| Castel San Giorgio to Ifield | 1,007.89 mi (1,622.05 km) |
| Castel San Giorgio to Ilford | 1,017.65 mi (1,637.75 km) |
| Castel San Giorgio to Ilfracombe | 1,149.59 mi (1,850.08 km) |
| Castel San Giorgio to Ilkeston | 1,126.62 mi (1,813.12 km) |
| Castel San Giorgio to Ilkley | 1,186.76 mi (1,909.90 km) |
| Castel San Giorgio to Immingham | 1,125.01 mi (1,810.54 km) |
| Castel San Giorgio to Ince-in-Makerfield | 1,192.63 mi (1,919.36 km) |
| Castel San Giorgio to Inverness | 1,425.73 mi (2,294.49 km) |
| Castel San Giorgio to Inverurie | 1,369.17 mi (2,203.46 km) |
| Castel San Giorgio to Ipswich | 1,008.14 mi (1,622.45 km) |
| Castel San Giorgio to Irlam | 1,182.83 mi (1,903.58 km) |
| Castel San Giorgio to Irthlingborough | 1,075.08 mi (1,730.18 km) |
| Castel San Giorgio to Irvine | 1,349.25 mi (2,171.41 km) |
| Castel San Giorgio to Islington | 1,023.15 mi (1,646.60 km) |
| Castel San Giorgio to Iver | 1,035.37 mi (1,666.27 km) |
