| Southborough to Isny im Allgau | 499.79 mi (804.33 km) |
| Southborough to Isselburg | 270.70 mi (435.64 km) |
| Southborough to Issum | 266.96 mi (429.64 km) |
| Southborough to Itzehoe | 432.71 mi (696.38 km) |
| Southborough to Jena | 491.57 mi (791.10 km) |
| Southborough to Jever | 362.51 mi (583.40 km) |
| Southborough to Jork | 429.56 mi (691.31 km) |
| Southborough to Juchen | 270.36 mi (435.10 km) |
| Southborough to Julich | 265.14 mi (426.70 km) |
| Southborough to Juterbog | 552.23 mi (888.73 km) |
| Southborough to Kaarst | 275.00 mi (442.56 km) |
| Southborough to Kaiserslautern | 351.53 mi (565.73 km) |
| Southborough to Kalkar | 262.52 mi (422.48 km) |
| Southborough to Kall | 277.25 mi (446.19 km) |
| Southborough to Kaltenkirchen | 447.38 mi (719.98 km) |
