| South Portland to Isny im Allgau | 3,709.72 mi (5,970.21 km) |
| South Portland to Isselburg | 3,443.40 mi (5,541.62 km) |
| South Portland to Issum | 3,449.61 mi (5,551.61 km) |
| South Portland to Itzehoe | 3,504.31 mi (5,639.64 km) |
| South Portland to Jena | 3,670.14 mi (5,906.52 km) |
| South Portland to Jever | 3,452.73 mi (5,556.64 km) |
| South Portland to Jork | 3,521.16 mi (5,666.76 km) |
| South Portland to Juchen | 3,464.62 mi (5,575.76 km) |
| South Portland to Julich | 3,463.80 mi (5,574.45 km) |
| South Portland to Juterbog | 3,694.62 mi (5,945.91 km) |
| South Portland to Kaarst | 3,466.02 mi (5,578.02 km) |
| South Portland to Kaiserslautern | 3,562.78 mi (5,733.74 km) |
| South Portland to Kalkar | 3,439.05 mi (5,534.62 km) |
| South Portland to Kall | 3,481.79 mi (5,603.40 km) |
| South Portland to Kaltenkirchen | 3,523.25 mi (5,670.12 km) |
