| Southborough to Imola | 708.50 mi (1,140.21 km) |
| Southborough to Impruneta | 726.92 mi (1,169.86 km) |
| Southborough to Induno Olona | 536.42 mi (863.29 km) |
| Southborough to Inverigo | 555.06 mi (893.28 km) |
| Southborough to Inveruno | 553.82 mi (891.29 km) |
| Southborough to Inzago | 573.94 mi (923.67 km) |
| Southborough to Iseo | 587.37 mi (945.28 km) |
| Southborough to Isernia | 934.94 mi (1,504.64 km) |
| Southborough to Isola Capo Rizzuto | 1,171.62 mi (1,885.54 km) |
| Southborough to Isola del Liri | 908.81 mi (1,462.58 km) |
| Southborough to Isola della Scala | 639.51 mi (1,029.19 km) |
| Southborough to Isola Vicentina | 638.47 mi (1,027.52 km) |
| Southborough to Ispica | 1,226.50 mi (1,973.86 km) |
| Southborough to Istrana | 660.30 mi (1,062.65 km) |
| Southborough to Itri | 928.85 mi (1,494.84 km) |
