| Leiria to Imola | 1,096.14 mi (1,764.07 km) |
| Leiria to Impruneta | 1,066.24 mi (1,715.95 km) |
| Leiria to Induno Olona | 985.46 mi (1,585.95 km) |
| Leiria to Inverigo | 1,000.42 mi (1,610.02 km) |
| Leiria to Inveruno | 978.96 mi (1,575.48 km) |
| Leiria to Inzago | 1,008.57 mi (1,623.13 km) |
| Leiria to Iseo | 1,037.46 mi (1,669.64 km) |
| Leiria to Isernia | 1,210.43 mi (1,947.99 km) |
| Leiria to Isola Capo Rizzuto | 1,379.75 mi (2,220.49 km) |
| Leiria to Isola del Liri | 1,175.88 mi (1,892.40 km) |
| Leiria to Isola della Scala | 1,075.23 mi (1,730.41 km) |
| Leiria to Isola Vicentina | 1,102.01 mi (1,773.52 km) |
| Leiria to Ispica | 1,297.99 mi (2,088.92 km) |
| Leiria to Istrana | 1,133.30 mi (1,823.87 km) |
| Leiria to Itri | 1,174.59 mi (1,890.32 km) |
