| Porthcawl to Isny im Allgau | 667.05 mi (1,073.52 km) |
| Porthcawl to Isselburg | 435.68 mi (701.16 km) |
| Porthcawl to Issum | 434.58 mi (699.40 km) |
| Porthcawl to Itzehoe | 577.16 mi (928.85 km) |
| Porthcawl to Jena | 661.21 mi (1,064.12 km) |
| Porthcawl to Jever | 507.60 mi (816.90 km) |
| Porthcawl to Jork | 579.02 mi (931.84 km) |
| Porthcawl to Juchen | 440.79 mi (709.39 km) |
| Porthcawl to Julich | 436.38 mi (702.28 km) |
| Porthcawl to Juterbog | 716.53 mi (1,153.14 km) |
| Porthcawl to Kaarst | 444.78 mi (715.81 km) |
| Porthcawl to Kaiserslautern | 522.64 mi (841.10 km) |
| Porthcawl to Kalkar | 428.37 mi (689.39 km) |
| Porthcawl to Kall | 449.33 mi (723.13 km) |
| Porthcawl to Kaltenkirchen | 593.78 mi (955.59 km) |
