| Sintra to Imola | 1,152.35 mi (1,854.52 km) |
| Sintra to Impruneta | 1,120.65 mi (1,803.51 km) |
| Sintra to Induno Olona | 1,047.20 mi (1,685.30 km) |
| Sintra to Inverigo | 1,061.62 mi (1,708.51 km) |
| Sintra to Inveruno | 1,039.83 mi (1,673.45 km) |
| Sintra to Inzago | 1,069.10 mi (1,720.55 km) |
| Sintra to Iseo | 1,097.99 mi (1,767.04 km) |
| Sintra to Isernia | 1,257.81 mi (2,024.24 km) |
| Sintra to Isola Capo Rizzuto | 1,419.48 mi (2,284.43 km) |
| Sintra to Isola del Liri | 1,223.51 mi (1,969.04 km) |
| Sintra to Isola della Scala | 1,134.25 mi (1,825.39 km) |
| Sintra to Isola Vicentina | 1,161.74 mi (1,869.65 km) |
| Sintra to Ispica | 1,329.52 mi (2,139.65 km) |
| Sintra to Istrana | 1,192.85 mi (1,919.70 km) |
| Sintra to Itri | 1,220.93 mi (1,964.89 km) |
