| Thetford to Imola | 749.06 mi (1,205.49 km) |
| Thetford to Impruneta | 772.47 mi (1,243.18 km) |
| Thetford to Induno Olona | 581.78 mi (936.28 km) |
| Thetford to Inverigo | 599.20 mi (964.32 km) |
| Thetford to Inveruno | 601.04 mi (967.28 km) |
| Thetford to Inzago | 617.98 mi (994.54 km) |
| Thetford to Iseo | 627.97 mi (1,010.61 km) |
| Thetford to Isernia | 977.64 mi (1,573.36 km) |
| Thetford to Isola Capo Rizzuto | 1,213.65 mi (1,953.18 km) |
| Thetford to Isola del Liri | 953.50 mi (1,534.51 km) |
| Thetford to Isola della Scala | 678.12 mi (1,091.33 km) |
| Thetford to Isola Vicentina | 673.02 mi (1,083.13 km) |
| Thetford to Ispica | 1,279.86 mi (2,059.73 km) |
| Thetford to Istrana | 691.86 mi (1,113.44 km) |
| Thetford to Itri | 975.01 mi (1,569.12 km) |
