| South Portland to Imola | 3,892.24 mi (6,263.96 km) |
| South Portland to Impruneta | 3,895.96 mi (6,269.94 km) |
| South Portland to Induno Olona | 3,719.05 mi (5,985.23 km) |
| South Portland to Inverigo | 3,739.13 mi (6,017.55 km) |
| South Portland to Inveruno | 3,730.71 mi (6,004.01 km) |
| South Portland to Inzago | 3,757.07 mi (6,046.41 km) |
| South Portland to Iseo | 3,777.02 mi (6,078.53 km) |
| South Portland to Isernia | 4,100.92 mi (6,599.79 km) |
| South Portland to Isola Capo Rizzuto | 4,328.22 mi (6,965.60 km) |
| South Portland to Isola del Liri | 4,069.15 mi (6,548.66 km) |
| South Portland to Isola della Scala | 3,830.63 mi (6,164.81 km) |
| South Portland to Isola Vicentina | 3,836.68 mi (6,174.53 km) |
| South Portland to Ispica | 4,318.17 mi (6,949.42 km) |
| South Portland to Istrana | 3,862.19 mi (6,215.60 km) |
| South Portland to Itri | 4,082.30 mi (6,569.82 km) |
