| Castelo Branco to Imola | 1,031.11 mi (1,659.40 km) |
| Castelo Branco to Impruneta | 1,000.31 mi (1,609.84 km) |
| Castelo Branco to Induno Olona | 924.26 mi (1,487.45 km) |
| Castelo Branco to Inverigo | 938.75 mi (1,510.78 km) |
| Castelo Branco to Inveruno | 917.02 mi (1,475.80 km) |
| Castelo Branco to Inzago | 946.36 mi (1,523.01 km) |
| Castelo Branco to Iseo | 975.25 mi (1,569.51 km) |
| Castelo Branco to Isernia | 1,142.21 mi (1,838.21 km) |
| Castelo Branco to Isola Capo Rizzuto | 1,310.61 mi (2,109.22 km) |
| Castelo Branco to Isola del Liri | 1,107.72 mi (1,782.70 km) |
| Castelo Branco to Isola della Scala | 1,011.91 mi (1,628.51 km) |
| Castelo Branco to Isola Vicentina | 1,039.20 mi (1,672.43 km) |
| Castelo Branco to Ispica | 1,229.18 mi (1,978.18 km) |
| Castelo Branco to Istrana | 1,070.36 mi (1,722.58 km) |
| Castelo Branco to Itri | 1,106.16 mi (1,780.19 km) |
