| Thornaby on Tees to Imola | 912.99 mi (1,469.31 km) |
| Thornaby on Tees to Impruneta | 938.73 mi (1,510.73 km) |
| Thornaby on Tees to Induno Olona | 748.73 mi (1,204.96 km) |
| Thornaby on Tees to Inverigo | 765.58 mi (1,232.08 km) |
| Thornaby on Tees to Inveruno | 768.60 mi (1,236.93 km) |
| Thornaby on Tees to Inzago | 784.21 mi (1,262.06 km) |
| Thornaby on Tees to Iseo | 792.57 mi (1,275.52 km) |
| Thornaby on Tees to Isernia | 1,141.87 mi (1,837.67 km) |
| Thornaby on Tees to Isola Capo Rizzuto | 1,376.95 mi (2,215.98 km) |
| Thornaby on Tees to Isola del Liri | 1,118.82 mi (1,800.57 km) |
| Thornaby on Tees to Isola della Scala | 841.40 mi (1,354.10 km) |
| Thornaby on Tees to Isola Vicentina | 834.01 mi (1,342.22 km) |
| Thornaby on Tees to Ispica | 1,448.36 mi (2,330.91 km) |
| Thornaby on Tees to Istrana | 850.81 mi (1,369.24 km) |
| Thornaby on Tees to Itri | 1,140.98 mi (1,836.23 km) |
