| Potters Bar to Isny im Allgau | 533.47 mi (858.53 km) |
| Potters Bar to Isselburg | 284.40 mi (457.70 km) |
| Potters Bar to Issum | 283.54 mi (456.31 km) |
| Potters Bar to Itzehoe | 432.88 mi (696.65 km) |
| Potters Bar to Jena | 510.51 mi (821.58 km) |
| Potters Bar to Jever | 362.66 mi (583.64 km) |
| Potters Bar to Jork | 432.43 mi (695.92 km) |
| Potters Bar to Juchen | 290.98 mi (468.29 km) |
| Potters Bar to Julich | 287.46 mi (462.62 km) |
| Potters Bar to Juterbog | 565.40 mi (909.93 km) |
| Potters Bar to Kaarst | 294.51 mi (473.97 km) |
| Potters Bar to Kaiserslautern | 381.84 mi (614.51 km) |
| Potters Bar to Kalkar | 277.11 mi (445.96 km) |
| Potters Bar to Kall | 302.43 mi (486.72 km) |
| Potters Bar to Kaltenkirchen | 448.63 mi (722.00 km) |
