| Estoril to Imola | 1,155.74 mi (1,859.99 km) |
| Estoril to Impruneta | 1,123.84 mi (1,808.64 km) |
| Estoril to Induno Olona | 1,051.29 mi (1,691.89 km) |
| Estoril to Inverigo | 1,065.64 mi (1,714.98 km) |
| Estoril to Inveruno | 1,043.81 mi (1,679.86 km) |
| Estoril to Inzago | 1,073.03 mi (1,726.88 km) |
| Estoril to Iseo | 1,101.92 mi (1,773.37 km) |
| Estoril to Isernia | 1,260.19 mi (2,028.08 km) |
| Estoril to Isola Capo Rizzuto | 1,421.04 mi (2,286.94 km) |
| Estoril to Isola del Liri | 1,225.92 mi (1,972.93 km) |
| Estoril to Isola della Scala | 1,137.99 mi (1,831.41 km) |
| Estoril to Isola Vicentina | 1,165.57 mi (1,875.80 km) |
| Estoril to Ispica | 1,330.26 mi (2,140.84 km) |
| Estoril to Istrana | 1,196.65 mi (1,925.82 km) |
| Estoril to Itri | 1,223.20 mi (1,968.55 km) |
