| Porthcawl to Ilawa | 983.65 mi (1,583.04 km) |
| Porthcawl to Imielin | 1,000.36 mi (1,609.92 km) |
| Porthcawl to Inowroclaw | 931.65 mi (1,499.34 km) |
| Porthcawl to Janow Lubelski | 1,127.97 mi (1,815.30 km) |
| Porthcawl to Jarocin | 904.35 mi (1,455.42 km) |
| Porthcawl to Jaroslaw | 1,150.91 mi (1,852.21 km) |
| Porthcawl to Jasien | 943.71 mi (1,518.75 km) |
| Porthcawl to Jaslo | 1,104.09 mi (1,776.86 km) |
| Porthcawl to Jastrzebie-Zdroj | 976.31 mi (1,571.22 km) |
| Porthcawl to Jawor | 857.77 mi (1,380.45 km) |
| Porthcawl to Jaworzno | 1,001.45 mi (1,611.69 km) |
| Porthcawl to Jedrzejow | 1,038.82 mi (1,671.82 km) |
| Porthcawl to Jelcz-Laskowice | 906.46 mi (1,458.81 km) |
| Porthcawl to Jelenia Gora | 839.59 mi (1,351.18 km) |
| Porthcawl to Jozefoslaw | 1,052.90 mi (1,694.48 km) |
