| Donostia to Isny im Allgau | 654.74 mi (1,053.70 km) |
| Donostia to Isselburg | 706.77 mi (1,137.43 km) |
| Donostia to Issum | 689.50 mi (1,109.64 km) |
| Donostia to Itzehoe | 899.02 mi (1,446.83 km) |
| Donostia to Jena | 824.21 mi (1,326.43 km) |
| Donostia to Jever | 839.12 mi (1,350.43 km) |
| Donostia to Jork | 883.03 mi (1,421.10 km) |
| Donostia to Juchen | 668.03 mi (1,075.09 km) |
| Donostia to Julich | 654.54 mi (1,053.38 km) |
| Donostia to Juterbog | 918.70 mi (1,478.51 km) |
| Donostia to Kaarst | 677.36 mi (1,090.10 km) |
| Donostia to Kaiserslautern | 627.56 mi (1,009.96 km) |
| Donostia to Kalkar | 697.09 mi (1,121.86 km) |
| Donostia to Kall | 640.59 mi (1,030.93 km) |
| Donostia to Kaltenkirchen | 906.37 mi (1,458.67 km) |
