926.32 mi (1,490.77 km) |
